[Bug c/98487] ICE: tree check: expected identifier_node, have tree_list in is_attribute_p, at attribs.h:155 [C2X attribute syntax, gnu::format and -Wsuggest-attribute=format]

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98487

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ice-checking
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2021-11-25

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.
Simplier testcase:
#include <stdarg.h>


[[gnu::__format__(__printf__, 1, 2)]]
void
do_printf(const char * const a0, ...)
  {
  va_list ap;
  va_start(ap, a0);
  __builtin_vprintf(a0, ap);
  va_end(ap);
  }

[[gnu::__format__(__scanf__, 1, 2)]]
void
do_scanf(const char * const a0, ...)
  {
  va_list ap;
  va_start(ap, a0);
  __builtin_vscanf(a0, ap);
  va_end(ap);
  }

[[gnu::__format__(__strftime__, 1, 0)]]
void
do_strftime(const char * const a0, struct tm * a1)
  {
  char buff[256];
  __builtin_strftime(buff, sizeof(buff), a0, a1);
  puts(buff);
  }