DCHECK tasks posted by TaskRunner::PostTask

base/threading/worker_pool_win.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/threading/worker_pool.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 27 matching lines @@
 
   tracked_objects::ThreadData::TallyRunOnWorkerThreadIfTracking(
       pending_task->birth_tally, pending_task->time_posted, stopwatch);
 
   delete pending_task;
   return 0;
 }
 
 // Takes ownership of |pending_task|
 bool PostTaskInternal(PendingTask* pending_task, bool task_is_slow) {
+  DCHECK(pending_task->task);
+
   ULONG flags = 0;
   if (task_is_slow)
     flags |= WT_EXECUTELONGFUNCTION;
 
   if (!QueueUserWorkItem(WorkItemCallback, pending_task, flags)) {
     DPLOG(ERROR) << "QueueUserWorkItem failed";
     delete pending_task;
     return false;
   }
 
   return true;
 }
 
 }  // namespace
 
 // static
 bool WorkerPool::PostTask(const tracked_objects::Location& from_here,
                           base::Closure task,
                           bool task_is_slow) {
   PendingTask* pending_task = new PendingTask(from_here, std::move(task));
   return PostTaskInternal(pending_task, task_is_slow);
 }
 
 // static
 bool WorkerPool::RunsTasksOnCurrentThread() {
   return GetWorkerPoolRunningOnThisThread()->Get();
 }
 
 }  // namespace base