[all-commits] [llvm/llvm-project] 8322a3: Avoid accessing unset optional, workaround for #10...

[Alexander Kornienko via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8322a3085c902de9759a40ccdcd194a4c46e7185
      https://github.com/llvm/llvm-project/commit/8322a3085c902de9759a40ccdcd194a4c46e7185
  Author: Alexander Kornienko <alexfh at google.com>
  Date:   2024-07-26 (Fri, 26 Jul 2024)

  Changed paths:
    M clang/lib/Sema/SemaTemplateDeduction.cpp
    A clang/test/SemaCXX/pr100095.cpp

  Log Message:
  -----------
  Avoid accessing unset optional, workaround for #100095 (#100408)

This patch avoids accessing an unset `std::optional<>`, which is a part
of the manifestation of #100095. The other part is an assertion failure
that is not addressed here. This is not a proper fix, but enables Clang
to continue working with more libc++ runtime checks enabled
(specifically, `-D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_FAST`,
which checks access to unset optionals among other things). A proper fix
is being discussed on #100095.



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