[GHC] #14498: GHC internal error: "not in scope during TC but it passed the renamer"

[GHC]

#14498: GHC internal error: "not in scope during TC but it passed the renamer"
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        Reporter:  Iceland_jack      |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  8.2.1
  checker)                           |             Keywords:
      Resolution:                    |  PatternSynonyms
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #14288            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by RyanGlScott):

 Replying to [comment:10 simonpj]:
 > And I am increasingly dubious about comment:1 and comment:2, which
 suggest that `kk` should be in scope in the pattern.  I can't make sense
 of that.

 I'm not sure how you came to that conclusion. I'm suggesting the
 opposite—`kk` (from the type signature) should //not// be brought into
 scope over the body of `SS`!

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14498#comment:11>
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