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[3.14] gh-141930: Use the regular IO stack to write .pyc files for a better error message on failure (GH-141931) (#142021)

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Co-authored-by: Stefano Rivera <stefano@rivera.za.net>
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Miss Islington (bot) 2025-12-01 17:43:50 +01:00 • committed by GitHub
parent 521fb36561
commit afce34fbf0
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3 changed files with 59 additions and 22 deletions
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8
Lib/importlib/_bootstrap_external.py
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@ -208,12 +208,8 @@ def _write_atomic(path, data, mode=0o666):
try:
# We first write data to a temporary file, and then use os.replace() to
# perform an atomic rename.
with _io.FileIO(fd, 'wb') as file:
bytes_written = file.write(data)
if bytes_written != len(data):
# Raise an OSError so the 'except' below cleans up the partially
# written file.
raise OSError("os.write() didn't write the full pyc file")
with _io.open(fd, 'wb') as file:
file.write(data)
_os.replace(path_tmp, path)
except OSError:
try: