[GHC] #16207: GHC 8.6.3 hangs building wreq-0.5.3.1 on Windows

[GHC]

#16207: GHC 8.6.3 hangs building wreq-0.5.3.1 on Windows
-------------------------------------+-------------------------------------
           Reporter:  cromachina     |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  8.6.3
           Keywords:                 |  Operating System:  Windows
       Architecture:  x86_64         |   Type of failure:  Compile-time
  (amd64)                            |  crash or panic
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 `cabal new-install wreq-0.5.3.1 -j1`

 Observe ghc.exe seemingly stuck in an infinite loop after the following
 line with no allocating or IO occurring:

 `[ 5 of 15] Compiling Network.Wreq.Internal.Lens (
 Network\Wreq\Internal\Lens.hs, dist\build\Network\Wreq\Internal\Lens.o )`

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16207>
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