[GHC] #13871: GHC panic in 8.2 only: typeIsTypeable(Coercion)

[GHC]

#13871: GHC panic in 8.2 only: typeIsTypeable(Coercion)
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        Reporter:  RyanGlScott       |                Owner:  bgamari
            Type:  bug               |               Status:  closed
        Priority:  high              |            Milestone:  8.2.1
       Component:  Compiler (Type    |              Version:  8.2.1-rc2
  checker)                           |             Keywords:  TypeInType,
      Resolution:  fixed             |  Typeable
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Compile-time      |            Test Case:
  crash or panic                     |  typecheck/should_compile/T13871
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D3671,
       Wiki Page:                    |  Phab:D3672
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Comment (by goldfire):

 I take it as an eventual goal to have ''all'' types be `Typeable`. Is
 there a ticket requesting support for types with casts/coercions? I don't
 think it would be terribly hard to do.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13871#comment:8>
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