[GHC] #631: deriving show fails in ghci/ppc

#631: deriving show fails in ghci/ppc
---------------------------------+------------------------------------------
 Reporter:  trentbuck@xxxxxxxxx  |          Owner:         
     Type:  bug                  |         Status:  new    
 Priority:  normal               |      Milestone:         
Component:  GHCi                 |        Version:  6.4.1  
 Severity:  major                |       Keywords:         
       Os:  Linux                |   Architecture:  powerpc
---------------------------------+------------------------------------------
To reproduce this bug, write the following text to bug.hs.

 {{{
 data D = D Char deriving Show
 main = print f
 f = D 'a'
 }}}

 Start ghci, and at the prompt enter
 `:load bug.hs`, then `f`.  Instead of printing `D 'a'`, GHCi will
 segfault.

  * This bug DOES manifest on PowerPC (running Debian/sid).
  * This bug DOES NOT manifest on i386 (running Debian/sid).
  * This bug DOES manifest when bug.hs is loaded in ghci.
  * This bug DOES NOT manifest when bug.hs is compiled with ghc.

-- 
Ticket URL: <http://cvs.haskell.org/trac/ghc/ticket/631>
GHC <http://www.haskell.org/ghc/>
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