null passed to makeNewGObject in handler for setFocusChild

[guest]

The following code crashes with

Crash: user error (makeNewGObject: object is NULL)

This happens with gtk-0.11.0 and the latest code from the darcs repository. There is a similar error with Window.onSetFocus/afterSetFocus.

import Graphics.UI.Gtk as Gtk

main = do

initGUI window <- windowNew nb <- notebookNew entry1 <- entryNew entry2 <- entryNew

set nb [ containerChild := entry1,

containerChild := entry2 ]

set window [ containerBorderWidth := 8,

windowTitle := "Crash Me", containerChild := nb ]

-- apparently the widget in this signal can be null on nb setFocusChild $ \w -> widgetGetName w >>= putStrLn >> return ()

widgetGrabFocus entry1 notebookNextPage nb -- CRASH!

widgetShowAll window mainGUI

[guest]

Test new patch

[guest]

patch

[guest]

I've attached a patch and a test.

- Dusty DeWeese?

[axel]

Patch applied, thanks!

This will break the API but I'm hesitant to keep a buggy function.