Landing: 0bcb57a2294f
Project / Subsystem
gcc / libstdc++
Date
2026-07-03
Author
Tomasz Kamiński
Commit
0bcb57a2294fbadfa8388bdc3a5be356ad3cf91c
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- libstdc++
- patch_id
- —
- commit_hash
- 0bcb57a2294fbadfa8388bdc3a5be356ad3cf91c
- source_type
- github
- headline
- libstdc++ validates stride values for layout_stride
- tldr
- layout_stride now validates user-provided strides to prevent negative or unrepresentable values, improving robustness.
- author
- Tomasz Kamiński
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • libstdc++
- • mdspan
- • validation
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-07-03T00:00:00.000Z
The layout_stride class in libstdc++ now validates user-provided stride values. The conversion of these strides using __index_type_cast now includes assertions to ensure they are non-negative and fit within the index_type, preventing potential errors and undefined behavior. A new test case stride_neg.cc has been added to verify this validation.