[GHC] #14796: Pretty-printer bug

[GHC]

#14796: Pretty-printer bug
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        Reporter:  Iceland_jack      |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.5
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Iceland_jack):

 Ryan had trouble reproducing it so here it is for 8.2.1

 {{{
 $ ghci-8.2.1 -ignore-dot-ghci
 GHCi, version 8.2.1: http://www.haskell.org/ghc/  :? for help
 Prelude> :set -XGADTs -XConstraintKinds -XTypeApplications
 Prelude> data ECC ctx f a where ECC :: ctx => f a -> ECC ctx f a
 Prelude> :t ECC @() @[] @()
 ECC @() @[] @() :: [()] -> ECC () :: Constraint [] ()
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14796#comment:2>
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