patch to prevent crash in hopelessly incorrect

method definition with labels.

llvm-svn: 80381

clang/lib/Sema/SemaDeclObjC.cpp

@@ -1664,6 +1664,7 @@ Sema::DeclPtrTy Sema::ActOnMethodDeclaration(
   // Make sure we can establish a context for the method.
   if (!ClassDecl) {
     Diag(MethodLoc, diag::error_missing_method_context);
+    FunctionLabelMap.clear();
     return DeclPtrTy();
   }
   QualType resultDeclType;