[GHC] #1729: panic on type family

[GHC]

#1729: panic on type family
--------------------------------------+-------------------------------------
  Reporter:  jpbernardy               |          Owner:       
      Type:  bug                      |         Status:  new  
  Priority:  normal                   |      Milestone:       
 Component:  Compiler (Type checker)  |        Version:  6.8  
  Severity:  major                    |       Keywords:       
Difficulty:  Unknown                  |             Os:  Linux
  Testcase:                           |   Architecture:  x86  
--------------------------------------+-------------------------------------
Ghc panics on this module:

 {-# LANGUAGE TypeFamilies #-}

 type family Element c :: *

 f :: Element x
 f = undefined

 ------
 ghc-6.8.0.20070921: panic! (the 'impossible' happened)
   (GHC version 6.8.0.20070921 for i386-unknown-linux):
         check_tau_type main:Main.Element{tc r5C} x{tv a5F} [tv]

 Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1729>
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