gcc/testsuite/g++.dg/parse/pr39751.C - gcc - Git at Google

 /* { dg-do compile } */

 template < typename >
 struct A
 {
 A < struct
 {
 f () :

 // { dg-excess-errors "" }
	/* { dg-do compile } */

	template < typename >
	struct A
	{
	A < struct
	{
	f () :

	// { dg-excess-errors "" }