[GHC] #12789: "Simplifier ticks exhausted" compiling mutually recursive modules with GHC 8.

[GHC]

#12789: "Simplifier ticks exhausted" compiling mutually recursive modules with GHC
8.
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        Reporter:  rdwebster     |                Owner:
            Type:  bug           |               Status:  new
        Priority:  normal        |            Milestone:
       Component:  Compiler      |              Version:  8.0.1
      Resolution:                |             Keywords:
Operating System:  MacOS X       |         Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown  |            Test Case:
      Blocked By:                |             Blocking:
 Related Tickets:                |  Differential Rev(s):
       Wiki Page:                |
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Comment (by rdwebster):

 Thanks for investigating.
 I have a workaround for the problem, so I am not blocked by this.
 I decided to restructure the protobuf messages so that there is no longer
 this recursive module import situation.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12789#comment:4>
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