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

[GHC]

#10527: Panic Simplifier ticks exhausted with type families
-------------------------------------+-------------------------------------
        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:
-------------------------------------+-------------------------------------

Comment (by bgamari):

 Simon has identified that the issue is the simplifier expending a great
 deal of effort simplifying an argument which is ultimately ignored by the
 callee.

 I have merged 07a1f32e8bacecd450112607df3fdf39e553c91e into the `ghc-7.10`
 branch which should resolve this for 7.10.2. Simonpj is working on a more
 thorough fix for `master`. I'll leave this open until the latter fix has
 been merged.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10527#comment:21>
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