gcc-4.9/gcc/testsuite/gcc.dg/noncompile/incomplete-3.c


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/* Both occurrences of "c" should get diagnostics.  PR 12391.  */
typedef struct { int a; } b_t;

int foo (void)
{
  b_t d;
  struct b_t *c = &d;	/* { dg-warning "incompatible pointer type" } */
  c->a;			/* { dg-error "incomplete type" } */
}