[3.10] bpo-41735: Fix thread lock in zlib.Decompress.flush() may go wrong (GH-29587) #29811
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Getting
.unconsumed_tail
before acquiring the thread lock may mix up decompress state.(cherry picked from commit 7edb627)
Co-authored-by: Ma Lin animalize@users.noreply.github.com
https://bugs.python.org/issue41735
Automerge-Triggered-By: GH:gpshead