[Bug c++/115580] [11/12/13/14/15 regression] null pointer warning from an unevaluated context

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115580

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2024-06-21
             Status|UNCONFIRMED                 |NEW
   Target Milestone|---                         |11.5
            Summary|[11/12/13/14/15 regression] |[11/12/13/14/15 regression]
                   |decltype of nullptr error   |null pointer warning from
                   |with -Werror=nonnull        |an unevaluated context
     Ever confirmed|0                           |1
      Known to fail|                            |11.1.0
      Known to work|                            |10.1.0

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The this pointer case was introduced by r11-6900-gd6f1cf644c45b7 (and )

BUT this has always been an issue:
```
int f(void*) __attribute__((nonnull));

void g()
{
        decltype(f(nullptr)) b;
}
```

This should not warn since we are inside an unevaluated context.