[GHC] #14241: Pattern synonyms defined through other pattern synonyms produce `impossible happened` in ghci/runhaskell (was: Pattern synonyms defined through other pattern synonyms produce `impossible happened`)

[GHC]

#14241: Pattern synonyms defined through other pattern synonyms produce `impossible
happened` in ghci/runhaskell
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        Reporter:  Heimdell    |                Owner:  (none)
            Type:  bug         |               Status:  new
        Priority:  normal      |            Milestone:
       Component:  Compiler    |              Version:  8.0.1
      Resolution:              |             Keywords:  PatternSynonyms
Operating System:  Linux       |         Architecture:  x86_64 (amd64)
 Type of failure:  GHCi crash  |            Test Case:
      Blocked By:              |             Blocking:
 Related Tickets:              |  Differential Rev(s):
       Wiki Page:              |
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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14241#comment:1>
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