- /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:76:1
DEBUG: Rule 'protoc_docs_plugin' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "33b387245455775e0de45869c7355cc5a9e98b396a6fc43b02812a63b75fee20"
DEBUG: Call stack for the definition of repository 'protoc_docs_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:196:1
DEBUG: Rule 'gapic_generator_python' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "0d98c514fbe86b463310bd284fab8793df25979aea66926ed943b6a6a1c3bb77"
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:219:1
DEBUG: Rule 'com_googleapis_gapic_generator_go' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "12bfed7873f085093cd60615bd113178ecf36396af0c2ca25e6cd4d4bebdd198"
DEBUG: Call stack for the definition of repository 'com_googleapis_gapic_generator_go' 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:256:1
DEBUG: Rule 'gapic_generator_typescript' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "161462fb86a7241006b60f6c4c816924ddcff08b8691f258f3804cfc6714dfde"
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:275:1
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: 1.639s
INFO: 0 processes.

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 61, in java_library
    return self._generate_code(service, version, "java", **kwargs)
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 180, 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=60', 'build', '//google/iam/v1:google-iam-v1-java']' returned non-zero exit status 1.
2020-06-20 15:22:21,364 autosynth [ERROR] > Synthesis failed
2020-06-20 15:22:21,364 autosynth [DEBUG] > Running: git reset --hard HEAD
HEAD is now at 82c4bf5 feat(deps): adopt flatten plugin and google-cloud-shared-dependencies (#14)
2020-06-20 15:22:21,370 autosynth [DEBUG] > Running: git checkout autosynth
Switched to branch 'autosynth'
2020-06-20 15:22:21,376 autosynth [DEBUG] > Running: git clean -fdx
Removing __pycache__/
Traceback (most recent call last):
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 367, in synthesize_loop
    synthesize_inner_loop(fork, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 411, in synthesize_inner_loop
    synthesizer, len(toolbox.versions) - 1
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 266, 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.

During handling of the above exception, another exception occurred:

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 649, in <module>
    main()
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 506, in main
    return _inner_main(temp_dir)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 629, 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
    synthesize_loop_single_pr(toolbox, change_pusher, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 401, in synthesize_loop_single_pr
    synthesize_inner_loop(toolbox, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 411, in synthesize_inner_loop
    synthesizer, len(toolbox.versions) - 1
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 266, 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:
): run dependency test on Java 8 and 11 (#639)
2020-06-21 02:22:29,170 autosynth [DEBUG] > Running: git branch -f autosynth-86
2020-06-21 02:22:29,175 autosynth [DEBUG] > Running: git checkout autosynth-86
Switched to branch 'autosynth-86'
2020-06-21 02:22:29,180 autosynth [INFO] > Running synthtool
2020-06-21 02:22:29,180 autosynth [INFO] > ['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']
2020-06-21 02:22:29,180 autosynth [DEBUG] > log_file_path: /tmpfs/src/github/synthtool/logs/googleapis/java-iam/86/sponge_log.log
2020-06-21 02:22:29,183 autosynth [DEBUG] > Running: /tmpfs/src/github/synthtool/env/bin/python3 -m synthtool --metadata synth.metadata synth.py --
2020-06-21 02:22:29,397 synthtool [DEBUG] > Executing /home/kbuilder/.cache/synthtool/java-iam/synth.py.
On branch autosynth-86
nothing to commit, working tree clean
2020-06-21 02:22:29,541 synthtool [DEBUG] > Ensuring dependencies.
2020-06-21 02:22:29,553 synthtool [DEBUG] > Cloning googleapis.
2020-06-21 02:22:30,199 synthtool [DEBUG] > Generating code for: //google/iam/v1:google-iam-v1-java.
2020-06-21 02:22:31,944 synthtool [ERROR] > Failed executing bazel --max_idle_secs=60 build //google/iam/v1:google-iam-v1-java:

Loading:
Loading: 0 packages loaded
Loading: 0 packages loaded
DEBUG: Rule 'com_google_api_codegen' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "0633651c7e7cdbea16231025de8a8e55773c224ad840507a8f3b38f96461ad30"
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:76:1
DEBUG: Rule 'protoc_docs_plugin' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "33b387245455775e0de45869c7355cc5a9e98b396a6fc43b02812a63b75fee20"
DEBUG: Call stack for the definition of repository 'protoc_docs_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:196:1
DEBUG: Rule 'gapic_generator_python' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "0d98c514fbe86b463310bd284fab8793df25979aea66926ed943b6a6a1c3bb77"
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:219:1
DEBUG: Rule 'com_googleapis_gapic_generator_go' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "12bfed7873f085093cd60615bd113178ecf36396af0c2ca25e6cd4d4bebdd198"
DEBUG: Call stack for the definition of repository 'com_googleapis_gapic_generator_go' 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:256:1
DEBUG: Rule 'gapic_generator_typescript' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "161462fb86a7241006b60f6c4c816924ddcff08b8691f258f3804cfc6714dfde"
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:275:1
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: 1.736s
INFO: 0 processes.

