1 files changed, 4 insertions, 0 deletions
diff --git a/lib/AST/MicrosoftMangle.cpp b/lib/AST/MicrosoftMangle.cpp
index b0fc25cfa4..8c31e57578 100644
--- a/lib/AST/MicrosoftMangle.cpp
+++ b/lib/AST/MicrosoftMangle.cpp
@@ -503,6 +503,10 @@ MicrosoftCXXNameMangler::mangleUnqualifiedName(const NamedDecl *ND,
       llvm_unreachable("Can't mangle Objective-C selector names here!");
       
     case DeclarationName::CXXConstructorName:
+      if (ND == Structor) {
+        assert(StructorType == Ctor_Complete &&
+               "Should never be asked to mangle a ctor other than complete");
+      }
       Out << "?0";
       break;