[GHC] #4966: Type checking regression

[GHC]

#4966: Type checking regression
----------------------------------------+-----------------------------------
    Reporter:  igloo                    |        Owner:  simonpj     
        Type:  bug                      |       Status:  new         
    Priority:  highest                  |    Milestone:  7.0.2       
   Component:  Compiler (Type checker)  |      Version:  7.0.1       
    Keywords:                           |     Testcase:              
   Blockedby:                           |   Difficulty:              
          Os:  Unknown/Multiple         |     Blocking:              
Architecture:  Unknown/Multiple         |      Failure:  None/Unknown
----------------------------------------+-----------------------------------

Comment(by igloo):

 This is a cut-down testcase from `uni-htk` 2.2.1.0, incidentally.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4966#comment:1>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler