[GHC] #11821: Internal error: not in scope during type checking, but it passed the renamer

[GHC]

#11821: Internal error: not in scope during type checking, but it passed the
renamer
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        Reporter:  darchon           |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.0.2
       Component:  Compiler          |              Version:  8.0.1-rc3
      Resolution:                    |             Keywords:  TypeInType
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  GHC rejects       |  Unknown/Multiple
  valid program                      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by goldfire):

 Indeed. And now I've fixed this bug, made dead simple by getting
 `splitTelescopeTvs` out of the way. You can see the fix on branch `wip/no-
 telescope-tvs`, but there's a small validation issue still outstanding.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11821#comment:6>
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