[GHC] #5971: Referencing a newName in a VarE without definition triggers "the impossible happened"

[GHC]

#5971: Referencing a newName in a VarE without definition triggers "the impossible
happened"
---------------------------------+------------------------------------------
  Reporter:  josh                |          Owner:                  
      Type:  bug                 |         Status:  closed          
  Priority:  normal              |      Milestone:                  
 Component:  Compiler            |        Version:  7.4.1           
Resolution:  fixed               |       Keywords:                  
        Os:  Unknown/Multiple    |   Architecture:  Unknown/Multiple
   Failure:  Compile-time crash  |     Difficulty:  Unknown         
  Testcase:  th/T5971            |      Blockedby:                  
  Blocking:                      |        Related:                  
---------------------------------+------------------------------------------
Changes (by simonpj):

  * status:  new => closed
  * difficulty:  => Unknown
  * resolution:  => fixed
  * testcase:  => th/T5971


-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5971#comment:2>
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