[GHC] #7681: Panic on quoting empty case

[GHC]

#7681: Panic on quoting empty case
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Reporter:  monoidal          |          Owner:                  
    Type:  bug               |         Status:  new             
Priority:  normal            |      Component:  Template Haskell
 Version:  7.7               |       Keywords:                  
      Os:  Unknown/Multiple  |   Architecture:  Unknown/Multiple
 Failure:  None/Unknown      |      Blockedby:                  
Blocking:                    |        Related:                  
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Comment(by eir@…):

 commit 7b098b6009727a012cb1f3ff0ca51698d302cae1
 {{{
 Author: Richard Eisenberg <eir at cis.upenn.edu>
 Date:   Mon Feb 11 23:07:25 2013 -0500

     Fix Trac #7681.

     Removed checks for empty lists for case expressions and lambda-case.
     If -XEmptyCase is not enabled, compilation still fails (appropriately)
     in the renamer.

     Had to remove dead code from TrieMap to pass the validator.

  compiler/coreSyn/TrieMap.lhs |   38
 +-------------------------------------
  compiler/deSugar/DsMeta.hs   |    6 ++++--
  compiler/hsSyn/Convert.lhs   |    8 ++------
  libraries/random             |    2 +-
  4 files changed, 8 insertions(+), 46 deletions(-)
 }}}

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7681#comment:2>
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