Quick work around dart2js crashes

dart/pkg/compiler/lib/src/resolution/members.dart

 // Copyright (c) 2012, 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.
 
 part of resolution;
 
 abstract class TreeElements {
   AnalyzableElement get analyzedElement;
   Iterable<Node> get superUses;
 
@@ skipping 1392 matching lines @@
   void resolveFieldInitializer(FunctionElement constructor, SendSet init) {
     // init is of the form [this.]field = value.
     final Node selector = init.selector;
     final String name = selector.asIdentifier().source;
     // Lookup target field.
     Element target;
     if (isFieldInitializer(init)) {
       target = constructor.enclosingClass.lookupLocalMember(name);
       if (target == null) {
         error(selector, MessageKind.CANNOT_RESOLVE, {'name': name});
+        // TODO(ahe): Don't throw, recover from error.
+        throw new CompilerCancelledException(null);
       } else if (target.kind != ElementKind.FIELD) {
         error(selector, MessageKind.NOT_A_FIELD, {'fieldName': name});
         // TODO(ahe): Don't throw, recover from error.
         throw new CompilerCancelledException(null);
       } else if (!target.isInstanceMember) {
         error(selector, MessageKind.INIT_STATIC_FIELD, {'fieldName': name});
       }
     } else {
       error(init, MessageKind.INVALID_RECEIVER_IN_INITIALIZER);
     }
@@ skipping 3585 matching lines @@
 }
 
 /// The result for the resolution of the `assert` method.
 class AssertResult implements ResolutionResult {
   const AssertResult();
 
   Element get element => null;
 
   String toString() => 'AssertResult()';
 }