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/* { dg-do compile } */
/* { dg-options "-fplan9-extensions" } */
 
/* Test for ambiguity when using the Plan 9 extensions.  */
 
struct A {
  char a;		/* { dg-error "duplicate member" } */
};
 
struct B
{
  struct A;
  struct A;
};
 
char
f1 (struct B *p)
{
  return p->a;		/* { dg-error "no member" } */
}
 
void
f2 (struct A *p)	/* { dg-message "expected" } */
{
}
 
void
f3 (struct B *p)
{
  f2 (p);		/* { dg-warning "incompatible pointer type" } */
}
 
struct C
{
  char c;		/* { dg-error "duplicate member" } */
};
 
struct D
{
  struct C;
};
 
struct E
{
  struct C;
  struct D;
};
 
char
f4 (struct E *p)
{
  return p->c;		/* { dg-error "no member" } */
}
 
void
f6 (struct C *p)	/* { dg-message "expected" } */
{
}
 
void
f7 (struct E *p)
{
  f6 (p);		/* { dg-warning "incompatible pointer type" } */
}
 
struct A
f8 (struct B *p)
{
  return p->A;		/* { dg-error "no member" } */
}
 
struct C
f9 (struct E *p)
{
  return p->C;		/* { dg-error "no member" } */
}