[GHC] #11198: TypeInType error message regressions

[GHC]

#11198: TypeInType error message regressions
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        Reporter:  goldfire          |                Owner:  goldfire
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:  8.2.1
       Component:  Compiler (Type    |              Version:  7.11
  checker)                           |             Keywords:  TypeInType,
      Resolution:                    |  ErrorMessages
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #11672            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonpj):

 See #13530 for a concrete and very simple test case

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11198#comment:10>
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