[GHC] #5456: the 'impossible' happened : Ix{Int}.index: Index (7168) out of range ((0, 72))

[GHC]

#5456: the 'impossible' happened : Ix{Int}.index: Index (7168) out of range
((0,72))
-------------------------+--------------------------------------------------
    Reporter:  erikd     |        Owner:                     
        Type:  bug       |       Status:  new                
    Priority:  normal    |    Milestone:                     
   Component:  Compiler  |      Version:  7.2.1              
    Keywords:            |     Testcase:                     
   Blockedby:            |   Difficulty:                     
          Os:  Linux     |     Blocking:                     
Architecture:  powerpc   |      Failure:  Building GHC failed
-------------------------+--------------------------------------------------

Comment(by simonpj):

 Wait -- there are two different errors reported here:
  * The Ix{Int} error is almost certainly due to a left-over .hi file after
 a change of interface-file format.  Remove all .hi files and try again.
  * The `tyConFamilySize` thing is probably a real bug -- I am chasing.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5456#comment:4>
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