re PR c++/89315 (Cannot convert to std::initializer_list - fails with gcc9 works with gcc8)

PR c++/89315
	* g++.dg/cpp0x/initlist114.C: New test.

From-SVN: r268971

gcc/testsuite/ChangeLog

@@ -5,6 +5,9 @@
 
 	* g++.old-deja/g++.robertl/eb82.C: Tweak dg-error.
 
+	PR c++/89315
+	* g++.dg/cpp0x/initlist114.C: New test.
+
 2019-02-16  David Malcolm  <dmalcolm@redhat.com>
 
 	PR c++/88680

gcc/testsuite/g++.dg/cpp0x/initlist114.C

@@ -0,0 +1,21 @@
+// PR c++/89315
+// { dg-do compile { target c++11 } }
+
+#include <initializer_list>
+
+struct bar {
+    bar(std::initializer_list<int>, int = int());
+};
+
+struct i {
+    const bar & invitees;
+};
+
+template <typename = void> struct n {
+public:
+    void m_fn1() { i{{}}; }
+};
+
+struct o : n<> {
+    void p() { m_fn1(); }
+};