[GHC] #10527: Panic Simplifier ticks exhausted with type families

[GHC]

#10527: Panic Simplifier ticks exhausted with type families
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        Reporter:  sopvop            |                   Owner:  bgamari
            Type:  bug               |                  Status:  new
        Priority:  highest           |               Milestone:  7.10.2
       Component:  Compiler          |                 Version:  7.10.1-rc1
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:
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Comment (by bgamari):

 One obvious qualitative difference between the two simplifier trajectories
 is that the 7.10.2 stops emits its last `SimplBind` trace (for
 `$s$crsubset_s2gQ`) somewhere around 13% through the log (measured in
 lines). In contrast, 7.10.1 emits `SimplBinds` every regularly (at most
 every few hundred lines) throughout the log. I suppose this means that
 7.10.2 is spending most of its time playing with this one top-level
 binding?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10527#comment:10>
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