[GHC] #11560: panic: isInjectiveTyCon sees a TcTyCon

[GHC]

#11560: panic: isInjectiveTyCon sees a TcTyCon
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        Reporter:  rwbarton          |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  8.1
  checker)                           |
      Resolution:                    |             Keywords:  TypeInType
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash                              |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by RyanGlScott):

 I can't reproduce this with GHC 8.1.20161125:

 {{{
 $ /opt/ghc/head/bin/ghci
 GHCi, version 8.1.20161125: http://www.haskell.org/ghc/  :? for help
 Loaded GHCi configuration from /home/rgscott/.ghci
 λ> :set -XTypeFamilies -XTypeInType
 λ> :m +Data.Kind
 λ> type family T (l :: *) (k :: l) :: * where { T * Int = * }

 <interactive>:3:46: error:
     • Mismatched type name in type family instance.
         Expected: T
           Actual: *
     • In the type family declaration for ‘T’
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11560#comment:5>
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