[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:  closed          
  Priority:  normal              |      Milestone:                  
 Component:  Compiler            |        Version:  7.4.2           
Resolution:  duplicate           |       Keywords:                  
        Os:  Windows             |   Architecture:  Unknown/Multiple
   Failure:  Compile-time crash  |     Difficulty:  Unknown         
  Testcase:                      |      Blockedby:                  
  Blocking:                      |        Related:                  
---------------------------------+------------------------------------------
Changes (by simonpj):

  * status:  new => closed
  * difficulty:  => Unknown
  * resolution:  => duplicate


Comment:

 Thanks.  This is another example of GHC most oft-reported bug (fixed some
 time ago), #5961, #7549, #7516, #7455, #7252, #7236, etc!   The culprit is
 the lower-case `show` in the `deriving` clause for `Token`. It's not
 Alex's fault, happily.

 Simon

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7581#comment:1>
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