v8 Persistent SetWeak崩溃，出现NEAR_DEATH

我的代码：

struct WeakData {
    context* c;
    std::vector<UniquePersistent<Object>>::iterator i;
};
void WeakPtrCallback(const v8::WeakCallbackData<v8::Object, WeakData>& data) {
    printf("weak callback");
    fflush(stdout);
    // crashes always after exit from this callback
}
Local<Object> wrapDocumentSelection(Isolate* isolate, cDocumentSelection* selection) {
    EscapableHandleScope handle_scope(isolate);
    auto ctx = isolate->GetCurrentContext();
    Context::Scope context_scope(ctx);
    Local<External> contextWrap = Local<External>::Cast(
            Handle<Object>::Cast(isolate->GetCurrentContext()->Global()->GetPrototype())->GetInternalField(0));
    context* c = static_cast<context*>(contextWrap->Value());
    Local<ObjectTemplate> documentSelectionTemplate = Local<ObjectTemplate>::New(isolate, c->documentSelectionTemplate);
    Local<Object> jsSelection = documentSelectionTemplate->NewInstance(ctx).ToLocalChecked();
    jsSelection->SetInternalField(0, External::New(isolate, selection));
    jsSelection->Set(ctx, String::NewFromUtf8(isolate, "length"), Integer::New(isolate, selection->Length));
    c->trackingObjects.push_back(UniquePersistent<Object>(isolate, jsSelection));
    auto &p = c->trackingObjects.back();
    auto it = c->trackingObjects.end();
    it--;
    WeakData* wd = new WeakData;
    wd->c = c;
    wd->i = it;
    p.Reset(isolate, jsSelection);
    p.SetWeak<WeakData>(NULL, WeakPtrCallback);
    isolate->AdjustAmountOfExternalAllocatedMemory(1024);
    return handle_scope.Escape(jsSelection);
}

在上下文中，我保留所有持久句柄的向量在WeakPtrCallback中，我需要清理一些外部分配的资源

v8错误：

#
# Fatal error in ../src/global-handles.cc, line 325
# Check failed: state() != NEAR_DEATH.
#

关于https://strongloop.com/strongblog/node-js-v0-12-c-apis-breaking/我不需要在回调中执行任何与v8相关的清理

持久化的存储单元将自动处理。如果你想用.ClearWeak（）.恢复它，请保留对原始v8:：Persistent的引用

我还试着使用Persistent和Persistent<Value, CopyablePersistentTraits<Value>>——同样的错误。。。有什么建议吗？