[GHC] #16074: Hopelessly confusing error involving runtime-reps

[GHC]

#16074: Hopelessly confusing error involving runtime-reps
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        Reporter:  simonpj           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.6.3
      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 Simon Peyton Jones <simonpj@…>):

 In [changeset:"5f2a8793514918eaa670347ce0d95dfdbbdd4f4d/ghc"
 5f2a8793/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="5f2a8793514918eaa670347ce0d95dfdbbdd4f4d"
 Refine the suppression of RuntimeRep variables

 When we pretty-print types, we suppress RuntimeRep variables, but
 we were being too aggressive in doing so, resulting in Trac #16074.

 This patch makes the suppression a bit less aggressive.
 See Note [Defaulting RuntimeRep variables]
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16074#comment:3>
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