Use failedAt in more places

pkg/compiler/lib/src/enqueue.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.
 
 library dart2js.enqueue;
 
 import 'dart:collection' show Queue;
 
 import 'common/tasks.dart' show CompilerTask;
 import 'common/work.dart' show WorkItem;
@@ skipping 212 matching lines @@
     _impactVisitor = new EnqueuerImplImpactVisitor(this);
   }
 
   ResolutionWorldBuilder get worldBuilder => _worldBuilder;
 
   bool get queueIsEmpty => _queue.isEmpty;
 
   @override
   void checkQueueIsEmpty() {
     if (_queue.isNotEmpty) {
-      throw new SpannableAssertionFailure(
-          _queue.first.element, "$name queue is not empty.");
+      failedAt(_queue.first.element, "$name queue is not empty.");
     }
   }
 
   Iterable<ClassEntity> get processedClasses => _worldBuilder.processedClasses;
 
   void applyImpact(WorldImpact worldImpact, {var impactSource}) {
     if (worldImpact.isEmpty) return;
     impactStrategy.visitImpact(
         impactSource, worldImpact, _impactVisitor, impactUse);
   }
@@ skipping 183 matching lines @@
   }
 
   /// Create a [WorkItem] for [entity] and add it to the work list if it has not
   /// already been processed.
   void _addToWorkList(MemberEntity entity) {
     if (_processedEntities.contains(entity)) return;
     WorkItem workItem = _workItemBuilder.createWorkItem(entity);
     if (workItem == null) return;
 
     if (queueIsClosed) {
-      throw new SpannableAssertionFailure(
+      failedAt(
           entity, "Resolution work list is closed. Trying to add $entity.");
     }
 
     applyImpact(listener.registerUsedElement(entity),
         impactSource: 'used element');
     _worldBuilder.registerUsedElement(entity);
     _queue.add(workItem);
   }
 
   /// Adds an action to the deferred task queue.
   /// The action is performed the next time the resolution queue has been
   /// emptied.
   ///
   /// The queue is processed in FIFO order.
   void addDeferredAction(DeferredAction deferredAction) {
     if (queueIsClosed) {
-      throw new SpannableAssertionFailure(
+      failedAt(
           deferredAction.element,
           "Resolution work list is closed. "
           "Trying to add deferred action for ${deferredAction.element}");
     }
     _deferredQueue.add(deferredAction);
   }
 
   void addDeferredActions(Iterable<DeferredAction> deferredActions) {
     deferredActions.forEach(addDeferredAction);
   }
@@ skipping 131 matching lines @@
   final Entity element;
   final DeferredActionFunction action;
 
   DeferredAction(this.element, this.action);
 }
 
 /// Interface for creating work items for enqueued member entities.
 abstract class WorkItemBuilder {
   WorkItem createWorkItem(covariant MemberEntity entity);
 }