https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70852
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> --- /* PR c/70852 */ /* { dg-do compile } */ /* { dg-options "-Wall" } */ extern void *memset (void *, int, __SIZE_TYPE__); extern int A[]; void fn1 (void) { memset (A, 0, 1); }