westonpace commented on a change in pull request #10955:
URL: https://github.com/apache/arrow/pull/10955#discussion_r718995474
##########
File path: cpp/src/arrow/testing/gtest_util.h
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@@ -94,7 +94,7 @@
#define ARROW_EXPECT_OK(expr) \
do { \
- auto _res = (expr); \
+ const auto& _res = (expr); \
Review comment:
On that abstract point, I also don't need to hold up the issue for
unrelated changes. I've reverted the change.
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