[Bug objc/69844] [6 Regression] Possibly bogus error: unknown type name in ObjC code

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69844

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Reduced testcase:
@class D;

void
foo (void)
{
  for (;;)
    ;
  D *d = (id) 0;
  (void) d;
}