1 files changed, 16 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/cpp0x/collapse-bug.C b/gcc/testsuite/g++.dg/cpp0x/collapse-bug.C
new file mode 100644
index 000000000..02a59cd1d
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/collapse-bug.C
@@ -0,0 +1,16 @@
+// { dg-options "--std=c++0x" }
+template<typename T, typename U> struct same_type;
+template<typename T> struct same_type<T, T> {};
+
+template <typename T>
+struct S
+{
+  typedef T const (&type)();
+};
+
+void f()
+{
+  // initial implementation didn't ignore const qualifier on
+  // reference, resulting in a typedef of 'const int& (&)()'
+  same_type<S<int &>::type, int&(&)()>();
+}