[GHC] #11830: Disabling idle GC leads to freeze

[GHC]

#11830: Disabling idle GC leads to freeze
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        Reporter:  NeilMitchell      |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Runtime System    |              Version:  8.0.1-rc3
      Resolution:                    |             Keywords:
Operating System:  Linux             |         Architecture:
 Type of failure:  Incorrect result  |  Unknown/Multiple
  at runtime                         |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by NeilMitchell):

 Setting {{{-I1000}}}, when the computation takes < 20s, still succeeds.
 That seems to imply that the idle setting of 0 is the problem. Adding
 {{{-S}}} has the last line not being a GC.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11830#comment:2>
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