fix(bootstrap): fix the configuration of ExceptionHandler

modules/angular2/src/core/application_ref.ts

@@ -1,5 +1,5 @@
 import {NgZone} from 'angular2/src/core/zone/ng_zone';
-import {Type, isBlank, isPresent, assertionsEnabled, print} from 'angular2/src/facade/lang';
+import {Type, isBlank, isPresent, assertionsEnabled, print, IS_DART} from 'angular2/src/facade/lang';
 import {provide, Provider, Injector, OpaqueToken} from 'angular2/src/core/di';
 import {
   APP_COMPONENT_REF_PROMISE,
@@ -412,7 +412,14 @@ export class ApplicationRef_ extends ApplicationRef {
 
         var tickResult = PromiseWrapper.then(compRefToken, tick);
 
-        PromiseWrapper.then(tickResult, (_) => {});
+        // THIS MUST ONLY RUN IN DART.
+        // This is required to report an error when no components with a matching selector found.
+        // Otherwise the promise will never be completed.
+        // Doing this in JS causes an extra error message to appear.
+        if (IS_DART) {
+          PromiseWrapper.then(tickResult, (_) => {});
+        }
+
         PromiseWrapper.then(tickResult, null,
                             (err, stackTrace) => completer.reject(err, stackTrace));
       } catch (e) {

modules/angular2/src/platform/browser_common.ts

@@ -1,4 +1,4 @@
-import {CONST_EXPR} from 'angular2/src/facade/lang';
+import {CONST_EXPR, IS_DART} from 'angular2/src/facade/lang';
 import {provide, Provider, Injector, OpaqueToken} from 'angular2/src/core/di';
 
 import {
@@ -48,7 +48,9 @@ export const BROWSER_PROVIDERS: Array<any /*Type | Provider | any[]*/> = CONST_E
 ]);
 
 function _exceptionHandler(): ExceptionHandler {
-  return new ExceptionHandler(DOM, false);
+  // !IS_DART is required because we must rethrow exceptions in JS,
+  // but must not rethrow exceptions in Dart
+  return new ExceptionHandler(DOM, !IS_DART);
 }
 
 function _document(): any {

modules/angular2/src/platform/worker_render_common.ts

@@ -1,4 +1,4 @@
-import {CONST_EXPR} from 'angular2/src/facade/lang';
+import {CONST_EXPR, IS_DART} from 'angular2/src/facade/lang';
 import {MessageBus} from 'angular2/src/web_workers/shared/message_bus';
 import {NgZone} from 'angular2/src/core/zone/ng_zone';
 import {AnchorBasedAppRootUrl} from 'angular2/src/compiler/anchor_based_app_root_url';
@@ -112,7 +112,7 @@ export function initWebWorkerRenderPlatform(): void {
 }
 
 function _exceptionHandler(): ExceptionHandler {
-  return new ExceptionHandler(DOM, false);
+  return new ExceptionHandler(DOM, !IS_DART);
 }
 
 function _document(): any {