[GHC] #7142: ghc: panic! (the 'impossible' happened) when using lowercase eq/show in deriving

[GHC]

#7142: ghc: panic! (the 'impossible' happened) when using lowercase eq/show in
deriving
---------------------------+------------------------------------------------
    Reporter:  mbrodersen  |        Owner:                    
        Type:  bug         |       Status:  closed            
    Priority:  normal      |    Component:  Compiler          
     Version:  7.4.1       |   Resolution:  duplicate         
    Keywords:              |           Os:  Linux             
Architecture:  x86         |      Failure:  Compile-time crash
    Testcase:              |    Blockedby:                    
    Blocking:              |      Related:                    
---------------------------+------------------------------------------------
Changes (by guest):

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


Comment:

 It is fixed in HEAD. See ticket #5961. Now you get

 {{{
 Bb.hs:3:57:
     Illegal deriving item `eq'
     In the data declaration for `Tree'
 }}}

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7142#comment:1>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler