macos webview_cocoa.c unknown error

[4cecoder]

description

I'm using the master branch in a rust project and it fails to render a webview on macos and the program crashes when instantiating webview
according to my debugger my program just quits when this is hit

Issues lie here:
https://github.com/Boscop/web-view/blob/master/webview-sys/webview_cocoa.c

web-view/src/lib.rs

Line 348 in 82d7cbc

let user_data = Box::new(UserData {

debugger leads

line 61

	if (webview_init(wv) != 0) {
		webview_free(wv);
		return NULL;
	}
	return wv;
}

line 328 in webview_cocoa.c

  id wkPref = ((id(*)(id, SEL))objc_msgSend)((id)__WKPreferences, sel_registerName("new"));

finally src/lib.rs line 348

        let user_data = Box::new(UserData {
            inner: user_data,
            live: Arc::new(RwLock::new(())),
            invoke_handler: Box::new(invoke_handler),
            result: Ok(()),
        });
        let user_data_ptr = Box::into_raw(user_data);

    ### Somethings up with user_data according to the debugging