Issue 229: WindowGo.runOrRaise does neither with hback program http://code.google.com/p/xmonad/issues/detail?id=229 New issue report by wirtwolff: What steps will reproduce the problem? 1. install hback from hackage, for simplicity copy to /usr/local/bin 2. bind a key to runOrRaise "hback" (className =? "Hback") and use it, with or without hback running** What is the expected output? What do you see instead? Expect WindowGo.runOrRaise "hback" to run hback on current ws if not already running, or switch view to ws it's running on. Instead nothing seems to happen. On next X action 'Prelude.head: empty list' is printed to stderr. What version of the product are you using? On what operating system? xmonad-0.8 xmonad-contrib-0.8-r1 gentoo Please provide any additional information below. twifkak mentioned Prompt.Shell.getCommands is likely source of error, a (the?) relavent call to head. ** ManageHelpers.doCenterFloat on className =? "Hback" and Prompt.runOrRaisePrompt hback both work correctly. If this error is due to a module from XMonadContrib, please tag this issue with 'Component-Contrib' below. Component-Contrib Issue attributes: Status: New Owner: ---- Labels: Type-Defect Priority-Medium -- You received this message because you are listed in the owner or CC fields of this issue, or because you starred this issue. You may adjust your issue notification preferences at: http://code.google.com/hosting/settings