[all-commits] [llvm/llvm-project] 2c2e43: Create a Template member to be the MemberSpec of a...

[Erich Keane via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2c2e43675910603bab1b163655786e4850569d74
      https://github.com/llvm/llvm-project/commit/2c2e43675910603bab1b163655786e4850569d74
  Author: Erich Keane <ekeane at nvidia.com>
  Date:   2026-07-15 (Wed, 15 Jul 2026)

  Changed paths:
    M clang/lib/Sema/SemaDecl.cpp
    M clang/test/SemaTemplate/class-template-spec.cpp

  Log Message:
  -----------
  Create a Template member to be the MemberSpec of a failed TemplVarDecl (#209604)

Patch #200092 changed to no longer check the previous var template when
setting whether the current one is a member specialization. However, if
the previous one was actually an error case (see the example here and in
the report), we ended up trying to do that anyway, which caused an
assertion.

This patch puts in a 'fake' declaration for the not-found declaration after we 
emit the 'not found' error for the purposes of allowing our diagnostics to
continue evaluating these without causing problems.

Fixes: #209432



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