Landing: a55bba03ab13
Project / Subsystem
gcc / c++
Date
2026-07-03
Author
Jakub Jelinek
Commit
a55bba03ab13df7140bcf4edd97481e584687d00
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- c++
- patch_id
- —
- commit_hash
- a55bba03ab13df7140bcf4edd97481e584687d00
- source_type
- github
- headline
- c++: Fix up ICEs with some metafns with non-dependent args in templates [PR126036]
- tldr
- Compiler fix prevents ICEs when evaluating metafunctions with non-dependent arguments within templates.
- author
- Jakub Jelinek
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • c++
- • compiler-error
- • template-metaprogramming
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-07-03T00:00:00.000Z
This commit resolves an internal compiler error (ICE) occurring when evaluating C++ metafunctions with non-dependent arguments inside templates. The issue arose because cxx_eval_constant_expression did not handle certain CAST_EXPR forms that potential_constant_expression_1 did. The fix introduces logic to defer constant evaluation of such metafn calls when processing_template_decl is true, preventing the ICE and ensuring correct behavior for constructs like std::array and std::meta::exception objects within templates.