[xmonad] XMonad.Prompt.Shell crashes X11 to console

[Don Stewart]

ac007:
> Hello,
> 
> I updated xmonad-0.6(darcs) yesterday and since then XMonad.Pompt.Shell
> crashes xmonad to console. Steps to reproduce :
> 1) Spawn Shell prompt
> 2) type anything (doesnt have to be a valid command)
> 3) Press <CR>
> 4) X11 crashes to console with following message :
>   xmonad-i386-linux: internal error: PAP object entered!
>        (GHC version 6.8.2 for i386_unknown_linux)
>         Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
> 
> My full xmonad.hs config (http://pastebin.com/m6804d9e1) and xinitrc
> (http://pastebin.com/m42de0648) if needed. Don't know what other
> relevant info to give, so don't hesitate to ask. 
> 
> In the mean time, back to dmenu.
> 
> Bests and long live XMonad :)
> Alexandre

That looks like a bug related to having miscompiled the X11 library (or
xmonad). Do a full make clean, then rebuild, then try again.

If it persists, its a runtime bug in GHC.

-- Don