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From: "stevenxia990430 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/110106] New: ICE on noexcept(noexcept(...)) with optional
Date: Sat, 03 Jun 2023 18:18:22 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 12.1.0
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110106

            Bug ID: 110106
           Summary: ICE on noexcept(noexcept(...)) with optional
           Product: gcc
           Version: 12.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: stevenxia990430 at gmail dot com
  Target Milestone: ---

The following program produces internal compiler error: Segmentation fault.
Tested on GCC-trunk. Note replacing the std::optional<int>{z} inside the
noexcept with just {z} compiles with failure.=20

To quickly reproduce: https://gcc.godbolt.org/z/dhjETE7K3
```
#include <optional>

namespace x {
void y(std::optional<int> z) noexcept(noexcept(std::optional<int>{z})) {}
}

int main() {

}
```


tested this on clang-trunk and it successfully compiles.=