DEBUG: Call stack for the definition of repository 'gapic_generator_python' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:224:1
DEBUG: Rule 'gapic_generator_typescript' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "a7114028de1eb5437d1d5bc1465070341cea4c4394a0bf713b429e8e396dab15"
DEBUG: Call stack for the definition of repository 'gapic_generator_typescript' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:280:1
ERROR: Skipping '//google/iam/v1:google-iam-v1-java': no such target '//google/iam/v1:google-iam-v1-java': target 'google-iam-v1-java' not declared in package 'google/iam/v1' defined by /home/kbuilder/.cache/synthtool/googleapis/google/iam/v1/BUILD.bazel
WARNING: Target pattern parsing failed.
ERROR: no such target '//google/iam/v1:google-iam-v1-java': target 'google-iam-v1-java' not declared in package 'google/iam/v1' defined by /home/kbuilder/.cache/synthtool/googleapis/google/iam/v1/BUILD.bazel
INFO: Elapsed time: 0.116s
INFO: 0 processes.
FAILED: Build did NOT complete successfully (0 packages loaded)
FAILED: Build did NOT complete successfully (0 packages loaded)

Traceback (most recent call last):
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/tmpfs/src/github/synthtool/synthtool/__main__.py", line 102, in <module>
    main()
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 782, in main
    rv = self.invoke(ctx)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/tmpfs/src/github/synthtool/synthtool/__main__.py", line 94, in main
    spec.loader.exec_module(synth_module)  # type: ignore
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/kbuilder/.cache/synthtool/java-iam/synth.py", line 31, in <module>
    bazel_target=f'//google/iam/{version}:google-iam-{version}-java',
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 62, in java_library
    service, version, "java", tar_strip_components=0, **kwargs
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 183, in _generate_code
    shell.run(bazel_run_args)
  File "/tmpfs/src/github/synthtool/synthtool/shell.py", line 39, in run
    raise exc
  File "/tmpfs/src/github/synthtool/synthtool/shell.py", line 33, in run
    encoding="utf-8",
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/subprocess.py", line 438, in run
    output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command '['bazel', '--max_idle_secs=240', 'build', '//google/iam/v1:google-iam-v1-java']' returned non-zero exit status 1.
2020-08-17 02:19:46,756 autosynth [ERROR] > Synthesis failed
2020-08-17 02:19:46,756 autosynth [DEBUG] > Running: git reset --hard HEAD
HEAD is now at 170f36e chore: fix 1.0.0 release versions (#27)
2020-08-17 02:19:46,761 autosynth [DEBUG] > Running: git checkout autosynth
Switched to branch 'autosynth'
2020-08-17 02:19:46,766 autosynth [DEBUG] > Running: git clean -fdx
Removing __pycache__/
Traceback (most recent call last):
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 690, in <module>
    main()
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 539, in main
    return _inner_main(temp_dir)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 670, in _inner_main
    commit_count = synthesize_loop(x, multiple_prs, change_pusher, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 375, in synthesize_loop
    has_changes = toolbox.synthesize_version_in_new_branch(synthesizer, youngest)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 273, in synthesize_version_in_new_branch
    synthesizer.synthesize(synth_log_path, self.environ)
  File "/tmpfs/src/github/synthtool/autosynth/synthesizer.py", line 120, in synthesize
    synth_proc.check_returncode()  # Raise an exception.
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/subprocess.py", line 389, in check_returncode
    self.stderr)
subprocess.CalledProcessError: Command '['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']' returned non-zero exit status 1.

Google internal developers can see the full log here.

Autosynth is still having trouble generating java-iam. :sob:
Here's the output from running synth.py:
m/v1:google-iam-v1-java:

Loading:
Loading: 0 packages loaded
Loading: 0 packages loaded
Loading: 0 packages loaded
INFO: SHA256 (https://github.com/grpc/grpc/archive/v1.30.2.zip) = 6a327f757b86469336169580199274ea37fe759489406c4da5d389bee637065d
Loading: 0 packages loaded
DEBUG: Rule 'com_github_grpc_grpc' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "6a327f757b86469336169580199274ea37fe759489406c4da5d389bee637065d"
DEBUG: Call stack for the definition of repository 'com_github_grpc_grpc' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:113:1
INFO: SHA256 (https://github.com/googleapis/gax-java/archive/v1.57.2.zip) = 861226f761ca8e9a69eeb5f8be72abfd21d466ef13fdbe73417420878336c63c
DEBUG: Rule 'com_google_api_gax_java' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "861226f761ca8e9a69eeb5f8be72abfd21d466ef13fdbe73417420878336c63c"
DEBUG: Call stack for the definition of repository 'com_google_api_gax_java' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:145:1
Loading: 0 packages loaded
INFO: SHA256 (https://github.com/grpc/grpc-java/archive/v1.30.0.zip) = aff70994303c0055697a8ab00d8b30737d055b1ff42006278a5bda075a1dad4b
DEBUG: Rule 'io_grpc_grpc_java' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "aff70994303c0055697a8ab00d8b30737d055b1ff42006278a5bda075a1dad4b"
DEBUG: Call stack for the definition of repository 'io_grpc_grpc_java' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/com_google_api_gax_java/repositories.bzl:122:5
 - /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/com_google_api_gax_java/repositories.bzl:60:5
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:160:1
Loading: 0 packages loaded
INFO: SHA256 (https://github.com/googleapis/gapic-generator/archive/v2.4.5.zip) = 73f407fe381ab1ad3192176f2fbc0820d3c4aa62fcafe536685803e6853662a6
DEBUG: Rule 'com_google_api_codegen' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "73f407fe381ab1ad3192176f2fbc0820d3c4aa62fcafe536685803e6853662a6"
DEBUG: Call stack for the definition of repository 'com_google_api_codegen' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:77:1
Loading: 0 packages loaded
INFO: SHA256 (https://github.com/googleapis/protoc-java-resource-names-plugin/archive/8d749cb5b7aa2734656e1ad36ceda92894f33153.zip) = 4b714b35ee04ba90f560ee60e64c7357428efcb6b0f3a298f343f8ec2c6d4a5d
DEBUG: Rule 'com_google_protoc_java_resource_names_plugin' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "4b714b35ee04ba90f560ee60e64c7357428efcb6b0f3a298f343f8ec2c6d4a5d"
DEBUG: Call stack for the definition of repository 'com_google_protoc_java_resource_names_plugin' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:177:1
INFO: SHA256 (https://github.com/googleapis/gapic-generator-python/archive/v0.31.0.zip) = 8d11f06b408ac5f1c01da3ca17f3a75dc008831509c5c1a4f24f9bde37792a57
DEBUG: Rule 'gapic_generator_python' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "8d11f06b408ac5f1c01da3ca17f3a75dc008831509c5c1a4f24f9bde37792a57"
DEBUG: Call stack for the definition of repository 'gapic_generator_python' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:224:1
Loading: 0 packages loaded
Loading: 0 packages loaded
INFO: SHA256 (https://github.com/googleapis/gapic-generator-typescript/archive/v1.0.8.tar.gz) = a7114028de1eb5437d1d5bc1465070341cea4c4394a0bf713b429e8e396dab15
DEBUG: Rule 'gapic_generator_typescript' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "a7114028de1eb5437d1d5bc1465070341cea4c4394a0bf713b429e8e396dab15"
DEBUG: Call stack for the definition of repository 'gapic_generator_typescript' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:280:1
ERROR: Skipping '//google/iam/v1:google-iam-v1-java': no such target '//google/iam/v1:google-iam-v1-java': target 'google-iam-v1-java' not declared in package 'google/iam/v1' defined by /home/kbuilder/.cache/synthtool/googleapis/google/iam/v1/BUILD.bazel
WARNING: Target pattern parsing failed.
ERROR: no such target '//google/iam/v1:google-iam-v1-java': target 'google-iam-v1-java' not declared in package 'google/iam/v1' defined by /home/kbuilder/.cache/synthtool/googleapis/google/iam/v1/BUILD.bazel
INFO: Elapsed time: 20.570s
INFO: 0 processes.
FAILED: Build did NOT complete successfully (1 packages loaded)
FAILED: Build did NOT complete successfully (1 packages loaded)

Traceback (most recent call last):
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/tmpfs/src/github/synthtool/synthtool/__main__.py", line 102, in <module>
    main()
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 782, in main
    rv = self.invoke(ctx)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/tmpfs/src/github/synthtool/synthtool/__main__.py", line 94, in main
    spec.loader.exec_module(synth_module)  # type: ignore
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/kbuilder/.cache/synthtool/java-iam/synth.py", line 31, in <module>
    bazel_target=f'//google/iam/{version}:google-iam-{version}-java',
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 62, in java_library
    service, version, "java", tar_strip_components=0, **kwargs
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 183, in _generate_code
    shell.run(bazel_run_args)
  File "/tmpfs/src/github/synthtool/synthtool/shell.py", line 39, in run
    raise exc
  File "/tmpfs/src/github/synthtool/synthtool/shell.py", line 33, in run
    encoding="utf-8",
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/subprocess.py", line 438, in run
    output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command '['bazel', '--max_idle_secs=240', 'build', '//google/iam/v1:google-iam-v1-java']' returned non-zero exit status 1.
2020-08-17 21:30:08,076 autosynth [ERROR] > Synthesis failed
2020-08-17 21:30:08,077 autosynth [DEBUG] > Running: git reset --hard HEAD
HEAD is now at 170f36e chore: fix 1.0.0 release versions (#27)
2020-08-17 21:30:08,083 autosynth [DEBUG] > Running: git checkout autosynth
Switched to branch 'autosynth'
2020-08-17 21:30:08,088 autosynth [DEBUG] > Running: git clean -fdx
Removing __pycache__/
Traceback (most recent call last):
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 690, in <module>
    main()
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 539, in main
    return _inner_main(temp_dir)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 670, in _inner_main
    commit_count = synthesize_loop(x, multiple_prs, change_pusher, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 375, in synthesize_loop
    has_changes = toolbox.synthesize_version_in_new_branch(synthesizer, youngest)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 273, in synthesize_version_in_new_branch
    synthesizer.synthesize(synth_log_path, self.environ)
  File "/tmpfs/src/github/synthtool/autosynth/synthesizer.py", line 120, in synthesize
    synth_proc.check_returncode()  # Raise an exception.
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/subprocess.py", line 389, in check_returncode
    self.stderr)
subprocess.CalledProcessError: Command '['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']' returned non-zero exit status 1.

Google internal developers can see the full log here.

