Don’t exit prematurely if compilation failed.

dart/pkg/compiler/lib/src/elements/modelx.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library elements.modelx;
 
 import 'elements.dart';
 import '../constants/expressions.dart';
 import '../helpers/helpers.dart';  // Included for debug helpers.
 import '../tree/tree.dart';
@@ skipping 495 matching lines @@
       set.add(ambiguous.newElement);
       element = ambiguous.existingElement;
     }
     set.add(element);
     return set;
   }
 
   accept(ElementVisitor visitor) => visitor.visitAmbiguousElement(this);
 
   bool get isTopLevel => false;
+
+  DynamicType get type => const DynamicType();
 }
 
 /// Element synthesized to diagnose an ambiguous import.
 class AmbiguousImportX extends AmbiguousElementX {
   AmbiguousImportX(
       MessageKind messageKind,
       Map messageArguments,
       Element enclosingElement, Element existingElement, Element newElement)
       : super(messageKind, messageArguments, enclosingElement, existingElement,
               newElement);
@@ skipping 2514 matching lines @@
   AstElement get definingElement;
 
   bool get hasResolvedAst => definingElement.hasTreeElements;
 
   ResolvedAst get resolvedAst {
     return new ResolvedAst(declaration,
         definingElement.node, definingElement.treeElements);
   }
 
 }