[xmonad] Re: Issue 336 in xmonad: xmonad won't start: Irrefutable pattern failed for pattern (Data.Maybe.Just nbc_)

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Comment #5 on issue 336 by pepeibo... at gmail.com: xmonad won't start:  
Irrefutable pattern failed for pattern (Data.Maybe.Just nbc_)
http://code.google.com/p/xmonad/issues/detail?id=336

I can reproduce this problem on a clean Snow Leopard installation.
Installed GHC 6.10.4, then the Haskell platform and then "cabal install  
xmonad".
This is the output of "cabal install xmonad"

pepe:~/.cabal/packages/hackage.haskell.org/xmonad/0.9/xmonad-0.9$ cabal  
install
Resolving dependencies...
Configuring xmonad-0.9...
Preprocessing library xmonad-0.9...
ld: warning: in  
/Library/Frameworks/GHC.framework/Versions/610/usr/lib/ghc-6.10.4/libgmp.a,  
file is not
of required architecture
Preprocessing executables for xmonad-0.9...
ld: warning: in  
/Library/Frameworks/GHC.framework/Versions/610/usr/lib/ghc-6.10.4/libgmp.a,  
file is not
of required architecture
Building xmonad-0.9...
[1 of 8] Compiling XMonad.StackSet  ( XMonad/StackSet.hs,  
dist/build/XMonad/StackSet.o )
[2 of 8] Compiling XMonad.Core      ( XMonad/Core.hs,  
dist/build/XMonad/Core.o )
[3 of 8] Compiling XMonad.Layout    ( XMonad/Layout.hs,  
dist/build/XMonad/Layout.o )
[4 of 8] Compiling XMonad.Operations ( XMonad/Operations.hs,  
dist/build/XMonad/Operations.o )
[5 of 8] Compiling XMonad.ManageHook ( XMonad/ManageHook.hs,  
dist/build/XMonad/ManageHook.o )
[6 of 8] Compiling XMonad.Config    ( XMonad/Config.hs,  
dist/build/XMonad/Config.o )
[7 of 8] Compiling XMonad.Main      ( dist/build/XMonad/Main.hs,  
dist/build/XMonad/Main.o )
[8 of 8] Compiling XMonad           ( XMonad.hs, dist/build/XMonad.o )
ar: creating archive dist/build/libHSxmonad-0.9.a
[ 1 of 10] Compiling Paths_xmonad     ( dist/build/autogen/Paths_xmonad.hs,  
dist/build/xmonad/xmonad-
tmp/Paths_xmonad.o )
[ 2 of 10] Compiling XMonad.StackSet  ( XMonad/StackSet.hs,  
dist/build/xmonad/xmonad-
tmp/XMonad/StackSet.o )
[ 3 of 10] Compiling XMonad.Core      ( XMonad/Core.hs,  
dist/build/xmonad/xmonad-tmp/XMonad/Core.o )
[ 4 of 10] Compiling XMonad.Layout    ( XMonad/Layout.hs,  
dist/build/xmonad/xmonad-
tmp/XMonad/Layout.o )
[ 5 of 10] Compiling XMonad.Operations ( XMonad/Operations.hs,  
dist/build/xmonad/xmonad-
tmp/XMonad/Operations.o )
[ 6 of 10] Compiling XMonad.ManageHook ( XMonad/ManageHook.hs,  
dist/build/xmonad/xmonad-
tmp/XMonad/ManageHook.o )
[ 7 of 10] Compiling XMonad.Config    ( XMonad/Config.hs,  
dist/build/xmonad/xmonad-
tmp/XMonad/Config.o )
[ 8 of 10] Compiling XMonad.Main      (  
dist/build/xmonad/xmonad-tmp/XMonad/Main.hs,
dist/build/xmonad/xmonad-tmp/XMonad/Main.o )
[ 9 of 10] Compiling XMonad           ( XMonad.hs,  
dist/build/xmonad/xmonad-tmp/XMonad.o )
[10 of 10] Compiling Main             ( Main.hs,  
dist/build/xmonad/xmonad-tmp/Main.o )
Linking dist/build/xmonad/xmonad ...
Preprocessing library xmonad-0.9...
Preprocessing executables for xmonad-0.9...
Running Haddock for xmonad-0.9...
Warning: The documentation for the following packages are not installed. No
links will be generated to these packages: rts-1.0
Warning: XMonad.Core: could not find link destinations for:
     XMonad.Layout.NextNoWrap
Warning: XMonad.Config: could not find link destinations for:
     XMonad.Config.defaultConfig
Documentation created: dist/doc/html/xmonad/index.html
Installing library in /Users/pepe/.cabal/lib/xmonad-0.9/ghc-6.10.4
Installing executable(s) in /Users/pepe/.cabal/bin
Registering xmonad-0.9...
Reading package info from "dist/installed-pkg-config" ... done.
Writing new package config file... done.

Then this is the output of "xmonad"

pepe:~$ xmonad
/Users/pepe/.xmonad/xmonad-i386-darwin: executeFile: does not exist (No  
such file or directory)
xmonad: XMonad/Main.hsc:(82,14)-(84,41): Irrefutable pattern failed for  
pattern (Data.Maybe.Just nbc_)

And then this is the output of "xmonad --recompile"
pepe:~$ xmonad --recompile
xmonad: /Users/pepe/.xmonad/xmonad.errors: openFile: does not exist (No  
such file or directory)


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