Autosynth is still having trouble generating java-iam. :sob:
Here's the output from running synth.py:
h-name>

HEAD is now at c3caf07 chore(java_templates): add lint/static analysis presubmit checks for samples (#727)
2020-08-18 04:45:54,645 autosynth [DEBUG] > Running: git branch -f autosynth-148
2020-08-18 04:45:54,649 autosynth [DEBUG] > Running: git checkout autosynth-148
Switched to branch 'autosynth-148'
2020-08-18 04:45:54,653 autosynth [INFO] > Running synthtool
2020-08-18 04:45:54,653 autosynth [INFO] > ['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']
2020-08-18 04:45:54,653 autosynth [DEBUG] > log_file_path: /tmpfs/src/logs/java-iam/148/sponge_log.log
2020-08-18 04:45:54,655 autosynth [DEBUG] > Running: /tmpfs/src/github/synthtool/env/bin/python3 -m synthtool --metadata synth.metadata synth.py --
2020-08-18 04:45:54,878 synthtool [DEBUG] > Executing /home/kbuilder/.cache/synthtool/java-iam/synth.py.
On branch autosynth-148
nothing to commit, working tree clean
2020-08-18 04:45:55,017 synthtool [DEBUG] > Ensuring dependencies.
2020-08-18 04:45:55,029 synthtool [DEBUG] > Cloning googleapis.
2020-08-18 04:45:55,706 synthtool [DEBUG] > Generating code for: //google/iam/v1:google-iam-v1-java.
2020-08-18 04:45:55,834 synthtool [ERROR] > Failed executing bazel --max_idle_secs=240 build //google/iam/v1:google-iam-v1-java:

Loading:
Loading: 0 packages loaded
DEBUG: Rule 'com_github_grpc_grpc' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "6a327f757b86469336169580199274ea37fe759489406c4da5d389bee637065d"
DEBUG: Call stack for the definition of repository 'com_github_grpc_grpc' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:113:1
DEBUG: Rule 'com_google_api_gax_java' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "861226f761ca8e9a69eeb5f8be72abfd21d466ef13fdbe73417420878336c63c"
DEBUG: Call stack for the definition of repository 'com_google_api_gax_java' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:145:1
DEBUG: Rule 'io_grpc_grpc_java' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "aff70994303c0055697a8ab00d8b30737d055b1ff42006278a5bda075a1dad4b"
DEBUG: Call stack for the definition of repository 'io_grpc_grpc_java' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/com_google_api_gax_java/repositories.bzl:122:5
 - /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/com_google_api_gax_java/repositories.bzl:60:5
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:160:1
DEBUG: Rule 'com_google_api_codegen' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "73f407fe381ab1ad3192176f2fbc0820d3c4aa62fcafe536685803e6853662a6"
DEBUG: Call stack for the definition of repository 'com_google_api_codegen' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:77:1
DEBUG: Rule 'com_google_protoc_java_resource_names_plugin' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "4b714b35ee04ba90f560ee60e64c7357428efcb6b0f3a298f343f8ec2c6d4a5d"
DEBUG: Call stack for the definition of repository 'com_google_protoc_java_resource_names_plugin' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:177:1
DEBUG: Rule 'gapic_generator_python' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "8d11f06b408ac5f1c01da3ca17f3a75dc008831509c5c1a4f24f9bde37792a57"
DEBUG: Call stack for the definition of repository 'gapic_generator_python' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:224:1
DEBUG: Rule 'gapic_generator_typescript' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "a7114028de1eb5437d1d5bc1465070341cea4c4394a0bf713b429e8e396dab15"
DEBUG: Call stack for the definition of repository 'gapic_generator_typescript' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:280:1
ERROR: Skipping '//google/iam/v1:google-iam-v1-java': no such target '//google/iam/v1:google-iam-v1-java': target 'google-iam-v1-java' not declared in package 'google/iam/v1' defined by /home/kbuilder/.cache/synthtool/googleapis/google/iam/v1/BUILD.bazel
WARNING: Target pattern parsing failed.
ERROR: no such target '//google/iam/v1:google-iam-v1-java': target 'google-iam-v1-java' not declared in package 'google/iam/v1' defined by /home/kbuilder/.cache/synthtool/googleapis/google/iam/v1/BUILD.bazel
INFO: Elapsed time: 0.118s
INFO: 0 processes.
FAILED: Build did NOT complete successfully (1 packages loaded)
FAILED: Build did NOT complete successfully (1 packages loaded)

Traceback (most recent call last):
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/tmpfs/src/github/synthtool/synthtool/__main__.py", line 102, in <module>
    main()
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 782, in main
    rv = self.invoke(ctx)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/tmpfs/src/github/synthtool/synthtool/__main__.py", line 94, in main
    spec.loader.exec_module(synth_module)  # type: ignore
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/kbuilder/.cache/synthtool/java-iam/synth.py", line 31, in <module>
    bazel_target=f'//google/iam/{version}:google-iam-{version}-java',
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 62, in java_library
    service, version, "java", tar_strip_components=0, **kwargs
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 183, in _generate_code
    shell.run(bazel_run_args)
  File "/tmpfs/src/github/synthtool/synthtool/shell.py", line 39, in run
    raise exc
  File "/tmpfs/src/github/synthtool/synthtool/shell.py", line 33, in run
    encoding="utf-8",
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/subprocess.py", line 438, in run
    output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command '['bazel', '--max_idle_secs=240', 'build', '//google/iam/v1:google-iam-v1-java']' returned non-zero exit status 1.
2020-08-18 04:45:55,877 autosynth [ERROR] > Synthesis failed
2020-08-18 04:45:55,877 autosynth [DEBUG] > Running: git reset --hard HEAD
HEAD is now at 170f36e chore: fix 1.0.0 release versions (#27)
2020-08-18 04:45:55,882 autosynth [DEBUG] > Running: git checkout autosynth
Switched to branch 'autosynth'
2020-08-18 04:45:55,887 autosynth [DEBUG] > Running: git clean -fdx
Removing __pycache__/
Traceback (most recent call last):
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 690, in <module>
    main()
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 539, in main
    return _inner_main(temp_dir)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 670, in _inner_main
    commit_count = synthesize_loop(x, multiple_prs, change_pusher, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 375, in synthesize_loop
    has_changes = toolbox.synthesize_version_in_new_branch(synthesizer, youngest)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 273, in synthesize_version_in_new_branch
    synthesizer.synthesize(synth_log_path, self.environ)
  File "/tmpfs/src/github/synthtool/autosynth/synthesizer.py", line 120, in synthesize
    synth_proc.check_returncode()  # Raise an exception.
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/subprocess.py", line 389, in check_returncode
    self.stderr)
subprocess.CalledProcessError: Command '['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']' returned non-zero exit status 1.

Google internal developers can see the full log here.

Autosynth is still having trouble generating java-iam. :sob:
Here's the output from running synth.py:

  git checkout -b <new-branch-name>

HEAD is now at 1a60ff2 feat: enable obsolete file tracking for nodejs (#728)
2020-08-18 18:22:41,166 autosynth [DEBUG] > Running: git branch -f autosynth-150
2020-08-18 18:22:41,169 autosynth [DEBUG] > Running: git checkout autosynth-150
Switched to branch 'autosynth-150'
2020-08-18 18:22:41,173 autosynth [INFO] > Running synthtool
2020-08-18 18:22:41,173 autosynth [INFO] > ['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']
2020-08-18 18:22:41,174 autosynth [DEBUG] > log_file_path: /tmpfs/src/logs/java-iam/150/sponge_log.log
2020-08-18 18:22:41,176 autosynth [DEBUG] > Running: /tmpfs/src/github/synthtool/env/bin/python3 -m synthtool --metadata synth.metadata synth.py --
2020-08-18 18:22:41,397 synthtool [DEBUG] > Executing /home/kbuilder/.cache/synthtool/java-iam/synth.py.
On branch autosynth-150
nothing to commit, working tree clean
2020-08-18 18:22:41,532 synthtool [DEBUG] > Ensuring dependencies.
2020-08-18 18:22:41,544 synthtool [DEBUG] > Cloning googleapis.
2020-08-18 18:22:41,913 synthtool [DEBUG] > Generating code for: //google/iam/v1:google-iam-v1-java.
2020-08-18 18:22:42,043 synthtool [ERROR] > Failed executing bazel --max_idle_secs=240 build //google/iam/v1:google-iam-v1-java:

Loading:
Loading: 0 packages loaded
DEBUG: Rule 'com_github_grpc_grpc' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "6a327f757b86469336169580199274ea37fe759489406c4da5d389bee637065d"
DEBUG: Call stack for the definition of repository 'com_github_grpc_grpc' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:113:1
DEBUG: Rule 'com_google_api_gax_java' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "861226f761ca8e9a69eeb5f8be72abfd21d466ef13fdbe73417420878336c63c"
DEBUG: Call stack for the definition of repository 'com_google_api_gax_java' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:145:1
DEBUG: Rule 'io_grpc_grpc_java' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "aff70994303c0055697a8ab00d8b30737d055b1ff42006278a5bda075a1dad4b"
DEBUG: Call stack for the definition of repository 'io_grpc_grpc_java' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/com_google_api_gax_java/repositories.bzl:122:5
 - /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/com_google_api_gax_java/repositories.bzl:60:5
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:160:1
DEBUG: Rule 'com_google_api_codegen' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "73f407fe381ab1ad3192176f2fbc0820d3c4aa62fcafe536685803e6853662a6"
DEBUG: Call stack for the definition of repository 'com_google_api_codegen' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:77:1
DEBUG: Rule 'com_google_protoc_java_resource_names_plugin' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "4b714b35ee04ba90f560ee60e64c7357428efcb6b0f3a298f343f8ec2c6d4a5d"
DEBUG: Call stack for the definition of repository 'com_google_protoc_java_resource_names_plugin' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:177:1
DEBUG: Rule 'gapic_generator_python' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "678d25a7944bae36d4e8192d9bfed697d645fd75ccacbd56b27b1b9ff256b569"
DEBUG: Call stack for the definition of repository 'gapic_generator_python' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:224:1
DEBUG: Rule 'gapic_generator_typescript' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "a7114028de1eb5437d1d5bc1465070341cea4c4394a0bf713b429e8e396dab15"
DEBUG: Call stack for the definition of repository 'gapic_generator_typescript' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:280:1
ERROR: Skipping '//google/iam/v1:google-iam-v1-java': no such target '//google/iam/v1:google-iam-v1-java': target 'google-iam-v1-java' not declared in package 'google/iam/v1' defined by /home/kbuilder/.cache/synthtool/googleapis/google/iam/v1/BUILD.bazel
WARNING: Target pattern parsing failed.
ERROR: no such target '//google/iam/v1:google-iam-v1-java': target 'google-iam-v1-java' not declared in package 'google/iam/v1' defined by /home/kbuilder/.cache/synthtool/googleapis/google/iam/v1/BUILD.bazel
INFO: Elapsed time: 0.121s
INFO: 0 processes.
FAILED: Build did NOT complete successfully (1 packages loaded)
FAILED: Build did NOT complete successfully (1 packages loaded)

