[3.12] gh-129726: Break gzip.GzipFile reference loop (GH-130055)
#130670
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A reference loop was resulting in the `fileobj` held by the `GzipFile` being closed before the `GzipFile`. The issue started with pythongh-89550 in 3.12, but was hidden in most cases until 3.13 when pythongh-62948 made it more visible. (cherry picked from commit 7f39137) Co-authored-by: Cody Maloney <cmaloney@users.noreply.github.com>
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A reference loop was resulting in the
fileobjheld by theGzipFilebeing closed before the
GzipFile.The issue started with gh-89550 in 3.12, but was hidden in most cases
until 3.13 when gh-62948 made it more visible.
(cherry picked from commit 7f39137)
Co-authored-by: Cody Maloney cmaloney@users.noreply.github.com