The validate goal behaves badly until configured.

[jsirois]

For example, over in the example-python repo, where validate is not configured, you get:

$ ./pants validate
09:34:36.43 [ERROR] Exception caught: (pants.engine.internals.scheduler.ExecutionError)
  File "/home/jsirois/.cache/pants/setup/bootstrap-Linux-x86_64/2.5.0_py39/lib/python3.9/site-packages/pants/bin/local_pants_runner.py", line 234, in _run_inner
    return self._perform_run(goals)
  File "/home/jsirois/.cache/pants/setup/bootstrap-Linux-x86_64/2.5.0_py39/lib/python3.9/site-packages/pants/bin/local_pants_runner.py", line 173, in _perform_run
    return self._perform_run_body(goals, poll=False)
  File "/home/jsirois/.cache/pants/setup/bootstrap-Linux-x86_64/2.5.0_py39/lib/python3.9/site-packages/pants/bin/local_pants_runner.py", line 190, in _perform_run_body
    return self.graph_session.run_goal_rules(
  File "/home/jsirois/.cache/pants/setup/bootstrap-Linux-x86_64/2.5.0_py39/lib/python3.9/site-packages/pants/init/engine_initializer.py", line 135, in run_goal_rules
    exit_code = self.scheduler_session.run_goal_rule(
  File "/home/jsirois/.cache/pants/setup/bootstrap-Linux-x86_64/2.5.0_py39/lib/python3.9/site-packages/pants/engine/internals/scheduler.py", line 530, in run_goal_rule
    self._raise_on_error([t for _, t in throws])
  File "/home/jsirois/.cache/pants/setup/bootstrap-Linux-x86_64/2.5.0_py39/lib/python3.9/site-packages/pants/engine/internals/scheduler.py", line 498, in _raise_on_error
    raise ExecutionError(

Exception message: 1 Exception encountered:

  KeyError: 'path_patterns'


(Use --print-stacktrace to see more error details.)