Traceback (most recent call last):
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/tmpfs/src/github/synthtool/synthtool/__main__.py", line 102, in <module>
    main()
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 782, in main
    rv = self.invoke(ctx)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/tmpfs/src/github/synthtool/synthtool/__main__.py", line 94, in main
    spec.loader.exec_module(synth_module)  # type: ignore
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/kbuilder/.cache/synthtool/java-iam/synth.py", line 31, in <module>
    bazel_target=f'//google/iam/{version}:google-iam-{version}-java',
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 62, in java_library
    service, version, "java", tar_strip_components=0, **kwargs
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 183, in _generate_code
    shell.run(bazel_run_args)
  File "/tmpfs/src/github/synthtool/synthtool/shell.py", line 39, in run
    raise exc
  File "/tmpfs/src/github/synthtool/synthtool/shell.py", line 33, in run
    encoding="utf-8",
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/subprocess.py", line 438, in run
    output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command '['bazel', '--max_idle_secs=240', 'build', '//google/iam/v1:google-iam-v1-java']' returned non-zero exit status 1.
2020-08-18 18:22:42,101 autosynth [ERROR] > Synthesis failed
2020-08-18 18:22:42,102 autosynth [DEBUG] > Running: git reset --hard HEAD
HEAD is now at 170f36e chore: fix 1.0.0 release versions (#27)
2020-08-18 18:22:42,107 autosynth [DEBUG] > Running: git checkout autosynth
Switched to branch 'autosynth'
2020-08-18 18:22:42,112 autosynth [DEBUG] > Running: git clean -fdx
Removing __pycache__/
Traceback (most recent call last):
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 690, in <module>
    main()
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 539, in main
    return _inner_main(temp_dir)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 670, in _inner_main
    commit_count = synthesize_loop(x, multiple_prs, change_pusher, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 375, in synthesize_loop
    has_changes = toolbox.synthesize_version_in_new_branch(synthesizer, youngest)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 273, in synthesize_version_in_new_branch
    synthesizer.synthesize(synth_log_path, self.environ)
  File "/tmpfs/src/github/synthtool/autosynth/synthesizer.py", line 120, in synthesize
    synth_proc.check_returncode()  # Raise an exception.
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/subprocess.py", line 389, in check_returncode
    self.stderr)
subprocess.CalledProcessError: Command '['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']' returned non-zero exit status 1.

Google internal developers can see the full log here.

Autosynth is still having trouble generating java-iam. :sob:
Here's the output from running synth.py:

  git checkout -b <new-branch-name>

HEAD is now at 1a60ff2 feat: enable obsolete file tracking for nodejs (#728)
2020-08-19 04:58:10,340 autosynth [DEBUG] > Running: git branch -f autosynth-150
2020-08-19 04:58:10,343 autosynth [DEBUG] > Running: git checkout autosynth-150
Switched to branch 'autosynth-150'
2020-08-19 04:58:10,348 autosynth [INFO] > Running synthtool
2020-08-19 04:58:10,348 autosynth [INFO] > ['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']
2020-08-19 04:58:10,348 autosynth [DEBUG] > log_file_path: /tmpfs/src/logs/java-iam/150/sponge_log.log
2020-08-19 04:58:10,350 autosynth [DEBUG] > Running: /tmpfs/src/github/synthtool/env/bin/python3 -m synthtool --metadata synth.metadata synth.py --
2020-08-19 04:58:10,577 synthtool [DEBUG] > Executing /home/kbuilder/.cache/synthtool/java-iam/synth.py.
On branch autosynth-150
nothing to commit, working tree clean
2020-08-19 04:58:10,717 synthtool [DEBUG] > Ensuring dependencies.
2020-08-19 04:58:10,729 synthtool [DEBUG] > Cloning googleapis.
2020-08-19 04:58:11,114 synthtool [DEBUG] > Generating code for: //google/iam/v1:google-iam-v1-java.
2020-08-19 04:58:11,250 synthtool [ERROR] > Failed executing bazel --max_idle_secs=240 build //google/iam/v1:google-iam-v1-java:

Loading:
Loading: 0 packages loaded
DEBUG: Rule 'com_github_grpc_grpc' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "6a327f757b86469336169580199274ea37fe759489406c4da5d389bee637065d"
DEBUG: Call stack for the definition of repository 'com_github_grpc_grpc' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:113:1
DEBUG: Rule 'com_google_api_gax_java' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "861226f761ca8e9a69eeb5f8be72abfd21d466ef13fdbe73417420878336c63c"
DEBUG: Call stack for the definition of repository 'com_google_api_gax_java' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:145:1
DEBUG: Rule 'io_grpc_grpc_java' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "aff70994303c0055697a8ab00d8b30737d055b1ff42006278a5bda075a1dad4b"
DEBUG: Call stack for the definition of repository 'io_grpc_grpc_java' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/com_google_api_gax_java/repositories.bzl:122:5
 - /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/com_google_api_gax_java/repositories.bzl:60:5
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:160:1
DEBUG: Rule 'com_google_api_codegen' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "73f407fe381ab1ad3192176f2fbc0820d3c4aa62fcafe536685803e6853662a6"
DEBUG: Call stack for the definition of repository 'com_google_api_codegen' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:77:1
DEBUG: Rule 'com_google_protoc_java_resource_names_plugin' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "4b714b35ee04ba90f560ee60e64c7357428efcb6b0f3a298f343f8ec2c6d4a5d"
DEBUG: Call stack for the definition of repository 'com_google_protoc_java_resource_names_plugin' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:177:1
DEBUG: Rule 'gapic_generator_python' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "678d25a7944bae36d4e8192d9bfed697d645fd75ccacbd56b27b1b9ff256b569"
DEBUG: Call stack for the definition of repository 'gapic_generator_python' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:224:1
DEBUG: Rule 'gapic_generator_typescript' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "a7114028de1eb5437d1d5bc1465070341cea4c4394a0bf713b429e8e396dab15"
DEBUG: Call stack for the definition of repository 'gapic_generator_typescript' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:280:1
ERROR: Skipping '//google/iam/v1:google-iam-v1-java': no such target '//google/iam/v1:google-iam-v1-java': target 'google-iam-v1-java' not declared in package 'google/iam/v1' defined by /home/kbuilder/.cache/synthtool/googleapis/google/iam/v1/BUILD.bazel
WARNING: Target pattern parsing failed.
ERROR: no such target '//google/iam/v1:google-iam-v1-java': target 'google-iam-v1-java' not declared in package 'google/iam/v1' defined by /home/kbuilder/.cache/synthtool/googleapis/google/iam/v1/BUILD.bazel
INFO: Elapsed time: 0.127s
INFO: 0 processes.
FAILED: Build did NOT complete successfully (1 packages loaded)
FAILED: Build did NOT complete successfully (1 packages loaded)

Traceback (most recent call last):
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/tmpfs/src/github/synthtool/synthtool/__main__.py", line 102, in <module>
    main()
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 782, in main
    rv = self.invoke(ctx)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/tmpfs/src/github/synthtool/synthtool/__main__.py", line 94, in main
    spec.loader.exec_module(synth_module)  # type: ignore
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/kbuilder/.cache/synthtool/java-iam/synth.py", line 31, in <module>
    bazel_target=f'//google/iam/{version}:google-iam-{version}-java',
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 62, in java_library
    service, version, "java", tar_strip_components=0, **kwargs
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 183, in _generate_code
    shell.run(bazel_run_args)
  File "/tmpfs/src/github/synthtool/synthtool/shell.py", line 39, in run
    raise exc
  File "/tmpfs/src/github/synthtool/synthtool/shell.py", line 33, in run
    encoding="utf-8",
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/subprocess.py", line 438, in run
    output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command '['bazel', '--max_idle_secs=240', 'build', '//google/iam/v1:google-iam-v1-java']' returned non-zero exit status 1.
2020-08-19 04:58:11,322 autosynth [ERROR] > Synthesis failed
2020-08-19 04:58:11,323 autosynth [DEBUG] > Running: git reset --hard HEAD
HEAD is now at 170f36e chore: fix 1.0.0 release versions (#27)
2020-08-19 04:58:11,328 autosynth [DEBUG] > Running: git checkout autosynth
Switched to branch 'autosynth'
2020-08-19 04:58:11,333 autosynth [DEBUG] > Running: git clean -fdx
Removing __pycache__/
Traceback (most recent call last):
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 690, in <module>
    main()
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 539, in main
    return _inner_main(temp_dir)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 670, in _inner_main
    commit_count = synthesize_loop(x, multiple_prs, change_pusher, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 375, in synthesize_loop
    has_changes = toolbox.synthesize_version_in_new_branch(synthesizer, youngest)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 273, in synthesize_version_in_new_branch
    synthesizer.synthesize(synth_log_path, self.environ)
  File "/tmpfs/src/github/synthtool/autosynth/synthesizer.py", line 120, in synthesize
    synth_proc.check_returncode()  # Raise an exception.
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/subprocess.py", line 389, in check_returncode
    self.stderr)
subprocess.CalledProcessError: Command '['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']' returned non-zero exit status 1.

Google internal developers can see the full log here.

