[GHC] #14116: Core lint error while compiling master

[GHC]

#14116: Core lint error while compiling master
-------------------------------------+-------------------------------------
        Reporter:  bgamari           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:
       Component:  Compiler          |              Version:  8.2.1
      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:                    |
-------------------------------------+-------------------------------------

Comment (by bgamari):

 Here is a relevant excerpt from the core program,
 {{{#!hs
   defaultScheme4_r2S1 :: String
   [GblId] =
       \u []
           src<compiler/utils/PprColour.hs:(62,1)-(70,3)>
           src<compiler/utils/PprColour.hs:12:3-67>
           src<compiler/utils/PprColour.hs:12:65-66>
           src<compiler/utils/PprColour.hs:69:34-42>
           src<compiler/utils/PprColour.hs:12:52-53>
           src<compiler/utils/PprColour.hs:69:16-22>
           mappend $fMonoid[] colBold colBlueFg;

   defaultScheme :: Scheme
   [GblId, Unf=OtherCon []] =
       NO_CCS Scheme! [$cmempty_r2Rw
                       colBold
                       defaultScheme1_r2RY
                       defaultScheme2_r2RZ
                       defaultScheme3_r2S0
                       defaultScheme4_r2S1];
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14116#comment:1>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler