[GHC] #12007: Panic when loading file with nested pattern synonyms into ghci

[GHC]

#12007: Panic when loading file with nested pattern synonyms into ghci
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        Reporter:  MikeIzbicki       |                Owner:
            Type:  bug               |               Status:  merge
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.1
      Resolution:                    |             Keywords:
                                     |  PatternSynonyms
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
                                     |  ghci/scripts/T12007
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by bgamari):

 Merged to `ghc-8.0` as 726d1ddba45d24c998ae378ed5e688a2d24665e7.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12007#comment:14>
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