#7438: Tc panic when type declaration is missing
Reporter:  heisenbug         |          Owner:                  
    Type:  bug               |         Status:  new             
Priority:  normal            |      Component:  Compiler        
 Version:  7.7               |       Keywords:                  
      Os:  Unknown/Multiple  |   Architecture:  Unknown/Multiple
 Failure:  GHCi crash        |      Blockedby:                  
Blocking:                    |        Related:                  

Comment(by heisenbug):

 I should add that the above is happening in GHCi. With GHC proper I get:

 > ghc: panic! (the 'impossible' happened)
 >   (GHC version 7.7.20121114 for x86_64-unknown-linux):
 >         tcTyVarDetails k{tv ajW} [tv]

 So a bit more information getting through.

Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7438#comment:1>
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