Landing: 67bc28c6c0c6
Project / Subsystem
gcc / gcc
Date
2026-04-25
Author
Martin Uecker
Commit
67bc28c6c0c68a22280fd0942df598f20e339431
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- gcc
- patch_id
- —
- commit_hash
- 67bc28c6c0c68a22280fd0942df598f20e339431
- source_type
- github
- headline
- c: Fix use of variably-modified structure/union types in nested context
- tldr
- Nested functions now correctly handle variably-modified structure/union types that depend on the enclosing context.
- author
- Martin Uecker
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • c
- • nested functions
- • variably-modified types
- • bugfix
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-04-25T00:00:00.000Z
The compiler now correctly handles variably-modified structure and union types within nested functions when those types depend on the enclosing function’s context. The TYPE_STUB_DECLs are now marked as used, ensuring that the static chain is correctly established for accessing variables in the enclosing scope. This fixes a bug where nested functions would fail to access variably-modified types correctly, potentially leading to incorrect code generation or runtime errors.