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gh-108111: Flush gzip write buffer before seeking, fixing bad writes (#108341)

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Co-authored-by: Łukasz Langa <lukasz@langa.pl>
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Chris Markiewicz 2023-08-24 04:23:01 -04:00 • committed by GitHub
parent aa9a359ca2
commit 2eb60c1934
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4 changed files with 18 additions and 0 deletions
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Lib/gzip.py
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@ -401,6 +401,9 @@ class GzipFile(_compression.BaseStream):
def seek(self, offset, whence=io.SEEK_SET):
if self.mode == WRITE:
self._check_not_closed()
# Flush buffer to ensure validity of self.offset
self._buffer.flush()
if whence != io.SEEK_SET:
if whence == io.SEEK_CUR:
offset = self.offset + offset