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 61, in java_library
    return self._generate_code(service, version, "java", **kwargs)
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 180, 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=60', 'build', '//google/iam/v1:google-iam-v1-java']' returned non-zero exit status 1.
2020-06-21 02:22:32,015 autosynth [ERROR] > Synthesis failed
2020-06-21 02:22:32,015 autosynth [DEBUG] > Running: git reset --hard HEAD
HEAD is now at 82c4bf5 feat(deps): adopt flatten plugin and google-cloud-shared-dependencies (#14)
2020-06-21 02:22:32,022 autosynth [DEBUG] > Running: git checkout autosynth
Switched to branch 'autosynth'
2020-06-21 02:22:32,027 autosynth [DEBUG] > Running: git clean -fdx
Removing __pycache__/
Traceback (most recent call last):
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 367, in synthesize_loop
    synthesize_inner_loop(fork, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 411, in synthesize_inner_loop
    synthesizer, len(toolbox.versions) - 1
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 266, 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.

During handling of the above exception, another exception occurred:

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 649, in <module>
    main()
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 506, in main
    return _inner_main(temp_dir)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 629, 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
    synthesize_loop_single_pr(toolbox, change_pusher, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 401, in synthesize_loop_single_pr
    synthesize_inner_loop(toolbox, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 411, in synthesize_inner_loop
    synthesizer, len(toolbox.versions) - 1
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 266, 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:
): run dependency test on Java 8 and 11 (#639)
2020-06-21 15:25:50,338 autosynth [DEBUG] > Running: git branch -f autosynth-86
2020-06-21 15:25:50,342 autosynth [DEBUG] > Running: git checkout autosynth-86
Switched to branch 'autosynth-86'
2020-06-21 15:25:50,346 autosynth [INFO] > Running synthtool
2020-06-21 15:25:50,347 autosynth [INFO] > ['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']
2020-06-21 15:25:50,347 autosynth [DEBUG] > log_file_path: /tmpfs/src/github/synthtool/logs/googleapis/java-iam/86/sponge_log.log
2020-06-21 15:25:50,349 autosynth [DEBUG] > Running: /tmpfs/src/github/synthtool/env/bin/python3 -m synthtool --metadata synth.metadata synth.py --
2020-06-21 15:25:50,567 synthtool [DEBUG] > Executing /home/kbuilder/.cache/synthtool/java-iam/synth.py.
On branch autosynth-86
nothing to commit, working tree clean
2020-06-21 15:25:50,704 synthtool [DEBUG] > Ensuring dependencies.
2020-06-21 15:25:50,715 synthtool [DEBUG] > Cloning googleapis.
2020-06-21 15:25:51,322 synthtool [DEBUG] > Generating code for: //google/iam/v1:google-iam-v1-java.
2020-06-21 15:25:53,165 synthtool [ERROR] > Failed executing bazel --max_idle_secs=60 build //google/iam/v1:google-iam-v1-java:

Loading:
Loading: 0 packages loaded
Loading: 0 packages loaded
DEBUG: Rule 'com_google_api_codegen' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "0633651c7e7cdbea16231025de8a8e55773c224ad840507a8f3b38f96461ad30"
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:76:1
DEBUG: Rule 'protoc_docs_plugin' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "33b387245455775e0de45869c7355cc5a9e98b396a6fc43b02812a63b75fee20"
DEBUG: Call stack for the definition of repository 'protoc_docs_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:196:1
DEBUG: Rule 'gapic_generator_python' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "0d98c514fbe86b463310bd284fab8793df25979aea66926ed943b6a6a1c3bb77"
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:219:1
DEBUG: Rule 'com_googleapis_gapic_generator_go' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "12bfed7873f085093cd60615bd113178ecf36396af0c2ca25e6cd4d4bebdd198"
DEBUG: Call stack for the definition of repository 'com_googleapis_gapic_generator_go' 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:256:1
DEBUG: Rule 'gapic_generator_typescript' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "161462fb86a7241006b60f6c4c816924ddcff08b8691f258f3804cfc6714dfde"
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:275:1
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: 1.834s
INFO: 0 processes.

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 61, in java_library
    return self._generate_code(service, version, "java", **kwargs)
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 180, 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=60', 'build', '//google/iam/v1:google-iam-v1-java']' returned non-zero exit status 1.
2020-06-21 15:25:53,216 autosynth [ERROR] > Synthesis failed
2020-06-21 15:25:53,217 autosynth [DEBUG] > Running: git reset --hard HEAD
HEAD is now at 82c4bf5 feat(deps): adopt flatten plugin and google-cloud-shared-dependencies (#14)
2020-06-21 15:25:53,222 autosynth [DEBUG] > Running: git checkout autosynth
Switched to branch 'autosynth'
2020-06-21 15:25:53,227 autosynth [DEBUG] > Running: git clean -fdx
Removing __pycache__/
Traceback (most recent call last):
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 367, in synthesize_loop
    synthesize_inner_loop(fork, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 411, in synthesize_inner_loop
    synthesizer, len(toolbox.versions) - 1
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 266, 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.