Autosynth is still having trouble generating java-iam. :sob:
Here's the output from running synth.py:
m/v1:google-iam-v1-java:

Loading:
Loading: 0 packages loaded
Loading: 0 packages loaded
Loading: 0 packages loaded
INFO: SHA256 (https://github.com/grpc/grpc/archive/v1.30.2.zip) = 6a327f757b86469336169580199274ea37fe759489406c4da5d389bee637065d
Loading: 0 packages loaded
DEBUG: Rule 'com_github_grpc_grpc' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "6a327f757b86469336169580199274ea37fe759489406c4da5d389bee637065d"
DEBUG: Call stack for the definition of repository 'com_github_grpc_grpc' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:113:1
INFO: SHA256 (https://github.com/googleapis/gax-java/archive/v1.57.2.zip) = 861226f761ca8e9a69eeb5f8be72abfd21d466ef13fdbe73417420878336c63c
DEBUG: Rule 'com_google_api_gax_java' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "861226f761ca8e9a69eeb5f8be72abfd21d466ef13fdbe73417420878336c63c"
DEBUG: Call stack for the definition of repository 'com_google_api_gax_java' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:145:1
Loading: 0 packages loaded
INFO: SHA256 (https://github.com/grpc/grpc-java/archive/v1.30.0.zip) = aff70994303c0055697a8ab00d8b30737d055b1ff42006278a5bda075a1dad4b
DEBUG: Rule 'io_grpc_grpc_java' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "aff70994303c0055697a8ab00d8b30737d055b1ff42006278a5bda075a1dad4b"
DEBUG: Call stack for the definition of repository 'io_grpc_grpc_java' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/com_google_api_gax_java/repositories.bzl:122:5
 - /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/com_google_api_gax_java/repositories.bzl:60:5
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:160:1
Loading: 0 packages loaded
INFO: SHA256 (https://github.com/googleapis/gapic-generator/archive/v2.4.5.zip) = 73f407fe381ab1ad3192176f2fbc0820d3c4aa62fcafe536685803e6853662a6
DEBUG: Rule 'com_google_api_codegen' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "73f407fe381ab1ad3192176f2fbc0820d3c4aa62fcafe536685803e6853662a6"
DEBUG: Call stack for the definition of repository 'com_google_api_codegen' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:77:1
Loading: 0 packages loaded
INFO: SHA256 (https://github.com/googleapis/protoc-java-resource-names-plugin/archive/8d749cb5b7aa2734656e1ad36ceda92894f33153.zip) = 4b714b35ee04ba90f560ee60e64c7357428efcb6b0f3a298f343f8ec2c6d4a5d
DEBUG: Rule 'com_google_protoc_java_resource_names_plugin' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "4b714b35ee04ba90f560ee60e64c7357428efcb6b0f3a298f343f8ec2c6d4a5d"
DEBUG: Call stack for the definition of repository 'com_google_protoc_java_resource_names_plugin' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:177:1
INFO: SHA256 (https://github.com/googleapis/gapic-generator-python/archive/v0.32.0.zip) = 678d25a7944bae36d4e8192d9bfed697d645fd75ccacbd56b27b1b9ff256b569
DEBUG: Rule 'gapic_generator_python' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "678d25a7944bae36d4e8192d9bfed697d645fd75ccacbd56b27b1b9ff256b569"
DEBUG: Call stack for the definition of repository 'gapic_generator_python' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:224:1
Loading: 0 packages loaded
Loading: 0 packages loaded
INFO: SHA256 (https://github.com/googleapis/gapic-generator-typescript/archive/v1.0.8.tar.gz) = a7114028de1eb5437d1d5bc1465070341cea4c4394a0bf713b429e8e396dab15
DEBUG: Rule 'gapic_generator_typescript' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "a7114028de1eb5437d1d5bc1465070341cea4c4394a0bf713b429e8e396dab15"
DEBUG: Call stack for the definition of repository 'gapic_generator_typescript' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:280:1
ERROR: Skipping '//google/iam/v1:google-iam-v1-java': no such target '//google/iam/v1:google-iam-v1-java': target 'google-iam-v1-java' not declared in package 'google/iam/v1' defined by /home/kbuilder/.cache/synthtool/googleapis/google/iam/v1/BUILD.bazel
WARNING: Target pattern parsing failed.
ERROR: no such target '//google/iam/v1:google-iam-v1-java': target 'google-iam-v1-java' not declared in package 'google/iam/v1' defined by /home/kbuilder/.cache/synthtool/googleapis/google/iam/v1/BUILD.bazel
INFO: Elapsed time: 21.228s
INFO: 0 processes.
FAILED: Build did NOT complete successfully (1 packages loaded)
FAILED: Build did NOT complete successfully (1 packages loaded)

Traceback (most recent call last):
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/tmpfs/src/github/synthtool/synthtool/__main__.py", line 102, in <module>
    main()
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 782, in main
    rv = self.invoke(ctx)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/tmpfs/src/github/synthtool/synthtool/__main__.py", line 94, in main
    spec.loader.exec_module(synth_module)  # type: ignore
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/kbuilder/.cache/synthtool/java-iam/synth.py", line 31, in <module>
    bazel_target=f'//google/iam/{version}:google-iam-{version}-java',
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 62, in java_library
    service, version, "java", tar_strip_components=0, **kwargs
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 183, in _generate_code
    shell.run(bazel_run_args)
  File "/tmpfs/src/github/synthtool/synthtool/shell.py", line 39, in run
    raise exc
  File "/tmpfs/src/github/synthtool/synthtool/shell.py", line 33, in run
    encoding="utf-8",
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/subprocess.py", line 438, in run
    output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command '['bazel', '--max_idle_secs=240', 'build', '//google/iam/v1:google-iam-v1-java']' returned non-zero exit status 1.
2020-08-19 22:32:02,709 autosynth [ERROR] > Synthesis failed
2020-08-19 22:32:02,709 autosynth [DEBUG] > Running: git reset --hard HEAD
HEAD is now at 170f36e chore: fix 1.0.0 release versions (#27)
2020-08-19 22:32:02,715 autosynth [DEBUG] > Running: git checkout autosynth
Switched to branch 'autosynth'
2020-08-19 22:32:02,720 autosynth [DEBUG] > Running: git clean -fdx
Removing __pycache__/
Traceback (most recent call last):
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 690, in <module>
    main()
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 539, in main
    return _inner_main(temp_dir)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 670, in _inner_main
    commit_count = synthesize_loop(x, multiple_prs, change_pusher, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 375, in synthesize_loop
    has_changes = toolbox.synthesize_version_in_new_branch(synthesizer, youngest)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 273, in synthesize_version_in_new_branch
    synthesizer.synthesize(synth_log_path, self.environ)
  File "/tmpfs/src/github/synthtool/autosynth/synthesizer.py", line 120, in synthesize
    synth_proc.check_returncode()  # Raise an exception.
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/subprocess.py", line 389, in check_returncode
    self.stderr)
subprocess.CalledProcessError: Command '['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']' returned non-zero exit status 1.

Google internal developers can see the full log here.

Autosynth is still having trouble generating java-iam. :sob:
Here's the output from running synth.py:
new-branch-name>

HEAD is now at 9602086 chore(java_templates): stop running pmd/spotbugs checks for samples (#730)
2020-08-20 04:44:24,316 autosynth [DEBUG] > Running: git branch -f autosynth-151
2020-08-20 04:44:24,319 autosynth [DEBUG] > Running: git checkout autosynth-151
Switched to branch 'autosynth-151'
2020-08-20 04:44:24,323 autosynth [INFO] > Running synthtool
2020-08-20 04:44:24,324 autosynth [INFO] > ['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']
2020-08-20 04:44:24,324 autosynth [DEBUG] > log_file_path: /tmpfs/src/logs/java-iam/151/sponge_log.log
2020-08-20 04:44:24,326 autosynth [DEBUG] > Running: /tmpfs/src/github/synthtool/env/bin/python3 -m synthtool --metadata synth.metadata synth.py --
2020-08-20 04:44:24,533 synthtool [DEBUG] > Executing /home/kbuilder/.cache/synthtool/java-iam/synth.py.
On branch autosynth-151
nothing to commit, working tree clean
2020-08-20 04:44:24,661 synthtool [DEBUG] > Ensuring dependencies.
2020-08-20 04:44:24,672 synthtool [DEBUG] > Cloning googleapis.
2020-08-20 04:44:25,321 synthtool [DEBUG] > Generating code for: //google/iam/v1:google-iam-v1-java.
2020-08-20 04:44:25,444 synthtool [ERROR] > Failed executing bazel --max_idle_secs=240 build //google/iam/v1:google-iam-v1-java:

Loading:
Loading: 0 packages loaded
DEBUG: Rule 'com_github_grpc_grpc' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "6a327f757b86469336169580199274ea37fe759489406c4da5d389bee637065d"
DEBUG: Call stack for the definition of repository 'com_github_grpc_grpc' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:113:1
DEBUG: Rule 'com_google_api_gax_java' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "861226f761ca8e9a69eeb5f8be72abfd21d466ef13fdbe73417420878336c63c"
DEBUG: Call stack for the definition of repository 'com_google_api_gax_java' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:145:1
DEBUG: Rule 'io_grpc_grpc_java' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "aff70994303c0055697a8ab00d8b30737d055b1ff42006278a5bda075a1dad4b"
DEBUG: Call stack for the definition of repository 'io_grpc_grpc_java' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/com_google_api_gax_java/repositories.bzl:122:5
 - /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/com_google_api_gax_java/repositories.bzl:60:5
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:160:1
DEBUG: Rule 'com_google_api_codegen' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "73f407fe381ab1ad3192176f2fbc0820d3c4aa62fcafe536685803e6853662a6"
DEBUG: Call stack for the definition of repository 'com_google_api_codegen' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:77:1
DEBUG: Rule 'com_google_protoc_java_resource_names_plugin' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "4b714b35ee04ba90f560ee60e64c7357428efcb6b0f3a298f343f8ec2c6d4a5d"
DEBUG: Call stack for the definition of repository 'com_google_protoc_java_resource_names_plugin' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:177:1
DEBUG: Rule 'gapic_generator_python' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "678d25a7944bae36d4e8192d9bfed697d645fd75ccacbd56b27b1b9ff256b569"
DEBUG: Call stack for the definition of repository 'gapic_generator_python' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:224:1
DEBUG: Rule 'gapic_generator_typescript' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "a7114028de1eb5437d1d5bc1465070341cea4c4394a0bf713b429e8e396dab15"
DEBUG: Call stack for the definition of repository 'gapic_generator_typescript' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:280:1
ERROR: Skipping '//google/iam/v1:google-iam-v1-java': no such target '//google/iam/v1:google-iam-v1-java': target 'google-iam-v1-java' not declared in package 'google/iam/v1' defined by /home/kbuilder/.cache/synthtool/googleapis/google/iam/v1/BUILD.bazel
WARNING: Target pattern parsing failed.
ERROR: no such target '//google/iam/v1:google-iam-v1-java': target 'google-iam-v1-java' not declared in package 'google/iam/v1' defined by /home/kbuilder/.cache/synthtool/googleapis/google/iam/v1/BUILD.bazel
INFO: Elapsed time: 0.115s
INFO: 0 processes.
FAILED: Build did NOT complete successfully (1 packages loaded)
FAILED: Build did NOT complete successfully (1 packages loaded)

