[Bug c/107802] -Wsuggest-attribute=format ignores [[gnu::format(...)]]

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107802

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
          Component|c++                         |c
           Keywords|                            |ice-checking,
                   |                            |ice-on-valid-code
   Last reconfirmed|                            |2022-11-22
     Ever confirmed|0                           |1

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Well Looks like it ICEs on the trunk with -Wsuggest-attribute=format -W -Wall :
```
#include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>

[[gnu::format(printf, 1, 2)]]
void  raise(
     const char* assertionMessage,
     ...) 
 {
     va_list args;
     va_start(args, assertionMessage);
     vfprintf(stderr, assertionMessage, args);
     va_end(args);
     abort();
 }

void f(void)
{
  raise("%s", 1223);
}
```
With both the C and C++ front-ends.

Confirmed.