#20178 <unrecognized symbol> Error when using marco inside BUILD file Issue created by cedric-fauth Describe the bug I tried upgrading pants to 2.18.0. I have a macro file

build_file_prelude_globs = ["pants_plugins/macros.py"]

which worked in in pants 2.16.0 and 2.17.0. When running

pants

with version

2.18.0

I get:

Exception caught: (pants.engine.internals.scheduler.ExecutionError)
  File "/home/vscode/.cache/nce/3d6643e46b53e4cc0b2a0d5c768866226ddce3de1f57f80c4a02d8d39800fa8e/bindings/venvs/2.18.0/bin/pants", line 8, in <module>
    sys.exit(main())
  File "/home/vscode/.cache/nce/3d6643e46b53e4cc0b2a0d5c768866226ddce3de1f57f80c4a02d8d39800fa8e/bindings/venvs/2.18.0/lib/python3.9/site-packages/pants/bin/pants_loader.py", line 112, in main
    PantsLoader.main()
  File "/home/vscode/.cache/nce/3d6643e46b53e4cc0b2a0d5c768866226ddce3de1f57f80c4a02d8d39800fa8e/bindings/venvs/2.18.0/lib/python3.9/site-packages/pants/bin/pants_loader.py", line 108, in main
    cls.run_default_entrypoint()
  File "/home/vscode/.cache/nce/3d6643e46b53e4cc0b2a0d5c768866226ddce3de1f57f80c4a02d8d39800fa8e/bindings/venvs/2.18.0/lib/python3.9/site-packages/pants/bin/pants_loader.py", line 91, in run_default_entrypoint
    exit_code = runner.run(start_time)
  File "/home/vscode/.cache/nce/3d6643e46b53e4cc0b2a0d5c768866226ddce3de1f57f80c4a02d8d39800fa8e/bindings/venvs/2.18.0/lib/python3.9/site-packages/pants/bin/pants_runner.py", line 142, in run
    runner = LocalPantsRunner.create(
  File "/home/vscode/.cache/nce/3d6643e46b53e4cc0b2a0d5c768866226ddce3de1f57f80c4a02d8d39800fa8e/bindings/venvs/2.18.0/lib/python3.9/site-packages/pants/bin/local_pants_runner.py", line 93, in create
    build_config = options_initializer.build_config(options_bootstrapper, env)
  File "/home/vscode/.cache/nce/3d6643e46b53e4cc0b2a0d5c768866226ddce3de1f57f80c4a02d8d39800fa8e/bindings/venvs/2.18.0/lib/python3.9/site-packages/pants/init/options_initializer.py", line 153, in build_config
    return _initialize_build_configuration(self._plugin_resolver, options_bootstrapper, env)
  File "/home/vscode/.cache/nce/3d6643e46b53e4cc0b2a0d5c768866226ddce3de1f57f80c4a02d8d39800fa8e/bindings/venvs/2.18.0/lib/python3.9/site-packages/pants/init/options_initializer.py", line 52, in _initialize_build_configuration
    working_set = plugin_resolver.resolve(options_bootstrapper, env, backends_requirements)
  File "/home/vscode/.cache/nce/3d6643e46b53e4cc0b2a0d5c768866226ddce3de1f57f80c4a02d8d39800fa8e/bindings/venvs/2.18.0/lib/python3.9/site-packages/pants/init/plugin_resolver.py", line 141, in resolve
    for resolved_plugin_location in self._resolve_plugins(options_bootstrapper, env, request):
  File "/home/vscode/.cache/nce/3d6643e46b53e4cc0b2a0d5c768866226ddce3de1f57f80c4a02d8d39800fa8e/bindings/venvs/2.18.0/lib/python3.9/site-packages/pants/init/plugin_resolver.py", line 163, in _resolve_plugins
    params = Params(request, determine_bootstrap_environment(session))
  File "/home/vscode/.cache/nce/3d6643e46b53e4cc0b2a0d5c768866226ddce3de1f57f80c4a02d8d39800fa8e/bindings/venvs/2.18.0/lib/python3.9/site-packages/pants/core/util_rules/environments.py", line 448, in determine_bootstrap_environment
    session.product_request(ChosenLocalEnvironmentName, [Params()])[0],
  File "/home/vscode/.cache/nce/3d6643e46b53e4cc0b2a0d5c768866226ddce3de1f57f80c4a02d8d39800fa8e/bindings/venvs/2.18.0/lib/python3.9/site-packages/pants/engine/internals/scheduler.py", line 581, in product_request
    return self.execute(request)
  File "/home/vscode/.cache/nce/3d6643e46b53e4cc0b2a0d5c768866226ddce3de1f57f80c4a02d8d39800fa8e/bindings/venvs/2.18.0/lib/python3.9/site-packages/pants/engine/internals/scheduler.py", line 522, in execute
    self._raise_on_error([t for _, t in throws])
  File "/home/vscode/.cache/nce/3d6643e46b53e4cc0b2a0d5c768866226ddce3de1f57f80c4a02d8d39800fa8e/bindings/venvs/2.18.0/lib/python3.9/site-packages/pants/engine/internals/scheduler.py", line 506, in _raise_on_error
    raise ExecutionError(

Exception message: 1 Exception encountered:

InvalidTargetException: BUILD:25: The 'subprocess_environment_env_vars' field in target //:local-environment must be an iterable of strings (e.g. a list of strings), but was `env_vars_devcontainer()` with type `<unrecognized symbol>`.

NoneType: None

It's a really simple macro which just returns something like

["env1=val1", "...."]

Pants version 2.18.0 OS WSL devcontainer. Additional info Reminds me of #19156 pantsbuild/pants