[all-commits] [llvm/llvm-project] 2984a8: [Clang] Fix an iterator invalidation bug in concep...

[Younan Zhang via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2984a8db804e29f31006a24f3ee033bd905894ee
      https://github.com/llvm/llvm-project/commit/2984a8db804e29f31006a24f3ee033bd905894ee
  Author: Younan Zhang <zyn7109 at gmail.com>
  Date:   2025-10-28 (Tue, 28 Oct 2025)

  Changed paths:
    M clang/lib/Sema/SemaConcept.cpp
    M clang/test/SemaTemplate/concepts.cpp

  Log Message:
  -----------
  [Clang] Fix an iterator invalidation bug in concept normalization cache (#165352)

The NormalizationCache may be inserted recursively when normalizing
template arguments with non-dependent default arguments. Since the ADT
doesn't preserve iterator validity, this caused undefined behavior.

This is a regression on trunk so there is no release note.

Fixes https://github.com/llvm/llvm-project/issues/165238



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