1 files changed, 62 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/cpp0x/regress/regress4.C b/gcc/testsuite/g++.dg/cpp0x/regress/regress4.C
new file mode 100644
index 0000000000..b56263ae5a
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/regress/regress4.C
@@ -0,0 +1,62 @@
+// PR c++/49663
+// { dg-options -std=c++0x }
+
+struct Nosm
+{
+    int m_R;
+};
+
+namespace dx {
+
+    struct onc
+    {
+        typedef void(*Cb)();
+
+        onc(Cb cb);
+    };
+
+    struct grac
+    {
+        template<class Derived> static void once();
+    };
+
+    template<class Derived>
+        struct tonc : onc
+        {
+            tonc() : onc(&grac::once<Derived>) {}
+
+            static Derived& get();
+        };
+
+    template<class Derived> void grac::once()
+    {
+        tonc<Derived>::get().h();
+    }
+}
+
+namespace
+{
+    template<typename T, int = sizeof(&T::m_R)>
+        struct has_R { };
+
+    template<typename T>
+        inline void
+        setR(T* m, has_R<T>* = 0)
+        { }
+
+    inline void setR(...) { }
+}
+
+template<typename M>
+    struct Qmi
+    : dx::tonc<Qmi<M> >
+    {
+        void h()
+        {
+            setR(&msg);
+        }
+
+        M msg;
+    };
+
+Qmi<Nosm> x;