[Bug c++/118516] [12/13/14/15 Regression] Misleading error message "call to non-'constexpr' function" when loop variable is not declared

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118516

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2025-01-16
            Summary|Misleading error message    |[12/13/14/15 Regression]
                   |"call to non-'constexpr'    |Misleading error message
                   |function" when loop         |"call to non-'constexpr'
                   |variable is not declared    |function" when loop
                   |                            |variable is not declared
   Target Milestone|---                         |12.5
             Status|UNCONFIRMED                 |NEW
      Known to fail|                            |9.1.0
      Known to work|                            |8.5.0
     Ever confirmed|0                           |1

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.
Extracted testcase:
```
int foo();
int main()
{
    for (int id = 0; i < foo(); ++id);
}
```