Commits
Antoine Pitrou authored af4c8fc6657
ARROW-12140: [C++][CI] Fix Valgrind failures in Grouper tests Make sure no uninitialized bits remain in generated null bitmap. Closes #9839 from pitrou/ARROW-12140-valgrind-grouper Authored-by: Antoine Pitrou <antoine@python.org> Signed-off-by: Antoine Pitrou <antoine@python.org>