[GHC] #7581: ghc crashed on trying compiling a file generated by Alex

[GHC]

#7581: ghc crashed on trying compiling a file generated by Alex
-------------------------------+--------------------------------------------
Reporter:  guest               |          Owner:                  
    Type:  bug                 |         Status:  new             
Priority:  normal              |      Component:  Compiler        
 Version:  7.4.2               |       Keywords:                  
      Os:  Windows             |   Architecture:  Unknown/Multiple
 Failure:  Compile-time crash  |      Blockedby:                  
Blocking:                      |        Related:                  
-------------------------------+--------------------------------------------
 C:\Documents and Settings\bcyrille\My Documents\Hskl>ghc M90.hs
 [1 of 1] Compiling Main             ( M90.hs, M90.o )
 ghc: panic! (the 'impossible' happened)
   (GHC version 7.4.2 for i386-unknown-mingw32):
         nameModule show{tv aqY}

 Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

 Alex version is 3.0.2
 ghc version is 7.4.2
 (haskell platform 2012.4.0.0)

 Can't give much details, first time using Alex... attaching the files

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7581>
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