During handling of the above exception, another exception occurred:

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 649, in <module>
    main()
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 506, in main
    return _inner_main(temp_dir)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 629, 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
    synthesize_loop_single_pr(toolbox, change_pusher, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 401, in synthesize_loop_single_pr
    synthesize_inner_loop(toolbox, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 411, in synthesize_inner_loop
    synthesizer, len(toolbox.versions) - 1
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 266, 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:
): run dependency test on Java 8 and 11 (#639)
2020-06-22 02:20:15,589 autosynth [DEBUG] > Running: git branch -f autosynth-86
2020-06-22 02:20:15,593 autosynth [DEBUG] > Running: git checkout autosynth-86
Switched to branch 'autosynth-86'
2020-06-22 02:20:15,598 autosynth [INFO] > Running synthtool
2020-06-22 02:20:15,598 autosynth [INFO] > ['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']
2020-06-22 02:20:15,598 autosynth [DEBUG] > log_file_path: /tmpfs/src/github/synthtool/logs/googleapis/java-iam/86/sponge_log.log
2020-06-22 02:20:15,601 autosynth [DEBUG] > Running: /tmpfs/src/github/synthtool/env/bin/python3 -m synthtool --metadata synth.metadata synth.py --
2020-06-22 02:20:15,812 synthtool [DEBUG] > Executing /home/kbuilder/.cache/synthtool/java-iam/synth.py.
On branch autosynth-86
nothing to commit, working tree clean
2020-06-22 02:20:15,944 synthtool [DEBUG] > Ensuring dependencies.
2020-06-22 02:20:15,955 synthtool [DEBUG] > Cloning googleapis.
2020-06-22 02:20:16,320 synthtool [DEBUG] > Generating code for: //google/iam/v1:google-iam-v1-java.
2020-06-22 02:20:17,992 synthtool [ERROR] > Failed executing bazel --max_idle_secs=60 build //google/iam/v1:google-iam-v1-java:

Loading:
Loading: 0 packages loaded
Loading: 0 packages loaded
DEBUG: Rule 'com_google_api_codegen' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "0633651c7e7cdbea16231025de8a8e55773c224ad840507a8f3b38f96461ad30"
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:76:1
DEBUG: Rule 'protoc_docs_plugin' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "33b387245455775e0de45869c7355cc5a9e98b396a6fc43b02812a63b75fee20"
DEBUG: Call stack for the definition of repository 'protoc_docs_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:196:1
DEBUG: Rule 'gapic_generator_python' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "0d98c514fbe86b463310bd284fab8793df25979aea66926ed943b6a6a1c3bb77"
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:219:1
DEBUG: Rule 'com_googleapis_gapic_generator_go' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "12bfed7873f085093cd60615bd113178ecf36396af0c2ca25e6cd4d4bebdd198"
DEBUG: Call stack for the definition of repository 'com_googleapis_gapic_generator_go' 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:256:1
DEBUG: Rule 'gapic_generator_typescript' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "161462fb86a7241006b60f6c4c816924ddcff08b8691f258f3804cfc6714dfde"
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:275:1
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: 1.663s
INFO: 0 processes.

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 61, in java_library
    return self._generate_code(service, version, "java", **kwargs)
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 180, 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=60', 'build', '//google/iam/v1:google-iam-v1-java']' returned non-zero exit status 1.
2020-06-22 02:20:18,037 autosynth [ERROR] > Synthesis failed
2020-06-22 02:20:18,037 autosynth [DEBUG] > Running: git reset --hard HEAD
HEAD is now at 82c4bf5 feat(deps): adopt flatten plugin and google-cloud-shared-dependencies (#14)
2020-06-22 02:20:18,042 autosynth [DEBUG] > Running: git checkout autosynth
Switched to branch 'autosynth'
2020-06-22 02:20:18,047 autosynth [DEBUG] > Running: git clean -fdx
Removing __pycache__/
Traceback (most recent call last):
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 367, in synthesize_loop
    synthesize_inner_loop(fork, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 411, in synthesize_inner_loop
    synthesizer, len(toolbox.versions) - 1
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 266, 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.

During handling of the above exception, another exception occurred:

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 649, in <module>
    main()
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 506, in main
    return _inner_main(temp_dir)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 629, 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
    synthesize_loop_single_pr(toolbox, change_pusher, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 401, in synthesize_loop_single_pr
    synthesize_inner_loop(toolbox, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 411, in synthesize_inner_loop
    synthesizer, len(toolbox.versions) - 1
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 266, 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:
hecking out '82c4bf50f419b7f57f9a0d15a554b7e8509b99db'.

You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
state without impacting any branches by performing another checkout.

