Error types are not imported as supertypes for member resolution

class C(x : Int) : Base(x /*parameter*/), Base1 by Base1(x) {
    val xx : Int // <- this Int used to be resolved to ERROR_CLASS
}

idea/src/org/jetbrains/jet/lang/descriptors/MutableClassDescriptor.java

@@ -120,7 +120,9 @@ public class MutableClassDescriptor extends MutableDeclarationDescriptor impleme
     }
 
     public void addSupertype(@NotNull JetType supertype) {
-        scopeForMemberLookup.importScope(supertype.getMemberScope());
+        if (!ErrorUtils.isErrorType(supertype)) {
+            scopeForMemberLookup.importScope(supertype.getMemberScope());
+        }
         supertypes.add(supertype);
     }