Thanks that got me past that step. 

On Sunday, April 24, 2016 at 10:42:14 AM UTC-5, Ben Noordhuis wrote:
>
> On Sat, Apr 23, 2016 at 10:19 PM, Stephen James <[email protected] 
> <javascript:>> wrote: 
> > Attempting to call from c++ to v8 using async.c using 
> Nan::New<v8::String>() 
> > I keep ending up with the following 
> > abort. 
> > 
> > void EventConnectedAsync(uv_async_t *handle) 
> > { 
> >   if (!EventConnectedCB.IsEmpty()) 
> >   { 
> >     cout << (char*)handle->data << endl; 
> >     const char* url = (const char*)handle->data; 
> >     v8::Local<v8::Value> argv[] = { 
> > Nan::New<v8::String>(url).ToLocalChecked() };  // at node_nzape_cb.cc:36 
> > 
> >     Nan::MakeCallback(Nan::GetCurrentContext()->Global(), 
> EventConnectedCB, 
> > 1, argv); 
> > 
> >     delete [] (char*)handle->data; 
> >   } 
> > } 
> > 
> > 00007F869F3407B0 _ZL12getBackTracev 
> > 00007F869F340DE7 _ZL19signalSevereHandleri 
> > 00007F86A1B66CC9 gsignal 
> > 00007F86A1B6A0D7 abort 
> > 0000000000DFB22B _ZN4nodeL12OnFatalErrorEPKcS1_ 
> > 00000000008CA0D4 _ZN2v85Utils16ReportApiFailureEPKcS2_ 
> > 0000000000A9843E _ZN2v88internal11HandleScope6ExtendEPNS0_7IsolateE 
> > 00000000008E3D00 
> > 
> _ZN2v88internal11HandleScope12CreateHandleINS0_6ObjectEEEPPT_PNS0_7IsolateES5_
>  
>
> > 0000000000A79A2A 
> > _ZN2v88internal7Factory19NewRawOneByteStringEiNS0_13PretenureFlagE 
> > 0000000000A792E2 
> > 
> _ZN2v88internal7Factory20NewStringFromOneByteENS0_6VectorIKhEENS0_13PretenureFlagE
>  
>
> > 0000000000A79F92 
> > 
> _ZN2v88internal7Factory17NewStringFromUtf8ENS0_6VectorIKcEENS0_13PretenureFlagE
>  
>
> > 00000000008DA092 
> > _ZN2v86String11NewFromUtf8EPNS_7IsolateEPKcNS_13NewStringTypeEi 
> > 00007F869F8FF84F Nan::imp::Factory<v8::String>::New(char const*, int) at 
> > nan_implementation_12_inl.h:265 
> > 00007F869F8FFE2B Nan::imp::Factory<v8::String>::return_t 
> > Nan::New<v8::String, char const*>(char const*) at nan_new.h:208 
> > 00007F869F901061 EventConnectedAsync(uv_async_s*) at node_nzape_cb.cc:36 
> > 0000000000FBF91A uv__async_event at async.c:98 
> > 0000000000FBF9F2 uv__async_io at async.c:138 
> > 0000000000FCFA34 uv__io_poll at linux-core.c:345 
> > 0000000000FC04D5 uv_run at core.c:351 
> > 0000000000E088AF _ZN4node5StartEiPPc 
> > 00007F86A1B51EC4 __libc_start_main 
> > Build:  Date:Apr 19 2016 13:26:06  Version:10037 
> > Aborted (core dumped) 
> > nzos@nzos-VirtualBox:~/Development/node-nzape$ nodejs 
> > The program 'nodejs' is currently not installed. You can install it by 
> > typing: 
> > sudo apt-get install nodejs 
> > nzos@nzos-VirtualBox:~/Development/node-nzape$ node --version 
> > v5.10.1 
>
> It looks like you're missing a v8::HandleScope or Nan::HandleScope at 
> the top of your function. 
>
> Aside: using uv_async_t.data like that is potentially unsafe.  You 
> need proper synchronization (e.g. with a mutex) when multiple threads 
> access the .data field.  Also, remember there is no 1-to-1 
> relationship between calls to uv_async_send() and your callback. 
>

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