If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -b with the checkout command again. Example:

  git checkout -b <new-branch-name>

HEAD is now at 82c4bf5 feat(deps): adopt flatten plugin and google-cloud-shared-dependencies (#14)
2020-06-22 15:57:01,862 autosynth [DEBUG] > Running: git checkout 4f2c9f752a94042472fc03c5bd9e06e89817d2bd
Previous HEAD position was 04cb397 chore: add labels with context info (#518)
HEAD is now at 4f2c9f7 ci(java): run dependency test on Java 8 and 11 (#639)
2020-06-22 15:57:01,881 autosynth [DEBUG] > Running: git branch -f autosynth-86
2020-06-22 15:57:01,884 autosynth [DEBUG] > Running: git checkout autosynth-86
Switched to branch 'autosynth-86'
2020-06-22 15:57:01,889 autosynth [INFO] > Running synthtool
2020-06-22 15:57:01,889 autosynth [INFO] > ['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']
2020-06-22 15:57:01,889 autosynth [DEBUG] > log_file_path: /tmpfs/src/github/synthtool/logs/googleapis/java-iam/86/sponge_log.log
2020-06-22 15:57:01,891 autosynth [DEBUG] > Running: /tmpfs/src/github/synthtool/env/bin/python3 -m synthtool --metadata synth.metadata synth.py --
2020-06-22 15:57:02,106 synthtool [DEBUG] > Executing /home/kbuilder/.cache/synthtool/java-iam/synth.py.
On branch autosynth-86
nothing to commit, working tree clean
2020-06-22 15:57:02,247 synthtool [DEBUG] > Ensuring dependencies.
2020-06-22 15:57:02,259 synthtool [DEBUG] > Cloning googleapis.
2020-06-22 15:57:02,629 synthtool [DEBUG] > Generating code for: //google/iam/v1:google-iam-v1-java.
2020-06-22 15:57:04,337 synthtool [ERROR] > Failed executing bazel --max_idle_secs=60 build //google/iam/v1:google-iam-v1-java:

Loading:
Loading: 0 packages loaded
Loading: 0 packages loaded
DEBUG: Rule 'com_google_api_gax_java' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "ccd7b629d26cfa51a12dbcb061264e2418ee9c7a29a018123d603394d4914e5d"
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:140:1
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:155:1
DEBUG: Rule 'com_google_protoc_java_resource_names_plugin' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "f7460232b34618bbfdb3336f847de70b9b199d6a5e39cf0d58b9d461191c4908"
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:172:1
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: 1.688s
INFO: 0 processes.

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 61, in java_library
    return self._generate_code(service, version, "java", **kwargs)
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 180, 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=60', 'build', '//google/iam/v1:google-iam-v1-java']' returned non-zero exit status 1.
2020-06-22 15:57:04,386 autosynth [ERROR] > Synthesis failed
2020-06-22 15:57:04,386 autosynth [DEBUG] > Running: git reset --hard HEAD
HEAD is now at 82c4bf5 feat(deps): adopt flatten plugin and google-cloud-shared-dependencies (#14)
2020-06-22 15:57:04,392 autosynth [DEBUG] > Running: git checkout autosynth
Switched to branch 'autosynth'
2020-06-22 15:57:04,396 autosynth [DEBUG] > Running: git clean -fdx
Removing __pycache__/
Traceback (most recent call last):
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 367, in synthesize_loop
    synthesize_inner_loop(fork, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 411, in synthesize_inner_loop
    synthesizer, len(toolbox.versions) - 1
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 266, 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.

During handling of the above exception, another exception occurred:

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 649, in <module>
    main()
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 506, in main
    return _inner_main(temp_dir)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 629, 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
    synthesize_loop_single_pr(toolbox, change_pusher, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 401, in synthesize_loop_single_pr
    synthesize_inner_loop(toolbox, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 411, in synthesize_inner_loop
    synthesizer, len(toolbox.versions) - 1
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 266, 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:
9b7f57f9a0d15a554b7e8509b99db'.

You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
state without impacting any branches by performing another checkout.

If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -b with the checkout command again. Example:

  git checkout -b <new-branch-name>

HEAD is now at 82c4bf5 feat(deps): adopt flatten plugin and google-cloud-shared-dependencies (#14)
2020-06-23 02:46:24,171 autosynth [DEBUG] > Running: git checkout cf2eff09d0f5319a4dc5cdce2b6356d85af4a798
Previous HEAD position was 04cb397 chore: add labels with context info (#518)
HEAD is now at cf2eff0 chore(python): fix line breaks in template and use newer black version (#643)
2020-06-23 02:46:24,191 autosynth [DEBUG] > Running: git branch -f autosynth-88
2020-06-23 02:46:24,195 autosynth [DEBUG] > Running: git checkout autosynth-88
Switched to branch 'autosynth-88'
2020-06-23 02:46:24,200 autosynth [INFO] > Running synthtool
2020-06-23 02:46:24,200 autosynth [INFO] > ['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']
2020-06-23 02:46:24,200 autosynth [DEBUG] > log_file_path: /tmpfs/src/github/synthtool/logs/googleapis/java-iam/88/sponge_log.log
2020-06-23 02:46:24,203 autosynth [DEBUG] > Running: /tmpfs/src/github/synthtool/env/bin/python3 -m synthtool --metadata synth.metadata synth.py --
2020-06-23 02:46:24,435 synthtool [DEBUG] > Executing /home/kbuilder/.cache/synthtool/java-iam/synth.py.
On branch autosynth-88
nothing to commit, working tree clean
2020-06-23 02:46:24,579 synthtool [DEBUG] > Ensuring dependencies.
2020-06-23 02:46:24,590 synthtool [DEBUG] > Cloning googleapis.
2020-06-23 02:46:25,294 synthtool [DEBUG] > Generating code for: //google/iam/v1:google-iam-v1-java.
2020-06-23 02:46:26,987 synthtool [ERROR] > Failed executing bazel --max_idle_secs=60 build //google/iam/v1:google-iam-v1-java:

