[GHC] #13071: GHCi 8.0.1 panic with PatternSynonyms

[GHC]

#13071: GHCi 8.0.1 panic with PatternSynonyms
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        Reporter:  taktoa      |                Owner:
            Type:  bug         |               Status:  new
        Priority:  normal      |            Milestone:
       Component:  GHCi        |              Version:  8.0.1
      Resolution:              |             Keywords:  PatternSynonyms
Operating System:  Linux       |         Architecture:  Unknown/Multiple
 Type of failure:  GHCi crash  |            Test Case:
      Blocked By:              |             Blocking:
 Related Tickets:              |  Differential Rev(s):
       Wiki Page:              |
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Comment (by taktoa):

 Looks like this might be a dupe of
 https://ghc.haskell.org/trac/ghc/ticket/12007
 and
 https://ghc.haskell.org/trac/ghc/ticket/12017

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13071#comment:2>
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