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David LiAntoine Pitrou
3de85aca65c
David Li authored and Antoine Pitrou committed 494b3323ff8
ARROW-11937: [C++] Fix GZip codec hanging if flushed twice

A mistaken check in GZipCompressor::Flush could lead CompressedOutputStream into an infinite flush->resize buffer retry loop if no data was written in between two flushes. Fix the check and add a regression test.

Closes #9680 from lidavidm/arrow-11937

Authored-by: David Li <li.davidm96@gmail.com>
Signed-off-by: Antoine Pitrou <antoine@python.org>