missing marshaler for type

[biter777]

I try to use a exapmle:

	gtk.Init(nil)
	go func() {
		runtime.LockOSThread()
		gtk.Main()
	}()

	ctx := webloop.New()
	view := ctx.NewView()
	defer view.Close()
	view.Open("http://google.com")
	err := view.Wait()      // error in runtime
	if err != nil {
		fmt.Fprintf(os.Stderr, "Failed to load URL: %s", err)
		os.Exit(1)
	}
	res, err := view.EvaluateJavaScript("document.title")
	if err != nil {
		fmt.Fprintf(os.Stderr, "Failed to run JavaScript: %s", err)
		os.Exit(1)
	}
	fmt.Printf("JavaScript returned: %q\n", res)

It compiles, but gives an error in runtime:
"warning: no suitable Go value from object for arg 0: missing marshaler for type"

go1.12.7 linux/amd64
Ubuntu 18.04.2 LTS

How to fix it?
Thnx

[maitredede]

Hi,
I have the same behavior.
It is related to library https://github.com/gotk3/gotk3 that does not know how to translate a type into a Go struct. There are marshallers for many widgets, but the missing one in our case is related to library https://github.com/sourcegraph/go-webkit2 that did not register marshallers for its types.
I extended gotk3 to have the missing type name...

[sdobz]

@maitredede could you share your fork? I'm running into the same issue