Landing: c1a660d44be3
Project / Subsystem
gcc / libstdc++
Date
2026-10-01
Author
Jonathan Wakely
Commit
c1a660d44be3dc140b7ff24611e8ff7a4557d761
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- libstdc++
- patch_id
- —
- commit_hash
- c1a660d44be3dc140b7ff24611e8ff7a4557d761
- source_type
- github
- headline
- libstdc++: Fix debug mode for pb_ds ordered-vector trees
- tldr
- Fixes rare debug mode assertions in pb_ds ordered-vector trees that could be triggered by time-based seeds or incorrect memory allocation.
- author
- Jonathan Wakely
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • libstdc++
- • debug
- • bugfix
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-10-01T00:00:00.000Z
This commit addresses rare debug mode assertions in libstdc++‘s policy-based data structures (pb_ds) ordered-vector trees. It introduces a way to override the time-based random seed for reliable failure triggering and fixes an exception-safety bug in erase_if where container modifications were not rolled back. Additionally, it corrects an issue in erase(It) that caused a crash when deallocating the last element and makes copy_from_ordered_range safer by preventing allocation of zero-sized memory.