Status: New Owner: ---- New issue 507 by smp...@gmail.com: Pattern match failure in do expression at XMonad/Prompt.hs:601:3-14 http://code.google.com/p/xmonad/issues/detail?id=507 **What steps will reproduce the problem?** I'm not sure that I can exactly describe how I get it. Generally speaking, it's `shellPrompt' call and fast `t' pressing. Than I get xmonad totally freezed and message in terminal where I call `xinit', which run xmonad: Pattern match failure in do expression at XMonad/Prompt.hs:601:3-14 At 601 line of Prompt.hs there is unsafe pattern matching: Just bgcolor <- io $ initColor d (bgColor c) Just border <- io $ initColor d (borderColor c) **What is the expected output? What do you see instead?** What I want is some `fromJust' there or hadling this situation with `case'. It's xmonad-contrib-0.10-r1 build from gentoo-haskell overlay. (https://github.com/gentoo-haskell/gentoo-haskell/tree/master/x11-wm/xmonad-c...)