Loading:
Loading: 0 packages loaded
Loading: 0 packages loaded
DEBUG: Rule 'com_google_api_gax_java' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "ccd7b629d26cfa51a12dbcb061264e2418ee9c7a29a018123d603394d4914e5d"
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:140:1
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:155:1
DEBUG: Rule 'com_google_protoc_java_resource_names_plugin' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "f7460232b34618bbfdb3336f847de70b9b199d6a5e39cf0d58b9d461191c4908"
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:172:1
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: 1.684s
INFO: 0 processes.

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 61, in java_library
    return self._generate_code(service, version, "java", **kwargs)
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 180, 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=60', 'build', '//google/iam/v1:google-iam-v1-java']' returned non-zero exit status 1.
2020-06-23 02:46:27,043 autosynth [ERROR] > Synthesis failed
2020-06-23 02:46:27,043 autosynth [DEBUG] > Running: git reset --hard HEAD
HEAD is now at 82c4bf5 feat(deps): adopt flatten plugin and google-cloud-shared-dependencies (#14)
2020-06-23 02:46:27,050 autosynth [DEBUG] > Running: git checkout autosynth
Switched to branch 'autosynth'
2020-06-23 02:46:27,056 autosynth [DEBUG] > Running: git clean -fdx
Removing __pycache__/
Traceback (most recent call last):
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 367, in synthesize_loop
    synthesize_inner_loop(fork, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 411, in synthesize_inner_loop
    synthesizer, len(toolbox.versions) - 1
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 266, 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.

During handling of the above exception, another exception occurred:

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 649, in <module>
    main()
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 506, in main
    return _inner_main(temp_dir)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 629, 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
    synthesize_loop_single_pr(toolbox, change_pusher, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 401, in synthesize_loop_single_pr
    synthesize_inner_loop(toolbox, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 411, in synthesize_inner_loop
    synthesizer, len(toolbox.versions) - 1
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 266, 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:
25:52,286 autosynth [INFO] > Running synthtool
2020-06-23 16:25:52,287 autosynth [INFO] > ['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']
2020-06-23 16:25:52,287 autosynth [DEBUG] > log_file_path: /tmpfs/src/logs/java-iam/90/sponge_log.log
2020-06-23 16:25:52,289 autosynth [DEBUG] > Running: /tmpfs/src/github/synthtool/env/bin/python3 -m synthtool --metadata synth.metadata synth.py --
2020-06-23 16:25:52,508 synthtool [DEBUG] > Executing /home/kbuilder/.cache/synthtool/java-iam/synth.py.
On branch autosynth-90
nothing to commit, working tree clean
2020-06-23 16:25:52,650 synthtool [DEBUG] > Ensuring dependencies.
2020-06-23 16:25:52,661 synthtool [DEBUG] > Cloning googleapis.
2020-06-23 16:25:53,008 synthtool [DEBUG] > Generating code for: //google/iam/v1:google-iam-v1-java.
2020-06-23 16:25:54,706 synthtool [ERROR] > Failed executing bazel --max_idle_secs=60 build //google/iam/v1:google-iam-v1-java:

Loading:
Loading: 0 packages loaded
Loading: 0 packages loaded
DEBUG: Rule 'com_github_grpc_grpc' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "4f0ad3557539a3d6edfad1693a92bd21acd3a6c3d610faa4714d64ad1d0a8072"
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:112:1
DEBUG: Rule 'com_google_api_gax_java' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "ccd7b629d26cfa51a12dbcb061264e2418ee9c7a29a018123d603394d4914e5d"
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:144:1
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:159:1
DEBUG: Rule 'com_google_protoc_java_resource_names_plugin' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "f7460232b34618bbfdb3336f847de70b9b199d6a5e39cf0d58b9d461191c4908"
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:176:1
DEBUG: Rule 'gapic_generator_python' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "dbc740e8d8d18ddd20fd8fdfbcee120b446ef0e92c8b7d84053a65fd8c0154a1"
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:223:1
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: 1.686s
INFO: 0 processes.

