[GHC] #8147: Exponential behavior in instance resolution on fixpoint-of-sum

[GHC]

#8147: Exponential behavior in instance resolution on fixpoint-of-sum
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        Reporter:  jkoppel           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.6.3
      Resolution:                    |             Keywords:  performance,
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by dfeuer):

 The original files no longer work with GHC 8.2.1 as a result of TH
 changes. I've uploaded new ones that do. Unfortunately, the bug is still
 with us.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8147#comment:1>
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