[GHC] #13320: Unfortunate compiler loop when creating type loop (with UndecidableInstances)

[GHC]

#13320: Unfortunate compiler loop when creating type loop (with
UndecidableInstances)
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        Reporter:  Ptival            |                Owner:  dfeuer
            Type:  bug               |               Status:  closed
        Priority:  low               |            Milestone:  8.2.1
       Component:  Compiler (Type    |              Version:  8.0.1
  checker)                           |             Keywords:
      Resolution:  fixed             |  UndecidableInstances loop
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):  phab:D3532
       Wiki Page:                    |
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Comment (by bgamari):

 Test merged with 561553fe424e2f2e3500b635655fe6d9c294c666.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13320#comment:8>
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