gcc-4.9/gcc/testsuite/gcc.dg/20011008-2.c


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/* { dg-do run } */
/* { dg-options "-O0" } */

extern void abort (void);
extern void exit (int);

struct { union {int x; int y;}; int q; } b;
union { struct {int x;}; int q; } e;

main()
{
  b.y = 10;
  b.x = 15;
  if (b.y != 15)
    abort();

  e.x = 10;
  e.q = 15;
  if (e.x != 15)
    abort();

  exit(0);
}