Review request for GH-149008: py_compile CLI error missing newline

yuanx749 · June 14, 2026, 5:04pm

Hi, I’d like to ask if someone has time to review GH-149008:

It fixes gh-118158, where the py_compile CLI error output is missing a trailing newline. The PR is small, includes a test, and CI is passing.

I first pinged the issue and waited a week, but haven’t received a response:

github.com/python/cpython

py_compile CLI error message missing newline

opened 03:45PM - 22 Apr 24 UTC

bartlomiej-stefanski

type-bug stdlib

# Bug report ### Bug description: When attempting to run py_compile using its …CLI (`python3 -m py_compile test.py`) on file with erroneous indentation, ex: ```python # test.py print("hello world") # unexpected space characters before `print` ``` An error will be printed to `stderr`, but without a newline at the end. Although the py_compile documentation does not specify the error message format, the lack of newline is unconventional and can lead to unexpected behavior of scripts dependent on it. The same issue was already raised twice: - 2005 (2.7) https://github.com/python/cpython/issues/41763 - 2015 (3.4) https://github.com/python/cpython/issues/67999 in both instances the newline was added thus the lack of one now seems to be unintentional. --- If this is confirmed to be a bug I will attempt to write a fix for it. ### CPython versions tested on: 3.12 ### Operating systems tested on: Linux ### Linked PRs * gh-149008

Thanks.

yuanx749 · June 16, 2026, 7:45pm

Update: It has now been reviewed and merged. Thanks everyone.