Traceback (most recent call last):
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/tmpfs/src/github/synthtool/synthtool/__main__.py", line 102, in <module>
    main()
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 782, in main
    rv = self.invoke(ctx)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/tmpfs/src/github/synthtool/synthtool/__main__.py", line 94, in main
    spec.loader.exec_module(synth_module)  # type: ignore
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/kbuilder/.cache/synthtool/java-iam/synth.py", line 31, in <module>
    bazel_target=f'//google/iam/{version}:google-iam-{version}-java',
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 62, in java_library
    service, version, "java", tar_strip_components=0, **kwargs
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 183, in _generate_code
    shell.run(bazel_run_args)
  File "/tmpfs/src/github/synthtool/synthtool/shell.py", line 39, in run
    raise exc
  File "/tmpfs/src/github/synthtool/synthtool/shell.py", line 33, in run
    encoding="utf-8",
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/subprocess.py", line 438, in run
    output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command '['bazel', '--max_idle_secs=240', 'build', '//google/iam/v1:google-iam-v1-java']' returned non-zero exit status 1.
2020-08-20 04:44:25,501 autosynth [ERROR] > Synthesis failed
2020-08-20 04:44:25,502 autosynth [DEBUG] > Running: git reset --hard HEAD
HEAD is now at 170f36e chore: fix 1.0.0 release versions (#27)
2020-08-20 04:44:25,507 autosynth [DEBUG] > Running: git checkout autosynth
Switched to branch 'autosynth'
2020-08-20 04:44:25,511 autosynth [DEBUG] > Running: git clean -fdx
Removing __pycache__/
Traceback (most recent call last):
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 690, in <module>
    main()
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 539, in main
    return _inner_main(temp_dir)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 670, in _inner_main
    commit_count = synthesize_loop(x, multiple_prs, change_pusher, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 375, in synthesize_loop
    has_changes = toolbox.synthesize_version_in_new_branch(synthesizer, youngest)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 273, in synthesize_version_in_new_branch
    synthesizer.synthesize(synth_log_path, self.environ)
  File "/tmpfs/src/github/synthtool/autosynth/synthesizer.py", line 120, in synthesize
    synth_proc.check_returncode()  # Raise an exception.
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/subprocess.py", line 389, in check_returncode
    self.stderr)
subprocess.CalledProcessError: Command '['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']' returned non-zero exit status 1.

Google internal developers can see the full log here.

Autosynth is still having trouble generating java-iam. :sob:
Here's the output from running synth.py:
out -b <new-branch-name>

HEAD is now at 2e85c10 fix(python_samples): README link fix, enforce samples=True  (#732)
2020-08-20 16:50:45,515 autosynth [DEBUG] > Running: git branch -f autosynth-152
2020-08-20 16:50:45,518 autosynth [DEBUG] > Running: git checkout autosynth-152
Switched to branch 'autosynth-152'
2020-08-20 16:50:45,522 autosynth [INFO] > Running synthtool
2020-08-20 16:50:45,522 autosynth [INFO] > ['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']
2020-08-20 16:50:45,523 autosynth [DEBUG] > log_file_path: /tmpfs/src/logs/java-iam/152/sponge_log.log
2020-08-20 16:50:45,524 autosynth [DEBUG] > Running: /tmpfs/src/github/synthtool/env/bin/python3 -m synthtool --metadata synth.metadata synth.py --
2020-08-20 16:50:45,745 synthtool [DEBUG] > Executing /home/kbuilder/.cache/synthtool/java-iam/synth.py.
On branch autosynth-152
nothing to commit, working tree clean
2020-08-20 16:50:45,881 synthtool [DEBUG] > Ensuring dependencies.
2020-08-20 16:50:45,893 synthtool [DEBUG] > Cloning googleapis.
2020-08-20 16:50:46,279 synthtool [DEBUG] > Generating code for: //google/iam/v1:google-iam-v1-java.
2020-08-20 16:50:46,409 synthtool [ERROR] > Failed executing bazel --max_idle_secs=240 build //google/iam/v1:google-iam-v1-java:

Loading:
Loading: 0 packages loaded
DEBUG: Rule 'com_github_grpc_grpc' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "6a327f757b86469336169580199274ea37fe759489406c4da5d389bee637065d"
DEBUG: Call stack for the definition of repository 'com_github_grpc_grpc' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:113:1
DEBUG: Rule 'com_google_api_gax_java' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "861226f761ca8e9a69eeb5f8be72abfd21d466ef13fdbe73417420878336c63c"
DEBUG: Call stack for the definition of repository 'com_google_api_gax_java' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:145:1
DEBUG: Rule 'io_grpc_grpc_java' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "aff70994303c0055697a8ab00d8b30737d055b1ff42006278a5bda075a1dad4b"
DEBUG: Call stack for the definition of repository 'io_grpc_grpc_java' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/com_google_api_gax_java/repositories.bzl:122:5
 - /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/com_google_api_gax_java/repositories.bzl:60:5
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:160:1
DEBUG: Rule 'com_google_api_codegen' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "73f407fe381ab1ad3192176f2fbc0820d3c4aa62fcafe536685803e6853662a6"
DEBUG: Call stack for the definition of repository 'com_google_api_codegen' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:77:1
DEBUG: Rule 'com_google_protoc_java_resource_names_plugin' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "4b714b35ee04ba90f560ee60e64c7357428efcb6b0f3a298f343f8ec2c6d4a5d"
DEBUG: Call stack for the definition of repository 'com_google_protoc_java_resource_names_plugin' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:177:1
DEBUG: Rule 'gapic_generator_python' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "678d25a7944bae36d4e8192d9bfed697d645fd75ccacbd56b27b1b9ff256b569"
DEBUG: Call stack for the definition of repository 'gapic_generator_python' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:224:1
DEBUG: Rule 'gapic_generator_typescript' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "a7114028de1eb5437d1d5bc1465070341cea4c4394a0bf713b429e8e396dab15"
DEBUG: Call stack for the definition of repository 'gapic_generator_typescript' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:280:1
ERROR: Skipping '//google/iam/v1:google-iam-v1-java': no such target '//google/iam/v1:google-iam-v1-java': target 'google-iam-v1-java' not declared in package 'google/iam/v1' defined by /home/kbuilder/.cache/synthtool/googleapis/google/iam/v1/BUILD.bazel
WARNING: Target pattern parsing failed.
ERROR: no such target '//google/iam/v1:google-iam-v1-java': target 'google-iam-v1-java' not declared in package 'google/iam/v1' defined by /home/kbuilder/.cache/synthtool/googleapis/google/iam/v1/BUILD.bazel
INFO: Elapsed time: 0.121s
INFO: 0 processes.
FAILED: Build did NOT complete successfully (1 packages loaded)
FAILED: Build did NOT complete successfully (1 packages loaded)

Traceback (most recent call last):
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/tmpfs/src/github/synthtool/synthtool/__main__.py", line 102, in <module>
    main()
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 782, in main
    rv = self.invoke(ctx)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/tmpfs/src/github/synthtool/synthtool/__main__.py", line 94, in main
    spec.loader.exec_module(synth_module)  # type: ignore
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/kbuilder/.cache/synthtool/java-iam/synth.py", line 31, in <module>
    bazel_target=f'//google/iam/{version}:google-iam-{version}-java',
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 62, in java_library
    service, version, "java", tar_strip_components=0, **kwargs
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 183, in _generate_code
    shell.run(bazel_run_args)
  File "/tmpfs/src/github/synthtool/synthtool/shell.py", line 39, in run
    raise exc
  File "/tmpfs/src/github/synthtool/synthtool/shell.py", line 33, in run
    encoding="utf-8",
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/subprocess.py", line 438, in run
    output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command '['bazel', '--max_idle_secs=240', 'build', '//google/iam/v1:google-iam-v1-java']' returned non-zero exit status 1.
2020-08-20 16:50:46,472 autosynth [ERROR] > Synthesis failed
2020-08-20 16:50:46,473 autosynth [DEBUG] > Running: git reset --hard HEAD
HEAD is now at 170f36e chore: fix 1.0.0 release versions (#27)
2020-08-20 16:50:46,478 autosynth [DEBUG] > Running: git checkout autosynth
Switched to branch 'autosynth'
2020-08-20 16:50:46,483 autosynth [DEBUG] > Running: git clean -fdx
Removing __pycache__/
Traceback (most recent call last):
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 690, in <module>
    main()
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 539, in main
    return _inner_main(temp_dir)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 670, in _inner_main
    commit_count = synthesize_loop(x, multiple_prs, change_pusher, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 375, in synthesize_loop
    has_changes = toolbox.synthesize_version_in_new_branch(synthesizer, youngest)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 273, in synthesize_version_in_new_branch
    synthesizer.synthesize(synth_log_path, self.environ)
  File "/tmpfs/src/github/synthtool/autosynth/synthesizer.py", line 120, in synthesize
    synth_proc.check_returncode()  # Raise an exception.
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/subprocess.py", line 389, in check_returncode
    self.stderr)
subprocess.CalledProcessError: Command '['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']' returned non-zero exit status 1.

Google internal developers can see the full log here.

Autosynth is still having trouble generating java-iam. :sob:
Here's the output from running synth.py:
ckout -b <new-branch-name>

HEAD is now at 05de3e1 fix: move system and samples test from Node 10 to Node 12 (#725)
2020-08-23 15:48:00,055 autosynth [DEBUG] > Running: git branch -f autosynth-153
2020-08-23 15:48:00,059 autosynth [DEBUG] > Running: git checkout autosynth-153
Switched to branch 'autosynth-153'
2020-08-23 15:48:00,063 autosynth [INFO] > Running synthtool
2020-08-23 15:48:00,063 autosynth [INFO] > ['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']
2020-08-23 15:48:00,063 autosynth [DEBUG] > log_file_path: /tmpfs/src/logs/java-iam/153/sponge_log.log
2020-08-23 15:48:00,065 autosynth [DEBUG] > Running: /tmpfs/src/github/synthtool/env/bin/python3 -m synthtool --metadata synth.metadata synth.py --
2020-08-23 15:48:00,304 synthtool [DEBUG] > Executing /home/kbuilder/.cache/synthtool/java-iam/synth.py.
On branch autosynth-153
nothing to commit, working tree clean
2020-08-23 15:48:00,448 synthtool [DEBUG] > Ensuring dependencies.
2020-08-23 15:48:00,459 synthtool [DEBUG] > Cloning googleapis.
2020-08-23 15:48:01,131 synthtool [DEBUG] > Generating code for: //google/iam/v1:google-iam-v1-java.
2020-08-23 15:48:01,264 synthtool [ERROR] > Failed executing bazel --max_idle_secs=240 build //google/iam/v1:google-iam-v1-java:

