Landing: a4ceb702480b
Project / Subsystem
gcc / libstdc++
Date
2026-06-26
Author
Yan Churkin
Commit
a4ceb702480b9f46dd9b862c81ad7505ca344286
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- libstdc++
- patch_id
- —
- commit_hash
- a4ceb702480b9f46dd9b862c81ad7505ca344286
- source_type
- github
- headline
- Libstdc++: Avoid past-the-end iterator dereference with overloaded operator&&.
- tldr
- Libstdc++ algorithms now prevent dereferencing past-the-end iterators when custom operator&& is used in loop conditions.
- author
- Yan Churkin
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • libstdc++
- • algorithm
- • iterator
- • bugfix
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-06-26T00:00:00.000Z
This commit addresses an issue in libstdc++ algorithms like std::__find_if and std::__mismatch where custom overloaded operator&& could lead to dereferencing past-the-end iterators. Such custom operators, if not designed for short-circuiting, would evaluate their operands even when the loop condition indicated the end of the range. The fix forces the predicate result to bool, ensuring the use of the built-in, short-circuiting && operator and preventing the dereference of invalid iterators.