If I specify an invalid file in a

python_source

target, I get a rather misleading error 🤔

pants.engine.target.InvalidFieldException: The 'source' field in target src/to/target:the_target must have 1 file, but it had 0 files.

mm… rather than validating where it does,

SingleSourceField

should probably override

default_glob_match_error_behavior

to fail, which would cause it to fail before the validation with a better message

Oh hey check that out 😂 I was too dumb to look above the red error to see the yellow warn 😂

still! this should be fixed