[GHC] #16017: ghc-8.6.1 and ghc-8.6.2 use a log of memory

[GHC]

#16017: ghc-8.6.1 and ghc-8.6.2 use a log of memory
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        Reporter:  newhoggy          |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.6.3
       Component:  Compiler          |              Version:  8.6.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         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 newhoggy):

 For my own purposes, breaking up the module into two smaller modules was
 sufficient to avoid triggering the problem, but it would be good if the
 memory usage could be reduced for this case.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16017#comment:1>
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