My daily WTF.

gistfile1.go

func nativecallback_CallAsFunction_go(data_ptr unsafe.Pointer, ctx unsafe.Pointer, obj unsafe.Pointer, thisObject unsafe.Pointer, argumentCount uint, arguments unsafe.Pointer, exception *unsafe.Pointer) unsafe.Pointer {
	defer func() {
		if r := recover(); r != nil {
			*exception = unsafe.Pointer(recover_to_javascript((*Context)(ctx), r))
		}
	}()

	data := (*object_data)(data_ptr)
	ret := data.val.Interface().(GoFunctionCallback)(
		(*Context)(ctx), (*Object)(obj), (*Object)(thisObject), (*[1 << 14]*Value)(arguments)[0:argumentCount])
	return unsafe.Pointer(ret)
}