[GHC] #13429: Optimizer produces Core with an infinite <<loop>>

[GHC]

#13429: Optimizer produces Core with an infinite <<loop>>
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        Reporter:  lehins            |                Owner:  simonpj
            Type:  bug               |               Status:  merge
        Priority:  highest           |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.0.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Runtime crash     |            Test Case:
                                     |  simplCore/should_run/T13429,
                                     |  T13429_2
      Blocked By:                    |             Blocking:
 Related Tickets:  #13750            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by nh2):

 I've backported the above fix to GHC 8.0.2 and created bindist for Linux:

 https://github.com/nh2/ghc/releases/tag/ghc-8.0.2-bugfix-12545-backport-2017-06-08

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13429#comment:27>
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