// Various struct lookup tests.  We didn't used to complain about// the definition of C.struct A;typedef struct A B;		// { dg-error "previous declaration" }struct B;			// { dg-error "conflicting declaration" }typedef struct { int i; } C;	// { dg-error "previous declaration" }struct C;			// { dg-error "conflicting declaration" }struct D;typedef struct D D;typedef struct D { int i; } D;typedef struct D D;