[GHC] #11283: PatternSynonms and DisambiguateRecordFields causes panic

[GHC]

#11283: PatternSynonms and DisambiguateRecordFields causes panic
-------------------------------------+-------------------------------------
        Reporter:  adamgundry        |                Owner:  adamgundry
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.11
      Resolution:                    |             Keywords:
                                     |  PatternSynonyms
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Compile-time      |            Test Case:
  crash                              |  patsyn/should_compile/T11283
      Blocked By:                    |             Blocking:
 Related Tickets:  #9975             |  Differential Rev(s):  Phab:D1695
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by adamgundry):

 * status:  new => patch
 * testcase:   => patsyn/should_compile/T11283
 * differential:   => Phab:D1695


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11283#comment:1>
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