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[3.14] gh-160314: Raise for a damaged later stream in lzma and bz2 (GH-160315) - #161035
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…bz2 (pythonGH-160315) A damaged .xz or bzip2 stream that followed another stream was taken for trailing data and silently ignored. Leftover data that starts with the stream magic is now treated as a stream, as gzip does. ANT-2026-3TVAVL5A (cherry picked from commit a4f8047)
This was referenced Oct 31, 2026
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A damaged .xz or bzip2 stream that followed another stream was taken
for trailing data and silently ignored. Leftover data that starts with
the stream magic is now treated as a stream, as gzip does.
ANT-2026-3TVAVL5A
(cherry picked from commit a4f8047)
Manual backport notes (3.14): the automated backport conflicted only in
Doc/library/bz2.rst. A second commit drops theversionchangednotesthe original added to
Doc/library/bz2.rstandDoc/library/lzma.rst,as bugfix-level behavior changes are not recorded that way; they are
being removed on main as well. test_bz2, test_lzma and the other
compression-related tests pass on 3.14.
Issue: gh-160314