[all-commits] [llvm/llvm-project] 1ddfb9: [Sema] Fix crash in __builtin_dump_struct with -We...

[Krisitan Erik Olsen via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1ddfb94fa6c645af9e10ad4946d9b7aea3c46454
      https://github.com/llvm/llvm-project/commit/1ddfb94fa6c645af9e10ad4946d9b7aea3c46454
  Author: Krisitan Erik Olsen <kristian.erik at outlook.com>
  Date:   2026-07-30 (Thu, 30 Jul 2026)

  Changed paths:
    M clang/docs/ReleaseNotes.md
    M clang/lib/Sema/SemaChecking.cpp
    A clang/test/CodeGenCXX/GH211943.cpp

  Log Message:
  -----------
  [Sema] Fix crash in __builtin_dump_struct with -Werror -Wformat-pedantic (#212377)

`DiagnosticErrorTrap::hasErrorOccurred()` treats warnings promoted to
errors by `-Werror` as real errors, causing `BuiltinDumpStructGenerator`
to bail out before building the `PseudoObjectExpr` wrapper. CodeGen then
encounters the untransformed `CallExpr` with a placeholder builtin type
and hits `llvm_unreachable` in `CodeGenTypes::ConvertType`.
Use `hasUnrecoverableErrorOccurred()` instead, which ignores `-Werror`
promoted warnings and only bails on genuine compilation errors.

Fixes #211943



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