[GHC] #13132: Compilation fails with a panic: get_op runContT

[GHC]

#13132: Compilation fails with a panic: get_op runContT
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        Reporter:  PoroCYon          |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by RyanGlScott):

 Here's a minimal test case:

 {{{#!hs
 module Bug where

 newtype ContT r m a = ContT { runContT :: (a -> m r) -> m r }

 foo = (`runContT` bar.baz)
 }}}

 {{{
 $ ghc Bug.hs
 [1 of 1] Compiling Bug              ( Bug.hs, Bug.o )
 ghc: panic! (the 'impossible' happened)
   (GHC version 8.0.2 for x86_64-unknown-linux):
         get_op runContT
 }}}

 Also reproducible on GHC HEAD.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13132#comment:3>
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