[GHC] #11356: GHC panic

[GHC]

#11356: GHC panic
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        Reporter:  Iceland_jack      |                Owner:
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:  8.0.1
       Component:  Compiler (Type    |              Version:  8.1
  checker)                           |
      Resolution:  fixed             |             Keywords:  TypeInType
Operating System:  Linux             |         Architecture:  x86
 Type of failure:  Compile-time      |            Test Case:
  crash                              |  typecheck/should_fail/T11356
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by goldfire):

 Great -- thanks. I had been wanting to do a similar refactoring now that
 we have `TcTyCon`. I actually think there's even more we can do here,
 reducing the knot to including only the final zonk. Zonking a tycon would
 just look up the loopy tycon. But no more knot-tied tycons during
 typechecking and no more `mkNakedXXX` functions.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11356#comment:7>
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