Don't run the second pass of the pending phantom callbacks if the heap has been torn down.

src/isolate.h

Index: src/isolate.h
diff --git a/src/isolate.h b/src/isolate.h
index 42e22b4fd248b263a9de051da6f7ad6b73276339..58e1c098f05e1e5739ba213f6dbd55d43c88a2ec 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -6,11 +6,13 @@
 #define V8_ISOLATE_H_
 
 #include <queue>
+#include <set>

[jochen (gone - plz use gerrit), 2015/07/20 13:37:20]

nit. empty line after this one

[epertoso, 2015/07/20 13:40:20]

Done.

 #include "include/v8-debug.h"
 #include "src/allocation.h"
 #include "src/assert-scope.h"
 #include "src/base/atomicops.h"
 #include "src/builtins.h"
+#include "src/cancelable-task.h"
 #include "src/contexts.h"
 #include "src/date.h"
 #include "src/execution.h"
@@ -1133,6 +1135,9 @@ class Isolate {
 
   FutexWaitListNode* futex_wait_list_node() { return &futex_wait_list_node_; }
 
+  void RegisterCancelableTask(CancelableTask* task);
+  void RemoveCancelableTask(CancelableTask* task);
+
  protected:
   explicit Isolate(bool enable_serializer);
 
@@ -1368,6 +1373,8 @@ class Isolate {
 
   FutexWaitListNode futex_wait_list_node_;
 
+  std::set<CancelableTask*> cancelable_tasks_;
+
   friend class ExecutionAccess;
   friend class HandleScopeImplementer;
   friend class OptimizingCompileDispatcher;