Index: lib/Sema/SemaInit.cpp
===================================================================
--- lib/Sema/SemaInit.cpp
+++ lib/Sema/SemaInit.cpp
@@ -4087,6 +4087,12 @@
     = S.CompareReferenceRelationship(DeclLoc, cv1T1, cv2T2, DerivedToBase,
                                      ObjCConversion, ObjCLifetimeConversion);
 
+
+  if (isLValueRef && (!T1Quals.hasVolatile() && T2Quals.hasVolatile())) {
+    Sequence.SetFailed(InitializationSequence::FK_ReferenceInitDropsQualifiers);
+    return;
+  }
+
   // C++0x [dcl.init.ref]p5:
   //   A reference to type "cv1 T1" is initialized by an expression of type
   //   "cv2 T2" as follows: