re PR c++/67544 (ICE: SIGSEGV in tree_check3 (tree.h:2896) with -fconcepts)

2018-09-27  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/67544
	* g++.dg/concepts/pr67544.C: New.

From-SVN: r264665

gcc/testsuite/ChangeLog

 2018-09-27  Paolo Carlini  <paolo.carlini@oracle.com>
 
+	PR c++/67544
+	* g++.dg/concepts/pr67544.C: New.
+
+2018-09-27  Paolo Carlini  <paolo.carlini@oracle.com>
+
 	PR c++/84940
 	* g++.dg/expr/unary4.C: New.
 

gcc/testsuite/g++.dg/concepts/pr67544.C

+// { dg-additional-options "-fconcepts" }
+
+template <typename T> struct A
+{
+  struct B;
+};
+
+struct C
+{
+  template<typename T> friend struct A<T>::B;
+};