[Bug c++/115818] New: Infinite recursive in noexcept operator is not detected

[fchelnokov at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115818

            Bug ID: 115818
           Summary: Infinite recursive in noexcept operator is not
                    detected
           Product: gcc
           Version: 14.1.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: fchelnokov at gmail dot com
  Target Milestone: ---

This program
```
struct C {
    void f() noexcept(noexcept(f())) {}
};
```
is rejected by both Clang and MSVC, because noexcept of f() is defined with
infinite recursion. But GCC accepts the program, which looks wrong.

Online demo: https://gcc.godbolt.org/z/abTc7sG4v

Original discussion: https://stackoverflow.com/q/74015227/7325599