Loading:
Loading: 0 packages loaded
DEBUG: Rule 'com_github_grpc_grpc' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "6a327f757b86469336169580199274ea37fe759489406c4da5d389bee637065d"
DEBUG: Call stack for the definition of repository 'com_github_grpc_grpc' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:113:1
DEBUG: Rule 'com_google_api_gax_java' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "861226f761ca8e9a69eeb5f8be72abfd21d466ef13fdbe73417420878336c63c"
DEBUG: Call stack for the definition of repository 'com_google_api_gax_java' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:145:1
DEBUG: Rule 'io_grpc_grpc_java' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "aff70994303c0055697a8ab00d8b30737d055b1ff42006278a5bda075a1dad4b"
DEBUG: Call stack for the definition of repository 'io_grpc_grpc_java' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/com_google_api_gax_java/repositories.bzl:122:5
 - /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/com_google_api_gax_java/repositories.bzl:60:5
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:160:1
DEBUG: Rule 'com_google_api_codegen' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "73f407fe381ab1ad3192176f2fbc0820d3c4aa62fcafe536685803e6853662a6"
DEBUG: Call stack for the definition of repository 'com_google_api_codegen' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:77:1
DEBUG: Rule 'com_google_protoc_java_resource_names_plugin' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "4b714b35ee04ba90f560ee60e64c7357428efcb6b0f3a298f343f8ec2c6d4a5d"
DEBUG: Call stack for the definition of repository 'com_google_protoc_java_resource_names_plugin' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:177:1
DEBUG: Rule 'gapic_generator_python' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "678d25a7944bae36d4e8192d9bfed697d645fd75ccacbd56b27b1b9ff256b569"
DEBUG: Call stack for the definition of repository 'gapic_generator_python' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:224:1
DEBUG: Rule 'gapic_generator_typescript' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "a7114028de1eb5437d1d5bc1465070341cea4c4394a0bf713b429e8e396dab15"
DEBUG: Call stack for the definition of repository 'gapic_generator_typescript' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:280:1
ERROR: Skipping '//google/iam/v1:google-iam-v1-java': no such target '//google/iam/v1:google-iam-v1-java': target 'google-iam-v1-java' not declared in package 'google/iam/v1' defined by /home/kbuilder/.cache/synthtool/googleapis/google/iam/v1/BUILD.bazel
WARNING: Target pattern parsing failed.
ERROR: no such target '//google/iam/v1:google-iam-v1-java': target 'google-iam-v1-java' not declared in package 'google/iam/v1' defined by /home/kbuilder/.cache/synthtool/googleapis/google/iam/v1/BUILD.bazel
INFO: Elapsed time: 0.124s
INFO: 0 processes.
FAILED: Build did NOT complete successfully (1 packages loaded)
FAILED: Build did NOT complete successfully (1 packages loaded)

Traceback (most recent call last):
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/tmpfs/src/github/synthtool/synthtool/__main__.py", line 102, in <module>
    main()
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 782, in main
    rv = self.invoke(ctx)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/tmpfs/src/github/synthtool/synthtool/__main__.py", line 94, in main
    spec.loader.exec_module(synth_module)  # type: ignore
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/kbuilder/.cache/synthtool/java-iam/synth.py", line 31, in <module>
    bazel_target=f'//google/iam/{version}:google-iam-{version}-java',
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 62, in java_library
    service, version, "java", tar_strip_components=0, **kwargs
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 183, in _generate_code
    shell.run(bazel_run_args)
  File "/tmpfs/src/github/synthtool/synthtool/shell.py", line 39, in run
    raise exc
  File "/tmpfs/src/github/synthtool/synthtool/shell.py", line 33, in run
    encoding="utf-8",
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/subprocess.py", line 438, in run
    output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command '['bazel', '--max_idle_secs=240', 'build', '//google/iam/v1:google-iam-v1-java']' returned non-zero exit status 1.
2020-08-23 15:48:01,331 autosynth [ERROR] > Synthesis failed
2020-08-23 15:48:01,331 autosynth [DEBUG] > Running: git reset --hard HEAD
HEAD is now at 170f36e chore: fix 1.0.0 release versions (#27)
2020-08-23 15:48:01,336 autosynth [DEBUG] > Running: git checkout autosynth
Switched to branch 'autosynth'
2020-08-23 15:48:01,341 autosynth [DEBUG] > Running: git clean -fdx
Removing __pycache__/
Traceback (most recent call last):
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 690, in <module>
    main()
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 539, in main
    return _inner_main(temp_dir)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 670, in _inner_main
    commit_count = synthesize_loop(x, multiple_prs, change_pusher, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 375, in synthesize_loop
    has_changes = toolbox.synthesize_version_in_new_branch(synthesizer, youngest)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 273, in synthesize_version_in_new_branch
    synthesizer.synthesize(synth_log_path, self.environ)
  File "/tmpfs/src/github/synthtool/autosynth/synthesizer.py", line 120, in synthesize
    synth_proc.check_returncode()  # Raise an exception.
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/subprocess.py", line 389, in check_returncode
    self.stderr)
subprocess.CalledProcessError: Command '['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']' returned non-zero exit status 1.

Google internal developers can see the full log here.

Autosynth is still having trouble generating java-iam. :sob:
Here's the output from running synth.py:
ckout -b <new-branch-name>

HEAD is now at 05de3e1 fix: move system and samples test from Node 10 to Node 12 (#725)
2020-08-24 03:30:13,093 autosynth [DEBUG] > Running: git branch -f autosynth-153
2020-08-24 03:30:13,099 autosynth [DEBUG] > Running: git checkout autosynth-153
Switched to branch 'autosynth-153'
2020-08-24 03:30:13,107 autosynth [INFO] > Running synthtool
2020-08-24 03:30:13,108 autosynth [INFO] > ['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']
2020-08-24 03:30:13,108 autosynth [DEBUG] > log_file_path: /tmpfs/src/logs/java-iam/153/sponge_log.log
2020-08-24 03:30:13,113 autosynth [DEBUG] > Running: /tmpfs/src/github/synthtool/env/bin/python3 -m synthtool --metadata synth.metadata synth.py --
2020-08-24 03:30:13,403 synthtool [DEBUG] > Executing /home/kbuilder/.cache/synthtool/java-iam/synth.py.
On branch autosynth-153
nothing to commit, working tree clean
2020-08-24 03:30:13,579 synthtool [DEBUG] > Ensuring dependencies.
2020-08-24 03:30:13,598 synthtool [DEBUG] > Cloning googleapis.
2020-08-24 03:30:14,433 synthtool [DEBUG] > Generating code for: //google/iam/v1:google-iam-v1-java.
2020-08-24 03:30:14,631 synthtool [ERROR] > Failed executing bazel --max_idle_secs=240 build //google/iam/v1:google-iam-v1-java:

Loading:
Loading: 0 packages loaded
DEBUG: Rule 'com_github_grpc_grpc' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "6a327f757b86469336169580199274ea37fe759489406c4da5d389bee637065d"
DEBUG: Call stack for the definition of repository 'com_github_grpc_grpc' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:113:1
DEBUG: Rule 'com_google_api_gax_java' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "861226f761ca8e9a69eeb5f8be72abfd21d466ef13fdbe73417420878336c63c"
DEBUG: Call stack for the definition of repository 'com_google_api_gax_java' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:145:1
DEBUG: Rule 'io_grpc_grpc_java' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "aff70994303c0055697a8ab00d8b30737d055b1ff42006278a5bda075a1dad4b"
DEBUG: Call stack for the definition of repository 'io_grpc_grpc_java' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/com_google_api_gax_java/repositories.bzl:122:5
 - /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/com_google_api_gax_java/repositories.bzl:60:5
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:160:1
DEBUG: Rule 'com_google_api_codegen' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "73f407fe381ab1ad3192176f2fbc0820d3c4aa62fcafe536685803e6853662a6"
DEBUG: Call stack for the definition of repository 'com_google_api_codegen' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:77:1
DEBUG: Rule 'com_google_protoc_java_resource_names_plugin' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "4b714b35ee04ba90f560ee60e64c7357428efcb6b0f3a298f343f8ec2c6d4a5d"
DEBUG: Call stack for the definition of repository 'com_google_protoc_java_resource_names_plugin' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:177:1
DEBUG: Rule 'gapic_generator_python' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "678d25a7944bae36d4e8192d9bfed697d645fd75ccacbd56b27b1b9ff256b569"
DEBUG: Call stack for the definition of repository 'gapic_generator_python' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:224:1
DEBUG: Rule 'gapic_generator_typescript' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "a7114028de1eb5437d1d5bc1465070341cea4c4394a0bf713b429e8e396dab15"
DEBUG: Call stack for the definition of repository 'gapic_generator_typescript' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:280:1
ERROR: Skipping '//google/iam/v1:google-iam-v1-java': no such target '//google/iam/v1:google-iam-v1-java': target 'google-iam-v1-java' not declared in package 'google/iam/v1' defined by /home/kbuilder/.cache/synthtool/googleapis/google/iam/v1/BUILD.bazel
WARNING: Target pattern parsing failed.
ERROR: no such target '//google/iam/v1:google-iam-v1-java': target 'google-iam-v1-java' not declared in package 'google/iam/v1' defined by /home/kbuilder/.cache/synthtool/googleapis/google/iam/v1/BUILD.bazel
INFO: Elapsed time: 0.185s
INFO: 0 processes.
FAILED: Build did NOT complete successfully (1 packages loaded)
FAILED: Build did NOT complete successfully (1 packages loaded)

Traceback (most recent call last):
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/tmpfs/src/github/synthtool/synthtool/__main__.py", line 102, in <module>
    main()
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 782, in main
    rv = self.invoke(ctx)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/tmpfs/src/github/synthtool/synthtool/__main__.py", line 94, in main
    spec.loader.exec_module(synth_module)  # type: ignore
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/kbuilder/.cache/synthtool/java-iam/synth.py", line 31, in <module>
    bazel_target=f'//google/iam/{version}:google-iam-{version}-java',
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 62, in java_library
    service, version, "java", tar_strip_components=0, **kwargs
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 183, in _generate_code
    shell.run(bazel_run_args)
  File "/tmpfs/src/github/synthtool/synthtool/shell.py", line 39, in run
    raise exc
  File "/tmpfs/src/github/synthtool/synthtool/shell.py", line 33, in run
    encoding="utf-8",
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/subprocess.py", line 438, in run
    output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command '['bazel', '--max_idle_secs=240', 'build', '//google/iam/v1:google-iam-v1-java']' returned non-zero exit status 1.
2020-08-24 03:30:14,715 autosynth [ERROR] > Synthesis failed
2020-08-24 03:30:14,716 autosynth [DEBUG] > Running: git reset --hard HEAD
HEAD is now at 170f36e chore: fix 1.0.0 release versions (#27)
2020-08-24 03:30:14,722 autosynth [DEBUG] > Running: git checkout autosynth
Switched to branch 'autosynth'
2020-08-24 03:30:14,730 autosynth [DEBUG] > Running: git clean -fdx
Removing __pycache__/
Traceback (most recent call last):
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 690, in <module>
    main()
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 539, in main
    return _inner_main(temp_dir)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 670, in _inner_main
    commit_count = synthesize_loop(x, multiple_prs, change_pusher, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 375, in synthesize_loop
    has_changes = toolbox.synthesize_version_in_new_branch(synthesizer, youngest)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 273, in synthesize_version_in_new_branch
    synthesizer.synthesize(synth_log_path, self.environ)
  File "/tmpfs/src/github/synthtool/autosynth/synthesizer.py", line 120, in synthesize
    synth_proc.check_returncode()  # Raise an exception.
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/subprocess.py", line 389, in check_returncode
    self.stderr)
subprocess.CalledProcessError: Command '['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']' returned non-zero exit status 1.

