1  /* PR c/88065 - ICE in -Wsizeof-pointer-memaccess on an invalid strncpy
       2     PR c/87297 - ICE on strncpy with an undeclared argument
       3     { dg-do compile }
       4     { dg-options "-Wall -Wsizeof-pointer-memaccess" } */
       5  
       6  typedef __SIZE_TYPE__ size_t;
       7  
       8  char* strncpy (char*, const char*, size_t);
       9  
      10  struct A { char a[4], b[6]; };
      11  
      12  void test_invalid_dst (struct A *p)
      13  {
      14    strncpy (q->a, p->b, sizeof p->b);    /* { dg-error ".q. undeclared|not declared" } */
      15  }
      16  
      17  void test_invalid_src (struct A *p)
      18  {
      19    strncpy (p->a, q->b, sizeof p->b);    /* { dg-error ".q. undeclared|not declared" } */
      20  }
      21  
      22  void test_invalid_bound (struct A *p)
      23  {
      24    strncpy (p->a, p->b, sizeof q->b);    /* { dg-error ".q. undeclared|not declared" } */
      25  }
      26  
      27  /* Verify the C++ front end doesn't ICE (the verifies that the fix
      28     for PR c/87297 uses error_operand_p to detect the invalid source
      29     argument rather than just checking its equality to error_mark_node.  */
      30  struct B { char a[4]; };
      31  
      32  void test_cxx_invalid_dst (struct B *p, const char *s)
      33  {
      34    struct T x;	                        /* { dg-error "storage size|incomplete type|unused" } */
      35    __builtin_strncpy (x, s, sizeof p->a);
      36  }