re PR c++/87425 (ICE with virtual assignment operator)

	PR c++/87425
	* g++.dg/cpp2a/constexpr-virtual12.C: New test.

From-SVN: r264581

gcc/testsuite/ChangeLog

+2018-09-25  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/87425
+	* g++.dg/cpp2a/constexpr-virtual12.C: New test.
+
 2018-09-25  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/87398

gcc/testsuite/g++.dg/cpp2a/constexpr-virtual12.C

+// PR c++/87425
+// P1064R0
+// { dg-do compile }
+// { dg-options "-std=c++2a" }
+
+struct A
+{
+  virtual A& operator= (int);
+};
+
+struct B
+{
+  A a;
+  B() { a = 0; }
+};