patch applied (ghc): Fix a bug in CorePrep that meant output invariants not satisfied

[Simon Peyton Jones]

Mon May 31 08:00:13 PDT 2010  simonpj at microsoft.com
  * Fix a bug in CorePrep that meant output invariants not satisfied
  
  In cpePair I did things in the wrong order so that something that
  should have been a CprRhs wasn't.  Result: a crash in CoreToStg.
  Fix is easy, and I added more informative type signatures too.

    M ./compiler/coreSyn/CorePrep.lhs -20 +17

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=ghc;a=darcs_commitdiff;h=20100531150013-1287e-94ca45f60285bded602165ce6515bdd3af8650c4.gz