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 61, in java_library
    return self._generate_code(service, version, "java", **kwargs)
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 180, 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=60', 'build', '//google/iam/v1:google-iam-v1-java']' returned non-zero exit status 1.
2020-06-23 16:25:54,780 autosynth [ERROR] > Synthesis failed
2020-06-23 16:25:54,781 autosynth [DEBUG] > Running: git reset --hard HEAD
HEAD is now at 82c4bf5 feat(deps): adopt flatten plugin and google-cloud-shared-dependencies (#14)
2020-06-23 16:25:54,787 autosynth [DEBUG] > Running: git checkout autosynth
Switched to branch 'autosynth'
2020-06-23 16:25:54,794 autosynth [DEBUG] > Running: git clean -fdx
Removing __pycache__/
Traceback (most recent call last):
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 367, in synthesize_loop
    synthesize_inner_loop(fork, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 411, in synthesize_inner_loop
    synthesizer, len(toolbox.versions) - 1
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 266, 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.

During handling of the above exception, another exception occurred:

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 657, in <module>
    main()
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 506, in main
    return _inner_main(temp_dir)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 637, 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
    synthesize_loop_single_pr(toolbox, change_pusher, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 401, in synthesize_loop_single_pr
    synthesize_inner_loop(toolbox, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 411, in synthesize_inner_loop
    synthesizer, len(toolbox.versions) - 1
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 266, 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:
che/synthtool/java-iam/synth.py.
On branch autosynth-90
nothing to commit, working tree clean
2020-06-24 02:44:17,126 synthtool [DEBUG] > Ensuring dependencies.
2020-06-24 02:44:17,138 synthtool [DEBUG] > Cloning googleapis.
2020-06-24 02:44:17,474 synthtool [DEBUG] > Generating code for: //google/iam/v1:google-iam-v1-java.
2020-06-24 02:44:19,356 synthtool [ERROR] > Failed executing bazel --max_idle_secs=60 build //google/iam/v1:google-iam-v1-java:

Loading:
Loading: 0 packages loaded
Loading: 0 packages loaded
DEBUG: Rule 'com_github_grpc_grpc' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "4f0ad3557539a3d6edfad1693a92bd21acd3a6c3d610faa4714d64ad1d0a8072"
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 = "ccd7b629d26cfa51a12dbcb061264e2418ee9c7a29a018123d603394d4914e5d"
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 = "7f54b63c893346cdb8398005a88ed5a169dedb1c3264cd47827255c52f6638af"
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 = "f7460232b34618bbfdb3336f847de70b9b199d6a5e39cf0d58b9d461191c4908"
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 = "dbc740e8d8d18ddd20fd8fdfbcee120b446ef0e92c8b7d84053a65fd8c0154a1"
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
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: 1.870s
INFO: 0 processes.

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 61, in java_library
    return self._generate_code(service, version, "java", **kwargs)
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 180, 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=60', 'build', '//google/iam/v1:google-iam-v1-java']' returned non-zero exit status 1.
2020-06-24 02:44:19,426 autosynth [ERROR] > Synthesis failed
2020-06-24 02:44:19,426 autosynth [DEBUG] > Running: git reset --hard HEAD
HEAD is now at 82c4bf5 feat(deps): adopt flatten plugin and google-cloud-shared-dependencies (#14)
2020-06-24 02:44:19,432 autosynth [DEBUG] > Running: git checkout autosynth
Switched to branch 'autosynth'
2020-06-24 02:44:19,438 autosynth [DEBUG] > Running: git clean -fdx
Removing __pycache__/
Traceback (most recent call last):
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 367, in synthesize_loop
    synthesize_inner_loop(fork, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 411, in synthesize_inner_loop
    synthesizer, len(toolbox.versions) - 1
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 266, 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.

During handling of the above exception, another exception occurred:

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 657, in <module>
    main()
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 506, in main
    return _inner_main(temp_dir)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 637, 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
    synthesize_loop_single_pr(toolbox, change_pusher, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 401, in synthesize_loop_single_pr
    synthesize_inner_loop(toolbox, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 411, in synthesize_inner_loop
    synthesizer, len(toolbox.versions) - 1
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 266, 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:
thub_grpc_grpc' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "4f0ad3557539a3d6edfad1693a92bd21acd3a6c3d610faa4714d64ad1d0a8072"
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 = "ccd7b629d26cfa51a12dbcb061264e2418ee9c7a29a018123d603394d4914e5d"
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 = "7f54b63c893346cdb8398005a88ed5a169dedb1c3264cd47827255c52f6638af"
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 = "f7460232b34618bbfdb3336f847de70b9b199d6a5e39cf0d58b9d461191c4908"
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 = "dbc740e8d8d18ddd20fd8fdfbcee120b446ef0e92c8b7d84053a65fd8c0154a1"
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 = "67e6e8323386c68a6d26a665394b85cf420d519941bcd12844316a69b229d11a"
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: 1.847s
INFO: 0 processes.

