1 files changed, 11 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/template/ttp4.C b/gcc/testsuite/g++.dg/template/ttp4.C
new file mode 100644
index 000000000..4dff70103
--- /dev/null
+++ b/gcc/testsuite/g++.dg/template/ttp4.C
@@ -0,0 +1,11 @@
+// { dg-do compile }
+// Origin: Ewgenij Gawrilow <gawrilow@math.tu-berlin.de>
+
+// PR c++/6723
+// ICE when default template argument contains instantiation of
+// template template parameter.
+
+template <typename A, typename B,
+	  template <typename,typename> class Predicate,
+	  bool _matches=Predicate<A,B>::answer>
+struct helper { };