SIGABRT when creating a second instance in a child thread

In trying to work on my project using webview [here](https://github.com/Redrield/elm-ds), I ran into an issue when I tried to open a second webview window in a child thread, the relevant code is

```rust
let (tx, rx) = mpsc::channel::>();
thread::spawn(move || {
let wv = web_view::builder()
.title("Robot Console")
.size(750, 750)
.content(Content::Url("http://localhost:8000/stdout"))
.debug(true)
.user_data(())
.invoke_handler(|_, _| { Ok(()) })
.build().unwrap();

tx.send(wv.handle());

wv.run()
});

self.extra_stdout_handle = Some(rx.recv().unwrap());
self.update_consumer(super_handle);
```

When I reach the branch that calls the function this code resides in, the window begins to open but closes with SIGABRT before any content is loaded, I've run the exec through lldb and gotten the following backtrace https://hasteb.in/avubihan.php. I'm not sure whether this is related to #26 in being cause by a child thread, or whether it's a case of running 2 webview instances in parallel.