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 61, in java_library
    return self._generate_code(service, version, "java", **kwargs)
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 180, 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=60', 'build', '//google/iam/v1:google-iam-v1-java']' returned non-zero exit status 1.
2020-06-24 16:27:04,193 autosynth [ERROR] > Synthesis failed
2020-06-24 16:27:04,193 autosynth [DEBUG] > Running: git reset --hard HEAD
HEAD is now at 82c4bf5 feat(deps): adopt flatten plugin and google-cloud-shared-dependencies (#14)
2020-06-24 16:27:04,198 autosynth [DEBUG] > Running: git checkout autosynth
Switched to branch 'autosynth'
2020-06-24 16:27:04,202 autosynth [DEBUG] > Running: git clean -fdx
Removing __pycache__/
Traceback (most recent call last):
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 367, in synthesize_loop
    synthesize_inner_loop(fork, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 411, in synthesize_inner_loop
    synthesizer, len(toolbox.versions) - 1
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 266, 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.

During handling of the above exception, another exception occurred:

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 657, in <module>
    main()
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 506, in main
    return _inner_main(temp_dir)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 637, 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
    synthesize_loop_single_pr(toolbox, change_pusher, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 401, in synthesize_loop_single_pr
    synthesize_inner_loop(toolbox, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 411, in synthesize_inner_loop
    synthesizer, len(toolbox.versions) - 1
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 266, 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:
thub_grpc_grpc' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "4f0ad3557539a3d6edfad1693a92bd21acd3a6c3d610faa4714d64ad1d0a8072"
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 = "ccd7b629d26cfa51a12dbcb061264e2418ee9c7a29a018123d603394d4914e5d"
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 = "7f54b63c893346cdb8398005a88ed5a169dedb1c3264cd47827255c52f6638af"
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 = "f7460232b34618bbfdb3336f847de70b9b199d6a5e39cf0d58b9d461191c4908"
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 = "dbc740e8d8d18ddd20fd8fdfbcee120b446ef0e92c8b7d84053a65fd8c0154a1"
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 = "67e6e8323386c68a6d26a665394b85cf420d519941bcd12844316a69b229d11a"
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: 1.933s
INFO: 0 processes.

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 61, in java_library
    return self._generate_code(service, version, "java", **kwargs)
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 180, 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=60', 'build', '//google/iam/v1:google-iam-v1-java']' returned non-zero exit status 1.
2020-06-25 03:31:23,431 autosynth [ERROR] > Synthesis failed
2020-06-25 03:31:23,431 autosynth [DEBUG] > Running: git reset --hard HEAD
HEAD is now at 82c4bf5 feat(deps): adopt flatten plugin and google-cloud-shared-dependencies (#14)
2020-06-25 03:31:23,437 autosynth [DEBUG] > Running: git checkout autosynth
Switched to branch 'autosynth'
2020-06-25 03:31:23,441 autosynth [DEBUG] > Running: git clean -fdx
Removing __pycache__/
Traceback (most recent call last):
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 367, in synthesize_loop
    synthesize_inner_loop(fork, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 411, in synthesize_inner_loop
    synthesizer, len(toolbox.versions) - 1
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 266, 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.

During handling of the above exception, another exception occurred:

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 657, in <module>
    main()
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 506, in main
    return _inner_main(temp_dir)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 637, 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
    synthesize_loop_single_pr(toolbox, change_pusher, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 401, in synthesize_loop_single_pr
    synthesize_inner_loop(toolbox, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 411, in synthesize_inner_loop
    synthesizer, len(toolbox.versions) - 1
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 266, 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:
thub_grpc_grpc' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "4f0ad3557539a3d6edfad1693a92bd21acd3a6c3d610faa4714d64ad1d0a8072"
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 = "ccd7b629d26cfa51a12dbcb061264e2418ee9c7a29a018123d603394d4914e5d"
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 = "7f54b63c893346cdb8398005a88ed5a169dedb1c3264cd47827255c52f6638af"
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 = "f7460232b34618bbfdb3336f847de70b9b199d6a5e39cf0d58b9d461191c4908"
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 = "dbc740e8d8d18ddd20fd8fdfbcee120b446ef0e92c8b7d84053a65fd8c0154a1"
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 = "67e6e8323386c68a6d26a665394b85cf420d519941bcd12844316a69b229d11a"
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: 1.617s
INFO: 0 processes.

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 61, in java_library
    return self._generate_code(service, version, "java", **kwargs)
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 180, 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=60', 'build', '//google/iam/v1:google-iam-v1-java']' returned non-zero exit status 1.
2020-06-25 13:52:23,802 autosynth [ERROR] > Synthesis failed
2020-06-25 13:52:23,802 autosynth [DEBUG] > Running: git reset --hard HEAD
HEAD is now at 82c4bf5 feat(deps): adopt flatten plugin and google-cloud-shared-dependencies (#14)
2020-06-25 13:52:23,807 autosynth [DEBUG] > Running: git checkout autosynth
Switched to branch 'autosynth'
2020-06-25 13:52:23,812 autosynth [DEBUG] > Running: git clean -fdx
Removing __pycache__/
Traceback (most recent call last):
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 367, in synthesize_loop
    synthesize_inner_loop(fork, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 411, in synthesize_inner_loop
    synthesizer, len(toolbox.versions) - 1
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 266, 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.

