HandleOKCallback crash

Question

Hi below code is crashing when i perform if check on argv[1]. Please help to fix it, while assigning the value to argv[1] i need to check if bool variable checktrue is true assign string value else assign int value as below code.

void DispatchEventWorker::HandleOKCallback() {
  v8::Local<v8::Value> argv[2];
    argv[0]= Nan::New<v8::String>(structdata.value1).ToLocalChecked();

if(checktrue)
     {
             argv[1] = Nan::New<v8::Number>(structdata.value2).ToLocalChecked();

     }
else
 {
          argv[1] = Nan::New<v8::String>(structdata.value3);
 }
  callback->Call(2, argv);
}

Note output : Process 123432098 (node) terminated SIGSEGV code=1 fltno=11 ip=0000000001076a08(/usr/lib/ldqnx-64.so.2@memcpy+0x0000000000000048) mapaddr=0000000000076a08. ref=2073696874206f74

Answer 1

First, I suggest you always include the async_resource when calling back JS or otherwise some Node.js features won't work:

this->callback->Call(2, argv, this->async_resource);

Then, your code is missing a .ToLocalChecked() on argv[1] and does not compile in its current form.

Otherwise there is nothing fundamentally wrong with it and most probably the crash is not Node.js related - maybe one of these values is a null pointer.