[GHC] #16218: T16180 is broken on Darwin

[GHC]

#16218: T16180 is broken on Darwin
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        Reporter:  bgamari       |                Owner:  (none)
            Type:  bug           |               Status:  new
        Priority:  highest       |            Milestone:  8.8.1
       Component:  Compiler      |              Version:  8.6.3
      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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Changes (by bgamari):

 * cc: hsyl20 (added)


Comment:

 Henry, do you think you could have a look at this? Sadly the CPP you added
 didn't quite fix the issue (see
 https://gitlab.haskell.org/ghc/ghc/-/jobs/15667).

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16218#comment:1>
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