During handling of the above exception, another exception occurred:

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 657, in <module>
    main()
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 506, in main
    return _inner_main(temp_dir)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 637, 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
    synthesize_loop_single_pr(toolbox, change_pusher, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 401, in synthesize_loop_single_pr
    synthesize_inner_loop(toolbox, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 411, in synthesize_inner_loop
    synthesizer, len(toolbox.versions) - 1
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 266, 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:
thub_grpc_grpc' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "4f0ad3557539a3d6edfad1693a92bd21acd3a6c3d610faa4714d64ad1d0a8072"
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 = "ccd7b629d26cfa51a12dbcb061264e2418ee9c7a29a018123d603394d4914e5d"
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 = "7f54b63c893346cdb8398005a88ed5a169dedb1c3264cd47827255c52f6638af"
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 = "f7460232b34618bbfdb3336f847de70b9b199d6a5e39cf0d58b9d461191c4908"
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 = "dbc740e8d8d18ddd20fd8fdfbcee120b446ef0e92c8b7d84053a65fd8c0154a1"
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 = "67e6e8323386c68a6d26a665394b85cf420d519941bcd12844316a69b229d11a"
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: 1.864s
INFO: 0 processes.

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 61, in java_library
    return self._generate_code(service, version, "java", **kwargs)
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 180, 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=60', 'build', '//google/iam/v1:google-iam-v1-java']' returned non-zero exit status 1.
2020-06-25 16:24:17,196 autosynth [ERROR] > Synthesis failed
2020-06-25 16:24:17,197 autosynth [DEBUG] > Running: git reset --hard HEAD
HEAD is now at 82c4bf5 feat(deps): adopt flatten plugin and google-cloud-shared-dependencies (#14)
2020-06-25 16:24:17,203 autosynth [DEBUG] > Running: git checkout autosynth
Switched to branch 'autosynth'
2020-06-25 16:24:17,210 autosynth [DEBUG] > Running: git clean -fdx
Removing __pycache__/
Traceback (most recent call last):
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 367, in synthesize_loop
    synthesize_inner_loop(fork, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 411, in synthesize_inner_loop
    synthesizer, len(toolbox.versions) - 1
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 266, 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.

During handling of the above exception, another exception occurred:

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 657, in <module>
    main()
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 506, in main
    return _inner_main(temp_dir)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 637, 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
    synthesize_loop_single_pr(toolbox, change_pusher, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 401, in synthesize_loop_single_pr
    synthesize_inner_loop(toolbox, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 411, in synthesize_inner_loop
    synthesizer, len(toolbox.versions) - 1
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 266, 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:
 indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "4f0ad3557539a3d6edfad1693a92bd21acd3a6c3d610faa4714d64ad1d0a8072"
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 = "ccd7b629d26cfa51a12dbcb061264e2418ee9c7a29a018123d603394d4914e5d"
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 = "7f54b63c893346cdb8398005a88ed5a169dedb1c3264cd47827255c52f6638af"
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 = "f7460232b34618bbfdb3336f847de70b9b199d6a5e39cf0d58b9d461191c4908"
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 = "dbc740e8d8d18ddd20fd8fdfbcee120b446ef0e92c8b7d84053a65fd8c0154a1"
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 = "67e6e8323386c68a6d26a665394b85cf420d519941bcd12844316a69b229d11a"
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: 1.811s
INFO: 0 processes.

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 61, in java_library
    return self._generate_code(service, version, "java", **kwargs)
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 180, 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=60', 'build', '//google/iam/v1:google-iam-v1-java']' returned non-zero exit status 1.
2020-06-26 04:24:05,458 autosynth [ERROR] > Synthesis failed
2020-06-26 04:24:05,459 autosynth [DEBUG] > Running: git reset --hard HEAD
HEAD is now at c54859b build(deps): update dependency com.google.cloud:google-cloud-shared-config to v0.9.0 (#17)
2020-06-26 04:24:05,466 autosynth [DEBUG] > Running: git checkout autosynth
Switched to branch 'autosynth'
2020-06-26 04:24:05,475 autosynth [DEBUG] > Running: git clean -fdx
Removing __pycache__/
Traceback (most recent call last):
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 367, in synthesize_loop
    synthesize_inner_loop(fork, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 411, in synthesize_inner_loop
    synthesizer, len(toolbox.versions) - 1
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 266, 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.

During handling of the above exception, another exception occurred:

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 657, in <module>
    main()
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 506, in main
    return _inner_main(temp_dir)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 637, 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
    synthesize_loop_single_pr(toolbox, change_pusher, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 401, in synthesize_loop_single_pr
    synthesize_inner_loop(toolbox, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 411, in synthesize_inner_loop
    synthesizer, len(toolbox.versions) - 1
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 266, 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:
 indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "4f0ad3557539a3d6edfad1693a92bd21acd3a6c3d610faa4714d64ad1d0a8072"