[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:
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 simonpj):

 Richard I wonder if you might look at this?  The dreaded
 `splitTelescopeTvs` seems to be implicated, and I really don't understand
 that function.

 I bet it's not hard to fix.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11821#comment:2>
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