[GHC] #14329: GHC 8.2.1 segfaults while bootstrapping master

[GHC]

#14329: GHC 8.2.1 segfaults while bootstrapping master
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        Reporter:  bgamari           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.2.2
       Component:  Compiler          |              Version:  8.2.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #12960, #9065,    |  Differential Rev(s):  Phab:D4075
  #7762                              |
       Wiki Page:                    |
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Changes (by bgamari):

 * related:  #12960, #9065 => #12960, #9065, #7762


Comment:

 Unfortunately the issue only happens less than one in ten runs even under
 rather strong memory pressure.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14329#comment:6>
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