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[3.15] gh-137571: Protect against possible UnboundLocalError in gzip._GzipReader.read() (GH-150222) #150229

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Merged
serhiy-storchaka merged 1 commit into from
May 22, 2026
+2 −2
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[3.15] gh-137571: Protect against possible UnboundLocalError in gzip._GzipReader.read() (GH-150222) #150229

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4 changes: 2 additions & 2 deletions Lib/gzip.py
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Original file line number Diff line number Diff line change
Expand Up @@ -610,10 +610,10 @@ def read(self, size=-1):
# Read a chunk of data from the file
if self._decompressor.needs_input:
buf = self._fp.read(READ_BUFFER_SIZE)
uncompress = self._decompressor.decompress(buf, size)
else:
uncompress = self._decompressor.decompress(b"", size)
buf = b""

uncompress = self._decompressor.decompress(buf, size)
if self._decompressor.unused_data != b"":
# Prepend the already read bytes to the fileobj so they can
# be seen by _read_eof() and _read_gzip_header()
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