typecheck erroneous members as dynamic

pkg/compiler/lib/src/typechecker.dart

Index: pkg/compiler/lib/src/typechecker.dart
diff --git a/pkg/compiler/lib/src/typechecker.dart b/pkg/compiler/lib/src/typechecker.dart
index 85710b11d3da5cbf9d040e3dd29402925f1cfc42..2a8ab08ccdc7592f86772f6c29d0f3111b726051 100644
--- a/pkg/compiler/lib/src/typechecker.dart
+++ b/pkg/compiler/lib/src/typechecker.dart
@@ -40,7 +40,7 @@ import 'elements/elements.dart'
         TypeDeclarationElement,
         TypedElement,
         VariableElement;
-import 'resolution/class_members.dart' show MembersCreator;
+import 'resolution/class_members.dart' show MembersCreator, ErroneousMember;
 import 'resolution/tree_elements.dart' show TreeElements;
 import 'tree/tree.dart';
 import 'util/util.dart' show Link, LinkBuilder;
@@ -733,7 +733,11 @@ class TypeCheckerVisitor extends Visitor<DartType> {
         Name name, DartType unaliasedBound, InterfaceType interface) {
       MemberSignature member = lookupMemberSignature(memberName, interface);
       if (member != null) {
-        return new MemberAccess(member);
+        if (member is ErroneousMember) {
+          return const DynamicAccess();
+        } else {
+          return new MemberAccess(member);
+        }
       }
       if (name == const PublicName('call')) {
         if (unaliasedBound.isFunctionType) {