I am trying to modify xmonad to handle exceptions thrown in getWindowAttributes. Since I am still copy/paste-coding, I need some help. Take a function like this, which I have seen crashes in (especially when using Gimp): floatLocation :: Window -> X (ScreenId, W.RationalRect) floatLocation w = withDisplay $ \d -> do ws <- gets windowset wa <- io $ getWindowAttributes d w let bw = (fromIntegral . wa_border_width) wa sc <- fromMaybe (W.current ws) <$> pointScreen (fi $ wa_x wa) (fi $ wa_y wa) let sr = screenRect . W.screenDetail $ sc rr = W.RationalRect ((fi (wa_x wa) - fi (rect_x sr)) % fi (rect_width sr)) ((fi (wa_y wa) - fi (rect_y sr)) % fi (rect_height sr)) (fi (wa_width wa + bw*2) % fi (rect_width sr)) (fi (wa_height wa + bw*2) % fi (rect_height sr)) return (W.screen sc, rr) where fi x = fromIntegral x I somehow need to wrap the code from getWindowAttributes and on, in something that "does the right thing" if gWA throws an exception. In other places, I have done something like this: sendConfigureEvent :: Display -> XEventPtr -> Window -> Event -> IO () sendConfigureEvent dpy ev w e = C.handle (\(C.SomeException _) -> putStrLn "sendConfigureEvent failed") $ do wa <- io $ getWindowAttributes dpy w setEventType ev configureNotify setConfigureEvent ev w w (wa_x wa) (wa_y wa) (wa_width wa) (wa_height wa) (ev_border_width e) none (wa_override_redirect wa) sendEvent dpy w False 0 ev which works, but in floatLocation the type is X and not IO, and ... well, what's a boy to do? Best regards, Adam -- "It's part of our policy not to be taken seriously" Adam Sjøgren asjo@koldfront.dk