[GHC] #14402: Compiler hangs - UdecidableInstances

[GHC]

#14402: Compiler hangs - UdecidableInstances
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        Reporter:  lehins            |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.2.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by mpickering):

 Perhaps a duplicate of #13943


 Which is fixed by
 https://phabricator.haskell.org/rGHCa8fde1831f4b99885b8ed444f9cd7dffd9252150

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14402#comment:2>
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