Computing Select((<pants.engine.console.Console object at 0x1b921575f28>+OptionsBootstrapper(env_tuples<Exactly(tuple)>=(('PANTS_TEST_PYTEST_EXTRA_PYTHONPATH', '/Users/benjyw/Dropbox/pycharm-debug/pydevd-pycharm.egg'),), bootstrap_args<Exactly(tuple)>=(), args<Exactly(tuple)>=('./pants', '--v2', '--no-v1', 'buildgen2', '--buildgen2-source-roots=src/python/'), config<SubclassesOf(Config)>=_ChainedConfig(chained_configs=(<pants.option.config._SingleFileConfig object at 0x1b92137ac88>,)))), BuildGen)
  Computing Task(buildgen(), (<pants.engine.console.Console object at 0x1b921575f28>+OptionsBootstrapper(env_tuples<Exactly(tuple)>=(('PANTS_TEST_PYTEST_EXTRA_PYTHONPATH', '/Users/benjyw/Dropbox/pycharm-debug/pydevd-pycharm.egg'),), bootstrap_args<Exactly(tuple)>=(), args<Exactly(tuple)>=('./pants', '--v2', '--no-v1', 'buildgen2', '--buildgen2-source-roots=src/python/'), config<SubclassesOf(Config)>=_ChainedConfig(chained_configs=(<pants.option.config._SingleFileConfig object at 0x1b92137ac88>,)))), BuildGen, false)
    Computing Task(analyze_source_file(), SourceFileAndRoot(file_content<Exactly(FileContent)>=FileContent(path=src/python/toolchain/buildstats/jinja2/buildstats/base.html, content=(len:1103)), source_root<Exactly(str)>=src/python/), SourceFileAnalysis, true)
      Throw()
        Traceback (most recent call last):
          File "/Users/benjyw/.cache/pants/setup/bootstrap-Darwin-x86_64/1.20.0.dev1_py37/lib/python3.7/site-packages/pants/engine/native.py", line 440, in extern_generator_send
            res = c.from_value(func[0]).send(c.from_value(arg[0]))
        StopIteration