fixes #206, add checking for unary ops

lib/runtime/dart/_isolate_helper.js

 var _isolate_helper = dart.defineLibrary(_isolate_helper, {});
 var core = dart.import(core);
 var _native_typed_data = dart.import(_native_typed_data);
 var _interceptors = dart.lazyImport(_interceptors);
 var _js_helper = dart.lazyImport(_js_helper);
 var isolate = dart.import(isolate);
 var _foreign_helper = dart.import(_foreign_helper);
 var _js_embedded_names = dart.import(_js_embedded_names);
 var collection = dart.import(collection);
 var async = dart.import(async);
@@ skipping 571 matching lines @@
           exports._globalState.topEventLoop.prequeue(event);
         }
         this.isPaused = false;
       }
       this[_updateGlobalState]();
     }
     addDoneListener(responsePort) {
       if (this.doneHandlers == null) {
         this.doneHandlers = [];
       }
-      if (dart.dsend(this.doneHandlers, 'contains', responsePort))
+      if (dart.as(dart.dsend(this.doneHandlers, 'contains', responsePort), core.bool))

[vsm, 2015/06/04 17:07:32]

We'll need a null check here as well.

[Jennifer Messerly, 2015/06/04 21:54:18]

Done.

         return;
       dart.dsend(this.doneHandlers, 'add', responsePort);
     }
     removeDoneListener(responsePort) {
       if (this.doneHandlers == null)
         return;
       dart.dsend(this.doneHandlers, 'remove', responsePort);
     }
     setErrorsFatal(authentification, errorsAreFatal) {
       if (!dart.equals(this.terminateCapability, authentification))
@@ skipping 79 matching lines @@
             throw e;
           }
         }
       }
  finally {
         this[_isExecutingEvent] = false;
         exports._globalState.currentContext = old;
         if (old != null)
           old[_setGlobals]();
         if (this[_scheduledControlEvents] != null) {
-          while (dart.dload(this[_scheduledControlEvents], 'isNotEmpty')) {
+          while (dart.as(dart.dload(this[_scheduledControlEvents], 'isNotEmpty'), core.bool)) {
             dart.dcall(dart.dsend(this[_scheduledControlEvents], 'removeFirst'));
           }
         }
       }
       return result;
     }
     [_setGlobals]() {
       _foreign_helper.JS_SET_CURRENT_ISOLATE(this.isolateStatics);
     }
     handleControlMessage(message) {
@@ skipping 854 matching lines @@
   exports.leaveJsAsync = leaveJsAsync;
   exports.isWorker = isWorker;
   exports.startRootIsolate = startRootIsolate;
   exports.IsolateNatives = IsolateNatives;
   exports.RawReceivePortImpl = RawReceivePortImpl;
   exports.ReceivePortImpl = ReceivePortImpl;
   exports.TimerImpl = TimerImpl;
   exports.hasTimer = hasTimer;
   exports.CapabilityImpl = CapabilityImpl;
 })(_isolate_helper, core, _native_typed_data, _interceptors, _js_helper, isolate, _foreign_helper, _js_embedded_names, collection, async);