1  /* PR tree-optimization/84238 */
       2  /* { dg-do compile } */
       3  /* { dg-options "-O2" } */
       4  /* { dg-require-effective-target alloca } */
       5  
       6  char a[1];
       7  int b;
       8  char *strncpy (char *, char *, __SIZE_TYPE__);
       9  void
      10  c ()
      11  {
      12    char d[b];
      13    strncpy (a, &d[3], 3); /* { dg-warning "writing 3 bytes into a region of size 1" } */
      14  }