Google internal developers can see the full log here.

Autosynth is still having trouble generating java-iam. :sob:
Here's the output from running synth.py:
ckout -b <new-branch-name>

HEAD is now at 05de3e1 fix: move system and samples test from Node 10 to Node 12 (#725)
2020-08-24 16:01:18,565 autosynth [DEBUG] > Running: git branch -f autosynth-153
2020-08-24 16:01:18,570 autosynth [DEBUG] > Running: git checkout autosynth-153
Switched to branch 'autosynth-153'
2020-08-24 16:01:18,576 autosynth [INFO] > Running synthtool
2020-08-24 16:01:18,576 autosynth [INFO] > ['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']
2020-08-24 16:01:18,576 autosynth [DEBUG] > log_file_path: /tmpfs/src/logs/java-iam/153/sponge_log.log
2020-08-24 16:01:18,579 autosynth [DEBUG] > Running: /tmpfs/src/github/synthtool/env/bin/python3 -m synthtool --metadata synth.metadata synth.py --
2020-08-24 16:01:18,815 synthtool [DEBUG] > Executing /home/kbuilder/.cache/synthtool/java-iam/synth.py.
On branch autosynth-153
nothing to commit, working tree clean
2020-08-24 16:01:18,960 synthtool [DEBUG] > Ensuring dependencies.
2020-08-24 16:01:18,974 synthtool [DEBUG] > Cloning googleapis.
2020-08-24 16:01:19,654 synthtool [DEBUG] > Generating code for: //google/iam/v1:google-iam-v1-java.
2020-08-24 16:01:19,790 synthtool [ERROR] > Failed executing bazel --max_idle_secs=240 build //google/iam/v1:google-iam-v1-java:

Loading:
Loading: 0 packages loaded
DEBUG: Rule 'com_github_grpc_grpc' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "6a327f757b86469336169580199274ea37fe759489406c4da5d389bee637065d"
DEBUG: Call stack for the definition of repository 'com_github_grpc_grpc' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:113:1
DEBUG: Rule 'com_google_api_gax_java' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "861226f761ca8e9a69eeb5f8be72abfd21d466ef13fdbe73417420878336c63c"
DEBUG: Call stack for the definition of repository 'com_google_api_gax_java' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:145:1
DEBUG: Rule 'io_grpc_grpc_java' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "aff70994303c0055697a8ab00d8b30737d055b1ff42006278a5bda075a1dad4b"
DEBUG: Call stack for the definition of repository 'io_grpc_grpc_java' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/com_google_api_gax_java/repositories.bzl:122:5
 - /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/com_google_api_gax_java/repositories.bzl:60:5
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:160:1
DEBUG: Rule 'com_google_api_codegen' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "73f407fe381ab1ad3192176f2fbc0820d3c4aa62fcafe536685803e6853662a6"
DEBUG: Call stack for the definition of repository 'com_google_api_codegen' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:77:1
DEBUG: Rule 'com_google_protoc_java_resource_names_plugin' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "4b714b35ee04ba90f560ee60e64c7357428efcb6b0f3a298f343f8ec2c6d4a5d"
DEBUG: Call stack for the definition of repository 'com_google_protoc_java_resource_names_plugin' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:177:1
DEBUG: Rule 'gapic_generator_python' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "5f7c9e6d005efea4f4433020cd11a2b500f92357e1f3285e89ec1aa4bde0a068"
DEBUG: Call stack for the definition of repository 'gapic_generator_python' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:224:1
DEBUG: Rule 'gapic_generator_typescript' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "a7114028de1eb5437d1d5bc1465070341cea4c4394a0bf713b429e8e396dab15"
DEBUG: Call stack for the definition of repository 'gapic_generator_typescript' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:280:1
ERROR: Skipping '//google/iam/v1:google-iam-v1-java': no such target '//google/iam/v1:google-iam-v1-java': target 'google-iam-v1-java' not declared in package 'google/iam/v1' defined by /home/kbuilder/.cache/synthtool/googleapis/google/iam/v1/BUILD.bazel
WARNING: Target pattern parsing failed.
ERROR: no such target '//google/iam/v1:google-iam-v1-java': target 'google-iam-v1-java' not declared in package 'google/iam/v1' defined by /home/kbuilder/.cache/synthtool/googleapis/google/iam/v1/BUILD.bazel
INFO: Elapsed time: 0.127s
INFO: 0 processes.
FAILED: Build did NOT complete successfully (1 packages loaded)
FAILED: Build did NOT complete successfully (1 packages loaded)

Traceback (most recent call last):
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/tmpfs/src/github/synthtool/synthtool/__main__.py", line 102, in <module>
    main()
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 782, in main
    rv = self.invoke(ctx)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/tmpfs/src/github/synthtool/synthtool/__main__.py", line 94, in main
    spec.loader.exec_module(synth_module)  # type: ignore
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/kbuilder/.cache/synthtool/java-iam/synth.py", line 31, in <module>
    bazel_target=f'//google/iam/{version}:google-iam-{version}-java',
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 62, in java_library
    service, version, "java", tar_strip_components=0, **kwargs
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 183, in _generate_code
    shell.run(bazel_run_args)
  File "/tmpfs/src/github/synthtool/synthtool/shell.py", line 39, in run
    raise exc
  File "/tmpfs/src/github/synthtool/synthtool/shell.py", line 33, in run
    encoding="utf-8",
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/subprocess.py", line 438, in run
    output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command '['bazel', '--max_idle_secs=240', 'build', '//google/iam/v1:google-iam-v1-java']' returned non-zero exit status 1.
2020-08-24 16:01:19,841 autosynth [ERROR] > Synthesis failed
2020-08-24 16:01:19,841 autosynth [DEBUG] > Running: git reset --hard HEAD
HEAD is now at 170f36e chore: fix 1.0.0 release versions (#27)
2020-08-24 16:01:19,847 autosynth [DEBUG] > Running: git checkout autosynth
Switched to branch 'autosynth'
2020-08-24 16:01:19,852 autosynth [DEBUG] > Running: git clean -fdx
Removing __pycache__/
Traceback (most recent call last):
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 690, in <module>
    main()
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 539, in main
    return _inner_main(temp_dir)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 670, in _inner_main
    commit_count = synthesize_loop(x, multiple_prs, change_pusher, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 375, in synthesize_loop
    has_changes = toolbox.synthesize_version_in_new_branch(synthesizer, youngest)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 273, in synthesize_version_in_new_branch
    synthesizer.synthesize(synth_log_path, self.environ)
  File "/tmpfs/src/github/synthtool/autosynth/synthesizer.py", line 120, in synthesize
    synth_proc.check_returncode()  # Raise an exception.
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/subprocess.py", line 389, in check_returncode
    self.stderr)
subprocess.CalledProcessError: Command '['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']' returned non-zero exit status 1.

Google internal developers can see the full log here.

Autosynth is still having trouble generating java-iam. :sob:
Here's the output from running synth.py:
ckout -b <new-branch-name>

HEAD is now at 05de3e1 fix: move system and samples test from Node 10 to Node 12 (#725)
2020-08-25 02:44:13,335 autosynth [DEBUG] > Running: git branch -f autosynth-153
2020-08-25 02:44:13,340 autosynth [DEBUG] > Running: git checkout autosynth-153
Switched to branch 'autosynth-153'
2020-08-25 02:44:13,347 autosynth [INFO] > Running synthtool
2020-08-25 02:44:13,347 autosynth [INFO] > ['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']
2020-08-25 02:44:13,348 autosynth [DEBUG] > log_file_path: /tmpfs/src/logs/java-iam/153/sponge_log.log
2020-08-25 02:44:13,351 autosynth [DEBUG] > Running: /tmpfs/src/github/synthtool/env/bin/python3 -m synthtool --metadata synth.metadata synth.py --
2020-08-25 02:44:13,617 synthtool [DEBUG] > Executing /home/kbuilder/.cache/synthtool/java-iam/synth.py.
On branch autosynth-153
nothing to commit, working tree clean
2020-08-25 02:44:13,780 synthtool [DEBUG] > Ensuring dependencies.
2020-08-25 02:44:13,797 synthtool [DEBUG] > Cloning googleapis.
2020-08-25 02:44:14,490 synthtool [DEBUG] > Generating code for: //google/iam/v1:google-iam-v1-java.
2020-08-25 02:44:14,676 synthtool [ERROR] > Failed executing bazel --max_idle_secs=240 build //google/iam/v1:google-iam-v1-java:

Loading:
Loading: 0 packages loaded
DEBUG: Rule 'com_github_grpc_grpc' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "6a327f757b86469336169580199274ea37fe759489406c4da5d389bee637065d"
DEBUG: Call stack for the definition of repository 'com_github_grpc_grpc' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:113:1
DEBUG: Rule 'com_google_api_gax_java' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "861226f761ca8e9a69eeb5f8be72abfd21d466ef13fdbe73417420878336c63c"
DEBUG: Call stack for the definition of repository 'com_google_api_gax_java' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:145:1
DEBUG: Rule 'io_grpc_grpc_java' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "aff70994303c0055697a8ab00d8b30737d055b1ff42006278a5bda075a1dad4b"
DEBUG: Call stack for the definition of repository 'io_grpc_grpc_java' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/com_google_api_gax_java/repositories.bzl:122:5
 - /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/com_google_api_gax_java/repositories.bzl:60:5
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:160:1
DEBUG: Rule 'com_google_api_codegen' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "73f407fe381ab1ad3192176f2fbc0820d3c4aa62fcafe536685803e6853662a6"
DEBUG: Call stack for the definition of repository 'com_google_api_codegen' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:77:1
DEBUG: Rule 'com_google_protoc_java_resource_names_plugin' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "4b714b35ee04ba90f560ee60e64c7357428efcb6b0f3a298f343f8ec2c6d4a5d"
DEBUG: Call stack for the definition of repository 'com_google_protoc_java_resource_names_plugin' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:177:1
DEBUG: Rule 'gapic_generator_python' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "5f7c9e6d005efea4f4433020cd11a2b500f92357e1f3285e89ec1aa4bde0a068"
DEBUG: Call stack for the definition of repository 'gapic_generator_python' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:224:1
DEBUG: Rule 'gapic_generator_typescript' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "a7114028de1eb5437d1d5bc1465070341cea4c4394a0bf713b429e8e396dab15"
DEBUG: Call stack for the definition of repository 'gapic_generator_typescript' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:280:1
ERROR: Skipping '//google/iam/v1:google-iam-v1-java': no such target '//google/iam/v1:google-iam-v1-java': target 'google-iam-v1-java' not declared in package 'google/iam/v1' defined by /home/kbuilder/.cache/synthtool/googleapis/google/iam/v1/BUILD.bazel
WARNING: Target pattern parsing failed.
ERROR: no such target '//google/iam/v1:google-iam-v1-java': target 'google-iam-v1-java' not declared in package 'google/iam/v1' defined by /home/kbuilder/.cache/synthtool/googleapis/google/iam/v1/BUILD.bazel
INFO: Elapsed time: 0.174s
INFO: 0 processes.
FAILED: Build did NOT complete successfully (1 packages loaded)
FAILED: Build did NOT complete successfully (1 packages loaded)

