gh-133998: Fix gzip file creation when time is out of range #134278
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huwcbjones
reviewed
May 20, 2025
huwcbjones
reviewed
May 21, 2025
| creation time. If *mtime* is omitted or ``None``, the current time is used; | ||
| however, if the current time is outside the range 00:00:00 UTC, January 1, | ||
| 1970 through 06:28:15 UTC, February 7, 2106, then the value ``0`` is used | ||
| instead. | ||
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The docs are slightly wrong now that GzipFile.__init__ will raise a ValueError if the specified value is out of range.
I know you've documented it in the docstring for __init__, but I think it's worth clarifying here since we're already in the area.
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| Set mtime to 0 to generate a compressed stream that does not depend on | ||
| creation time. If mtime is omitted or None, the current time is used; | ||
| however, if the current time is outside the range 00:00:00 UTC, January | ||
| 1, 1970 through 06:28:15 UTC, February 7, 2106, then the value 0 is used | ||
| instead. |
| @@ -0,0 +1 @@ | |||
| Fix ``struct.error`` exception when creating a file with ``gzip.GzipFile()`` if the system time is outside the range 00:00:00 UTC, January 1, 1970 through 06:28:15 UTC, February 7, 2106. | |||
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I think this should also be tweaked since the behaviour of providing an out-of-range mtime has changed
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If the system clock is set so that
time.time()falls outside of the range0through2**32-1, then creation of a GZIP-compressed file usinggzip.GzipFile()would fail with the exceptionstruct.error: 'L' format requires 0 <= number <= 4294967295. Fix this error.If the
mtimeargument togzip.GzipFile()is explicitly set to an out-of-range value, then the behavior is unchanged, and we continue raising the exception.2106-02-07T06:28:15#133998📚 Documentation preview 📚: https://cpython-previews--134278.org.readthedocs.build/