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Antoine Pitrou authored and GitHub committed 31d2afc28a2
GH-39126: [C++][CI] Fix Valgrind failures (#39127) ### Rationale for this change ### What changes are included in this PR? ### Are these changes tested? ### Are there any user-facing changes? * Closes: #39126 Lead-authored-by: Antoine Pitrou <pitrou@free.fr> Co-authored-by: Antoine Pitrou <antoine@python.org> Co-authored-by: Benjamin Kietzman <bengilgit@gmail.com> Signed-off-by: Antoine Pitrou <antoine@python.org>