1  /* PR c/11885
       2     Bug: flag4 was allocated into the same byte as the other flags.
       3     { dg-options "" }
       4     { dg-do run } */
       5  
       6  extern void abort (void);
       7  
       8  typedef unsigned char uint8_t;
       9  
      10  typedef struct {
      11      uint8_t flag1:2;
      12      uint8_t flag2:1;
      13      uint8_t flag3:1;
      14     
      15      uint8_t flag4;
      16  
      17  } __attribute__ ((packed)) MyType;
      18  
      19  int main (void)
      20  {
      21    MyType a;
      22    MyType *b = &a;
      23  
      24    b->flag1 = 0;
      25    b->flag2 = 0;
      26    b->flag3 = 0;
      27  
      28    b->flag4 = 0;
      29  
      30    b->flag4++;
      31      
      32    if (b->flag1 != 0)
      33      abort ();
      34  
      35    return 0;
      36  }