[GHC] #12950: Unnecessarily complicated left-hand side for SPECIALIZE pragma causing RULE left-hand side too complicated to desugar

[GHC]

#12950: Unnecessarily complicated left-hand side for SPECIALIZE pragma causing RULE
left-hand side too complicated to desugar
-------------------------------------+-------------------------------------
        Reporter:  nfrisby           |                Owner:
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  7.10.2
  checker)                           |
      Resolution:  worksforme        |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Incorrect         |            Test Case:
  error/warning at compile-time      |  deSugar/should_compile/T12950
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
  #10555,#12074,#12649               |
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by simonpj):

 * testcase:   => deSugar/should_compile/T12950


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12950#comment:6>
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