[Bug c++/111703] New: [C++20]Compiler fails when using generic lambda in specific situation

[watanabemakoto.math at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111703

            Bug ID: 111703
           Summary: [C++20]Compiler fails when using generic lambda in
                    specific situation
           Product: gcc
           Version: 13.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: watanabemakoto.math at gmail dot com
  Target Milestone: ---

Consider the example:

```
#include <utility>
using P = std::pair<int, int>;
void (*f)(P);

int main(){
    [](auto) {
        P x;
        f(x);
    };
}
```

GCC 13.2.0 fails to compile the example. Compile option is `-std=c++20` .

Godbolt playground: https://godbolt.org/z/nPMb38ond