[heap] Cancel tasks before tearing down the heap.

src/isolate.cc

 // Copyright 2012 the V8 project 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 "src/isolate.h"
 
 #include <stdlib.h>
 
 #include <fstream>  // NOLINT(readability/streams)
 #include <sstream>
@@ skipping 2164 matching lines @@
   delete external_reference_table_;
   external_reference_table_ = NULL;
   delete external_reference_map_;
   external_reference_map_ = NULL;
 }
 
 
 void Isolate::Deinit() {
   TRACE_ISOLATE(deinit);
 
+  cancelable_task_manager()->CancelAndWait();
+
   debug()->Unload();
 
   FreeThreadResources();
 
   if (concurrent_recompilation_enabled()) {
     optimizing_compile_dispatcher_->Stop();
     delete optimizing_compile_dispatcher_;
     optimizing_compile_dispatcher_ = NULL;
   }
 
@@ skipping 30 matching lines @@
 
   delete heap_profiler_;
   heap_profiler_ = NULL;
 
   heap_.TearDown();
   logger_->TearDown();
 
   delete interpreter_;
   interpreter_ = NULL;
 
-  cancelable_task_manager()->CancelAndWait();
-
   delete cpu_profiler_;
   cpu_profiler_ = NULL;
 
   code_event_dispatcher_.reset();
 
   delete root_index_map_;
   root_index_map_ = NULL;
 
   ClearSerializerData();
 }
@@ skipping 1204 matching lines @@
   // Then check whether this scope intercepts.
   if ((flag & intercept_mask_)) {
     intercepted_flags_ |= flag;
     return true;
   }
   return false;
 }
 
 }  // namespace internal
 }  // namespace v8