Re: [GHC] #5513: panic! (the 'impossible' happened) on ‘deriving instance lowercase_name a’

[GHC]

#5513: panic! (the 'impossible' happened) on ‘deriving instance lowercase_name a’
---------------------------------+------------------------------------------
    Reporter:  andersk           |       Owner:                    
        Type:  bug               |      Status:  new               
    Priority:  normal            |   Component:  Compiler          
     Version:  7.3               |    Keywords:                    
    Testcase:                    |   Blockedby:                    
          Os:  Unknown/Multiple  |    Blocking:                    
Architecture:  Unknown/Multiple  |     Failure:  Compile-time crash
---------------------------------+------------------------------------------

Comment(by simonpj@…):

 commit ce1f1cd5f0ec5f07475e44cf2b7f72e0cbb8a963
 {{{
 Author: Simon Peyton Jones <simonpj at microsoft.com>
 Date:   Thu Sep 29 16:47:57 2011 +0100

     Tidy up the shape-checking for instance types
     (in instance and standalone deriving decls)

     Fixes Trac #5513.

  compiler/parser/Parser.y.pp  |    7 +++----
  compiler/parser/RdrHsSyn.lhs |   21 ---------------------
  compiler/rename/RnNames.lhs  |   10 +++++++---
  compiler/rename/RnSource.lhs |    4 ++--
  compiler/rename/RnTypes.lhs  |   17 ++++++++++++++++-
  5 files changed, 28 insertions(+), 31 deletions(-)
 }}}

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5513#comment:1>
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