fix intermittent failure in HeapVectorTypes.SimpleSetTest#2554
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ahornby wants to merge 1 commit intofacebook:mainfrom
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fix intermittent failure in HeapVectorTypes.SimpleSetTest#2554ahornby wants to merge 1 commit intofacebook:mainfrom
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Summary: Fix intermittent failure in HeapVectorTypes.SimpleSetTest. When 32 isn’t present and all elements are <32, lower_bound(32) legitimately returns end(). The test immediately did if (*it == 32), which dereferences an end iterator, causing UB. Added a guard it == s2.end() before dereferencing. There was also flakiness if 32 is present and if s2.lower_bound(32); returned a lower value than 32 as then 32 not erased. Fixed by explicity erasing 32 before insert Differential Revision: D88592733
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Jan 12, 2026
) Summary: Fix intermittent failure in HeapVectorTypes.SimpleSetTest. When 32 isn’t present and all elements are <32, lower_bound(32) legitimately returns end(). The test immediately did if (*it == 32), which dereferences an end iterator, causing UB. Added a guard it == s2.end() before dereferencing. There was also flakiness if 32 is present and if s2.lower_bound(32); returned a lower value than 32 as then 32 not erased. Fixed by explicity erasing 32 before insert Differential Revision: D88592733
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Summary:
Fix intermittent failure in HeapVectorTypes.SimpleSetTest. When 32 isn’t present and all elements are <32, lower_bound(32) legitimately returns end(). The test immediately did if (*it == 32), which dereferences an end iterator, causing UB.
Added a guard it == s2.end() before dereferencing.
There was also flakiness if 32 is present and if s2.lower_bound(32); returned a lower value than 32 as then 32 not erased. Fixed by explicity erasing 32 before insert
Differential Revision: D88592733