Traceback (most recent call last):
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/tmpfs/src/github/synthtool/synthtool/__main__.py", line 102, in <module>
    main()
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 782, in main
    rv = self.invoke(ctx)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/tmpfs/src/github/synthtool/synthtool/__main__.py", line 94, in main
    spec.loader.exec_module(synth_module)  # type: ignore
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/kbuilder/.cache/synthtool/java-iam/synth.py", line 31, in <module>
    bazel_target=f'//google/iam/{version}:google-iam-{version}-java',
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 62, in java_library
    service, version, "java", tar_strip_components=0, **kwargs
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 183, in _generate_code
    shell.run(bazel_run_args)
  File "/tmpfs/src/github/synthtool/synthtool/shell.py", line 39, in run
    raise exc
  File "/tmpfs/src/github/synthtool/synthtool/shell.py", line 33, in run
    encoding="utf-8",
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/subprocess.py", line 438, in run
    output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command '['bazel', '--max_idle_secs=240', 'build', '//google/iam/v1:google-iam-v1-java']' returned non-zero exit status 1.
2020-08-25 02:44:14,749 autosynth [ERROR] > Synthesis failed
2020-08-25 02:44:14,749 autosynth [DEBUG] > Running: git reset --hard HEAD
HEAD is now at 170f36e chore: fix 1.0.0 release versions (#27)
2020-08-25 02:44:14,755 autosynth [DEBUG] > Running: git checkout autosynth
Switched to branch 'autosynth'
2020-08-25 02:44:14,762 autosynth [DEBUG] > Running: git clean -fdx
Removing __pycache__/
Traceback (most recent call last):
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 690, in <module>
    main()
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 539, in main
    return _inner_main(temp_dir)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 670, in _inner_main
    commit_count = synthesize_loop(x, multiple_prs, change_pusher, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 375, in synthesize_loop
    has_changes = toolbox.synthesize_version_in_new_branch(synthesizer, youngest)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 273, in synthesize_version_in_new_branch
    synthesizer.synthesize(synth_log_path, self.environ)
  File "/tmpfs/src/github/synthtool/autosynth/synthesizer.py", line 120, in synthesize
    synth_proc.check_returncode()  # Raise an exception.
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/subprocess.py", line 389, in check_returncode
    self.stderr)
subprocess.CalledProcessError: Command '['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']' returned non-zero exit status 1.

Google internal developers can see the full log here.

Autosynth is still having trouble generating java-iam. :sob:
Here's the output from running synth.py:
checkout -b <new-branch-name>

HEAD is now at 968465a fix: temporarily disable reporting to unblock releases (#733)
2020-08-25 16:37:23,529 autosynth [DEBUG] > Running: git branch -f autosynth-154
2020-08-25 16:37:23,533 autosynth [DEBUG] > Running: git checkout autosynth-154
Switched to branch 'autosynth-154'
2020-08-25 16:37:23,538 autosynth [INFO] > Running synthtool
2020-08-25 16:37:23,538 autosynth [INFO] > ['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']
2020-08-25 16:37:23,538 autosynth [DEBUG] > log_file_path: /tmpfs/src/logs/java-iam/154/sponge_log.log
2020-08-25 16:37:23,540 autosynth [DEBUG] > Running: /tmpfs/src/github/synthtool/env/bin/python3 -m synthtool --metadata synth.metadata synth.py --
2020-08-25 16:37:23,769 synthtool [DEBUG] > Executing /home/kbuilder/.cache/synthtool/java-iam/synth.py.
On branch autosynth-154
nothing to commit, working tree clean
2020-08-25 16:37:23,907 synthtool [DEBUG] > Ensuring dependencies.
2020-08-25 16:37:23,919 synthtool [DEBUG] > Cloning googleapis.
2020-08-25 16:37:24,582 synthtool [DEBUG] > Generating code for: //google/iam/v1:google-iam-v1-java.
2020-08-25 16:37:24,715 synthtool [ERROR] > Failed executing bazel --max_idle_secs=240 build //google/iam/v1:google-iam-v1-java:

Loading:
Loading: 0 packages loaded
DEBUG: Rule 'com_github_grpc_grpc' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "6a327f757b86469336169580199274ea37fe759489406c4da5d389bee637065d"
DEBUG: Call stack for the definition of repository 'com_github_grpc_grpc' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:113:1
DEBUG: Rule 'com_google_api_gax_java' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "4638977c21dcb471914d051da5fcd767cc28f2b84086acffd61adddf60136161"
DEBUG: Call stack for the definition of repository 'com_google_api_gax_java' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:146:1
DEBUG: Rule 'io_grpc_grpc_java' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "aff70994303c0055697a8ab00d8b30737d055b1ff42006278a5bda075a1dad4b"
DEBUG: Call stack for the definition of repository 'io_grpc_grpc_java' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/com_google_api_gax_java/repositories.bzl:122:5
 - /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/com_google_api_gax_java/repositories.bzl:60:5
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:161:1
DEBUG: Rule 'com_google_api_codegen' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "73f407fe381ab1ad3192176f2fbc0820d3c4aa62fcafe536685803e6853662a6"
DEBUG: Call stack for the definition of repository 'com_google_api_codegen' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:77:1
DEBUG: Rule 'com_google_protoc_java_resource_names_plugin' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "4b714b35ee04ba90f560ee60e64c7357428efcb6b0f3a298f343f8ec2c6d4a5d"
DEBUG: Call stack for the definition of repository 'com_google_protoc_java_resource_names_plugin' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:178:1
DEBUG: Rule 'gapic_generator_python' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "5f7c9e6d005efea4f4433020cd11a2b500f92357e1f3285e89ec1aa4bde0a068"
DEBUG: Call stack for the definition of repository 'gapic_generator_python' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:225:1
DEBUG: Rule 'gapic_generator_typescript' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "a7114028de1eb5437d1d5bc1465070341cea4c4394a0bf713b429e8e396dab15"
DEBUG: Call stack for the definition of repository 'gapic_generator_typescript' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:281:1
ERROR: Skipping '//google/iam/v1:google-iam-v1-java': no such target '//google/iam/v1:google-iam-v1-java': target 'google-iam-v1-java' not declared in package 'google/iam/v1' defined by /home/kbuilder/.cache/synthtool/googleapis/google/iam/v1/BUILD.bazel
WARNING: Target pattern parsing failed.
ERROR: no such target '//google/iam/v1:google-iam-v1-java': target 'google-iam-v1-java' not declared in package 'google/iam/v1' defined by /home/kbuilder/.cache/synthtool/googleapis/google/iam/v1/BUILD.bazel
INFO: Elapsed time: 0.125s
INFO: 0 processes.
FAILED: Build did NOT complete successfully (1 packages loaded)
FAILED: Build did NOT complete successfully (1 packages loaded)

Traceback (most recent call last):
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/tmpfs/src/github/synthtool/synthtool/__main__.py", line 102, in <module>
    main()
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 782, in main
    rv = self.invoke(ctx)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/tmpfs/src/github/synthtool/synthtool/__main__.py", line 94, in main
    spec.loader.exec_module(synth_module)  # type: ignore
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/kbuilder/.cache/synthtool/java-iam/synth.py", line 31, in <module>
    bazel_target=f'//google/iam/{version}:google-iam-{version}-java',
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 62, in java_library
    service, version, "java", tar_strip_components=0, **kwargs
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 183, in _generate_code
    shell.run(bazel_run_args)
  File "/tmpfs/src/github/synthtool/synthtool/shell.py", line 39, in run
    raise exc
  File "/tmpfs/src/github/synthtool/synthtool/shell.py", line 33, in run
    encoding="utf-8",
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/subprocess.py", line 438, in run
    output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command '['bazel', '--max_idle_secs=240', 'build', '//google/iam/v1:google-iam-v1-java']' returned non-zero exit status 1.
2020-08-25 16:37:24,773 autosynth [ERROR] > Synthesis failed
2020-08-25 16:37:24,773 autosynth [DEBUG] > Running: git reset --hard HEAD
HEAD is now at 170f36e chore: fix 1.0.0 release versions (#27)
2020-08-25 16:37:24,779 autosynth [DEBUG] > Running: git checkout autosynth
Switched to branch 'autosynth'
2020-08-25 16:37:24,784 autosynth [DEBUG] > Running: git clean -fdx
Removing __pycache__/
Traceback (most recent call last):
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 690, in <module>
    main()
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 539, in main
    return _inner_main(temp_dir)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 670, in _inner_main
    commit_count = synthesize_loop(x, multiple_prs, change_pusher, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 375, in synthesize_loop
    has_changes = toolbox.synthesize_version_in_new_branch(synthesizer, youngest)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 273, in synthesize_version_in_new_branch
    synthesizer.synthesize(synth_log_path, self.environ)
  File "/tmpfs/src/github/synthtool/autosynth/synthesizer.py", line 120, in synthesize
    synth_proc.check_returncode()  # Raise an exception.
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/subprocess.py", line 389, in check_returncode
    self.stderr)
subprocess.CalledProcessError: Command '['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']' returned non-zero exit status 1.

Google internal developers can see the full log here.

Autosynth is still having trouble generating java-iam. :sob:
Here's the output from running synth.py:
checkout -b <new-branch-name>

HEAD is now at 968465a fix: temporarily disable reporting to unblock releases (#733)
2020-08-25 17:48:34,763 autosynth [DEBUG] > Running: git branch -f autosynth-154
2020-08-25 17:48:34,768 autosynth [DEBUG] > Running: git checkout autosynth-154
Switched to branch 'autosynth-154'
2020-08-25 17:48:34,774 autosynth [INFO] > Running synthtool