[GHC] #15897: Negative MUT time in +RTS -s -RTS when heap profiling is enabled

[GHC]

#15897: Negative MUT time in +RTS -s -RTS when heap profiling is enabled
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        Reporter:  maoe              |                Owner:  (none)
            Type:  bug               |               Status:  merge
        Priority:  normal            |            Milestone:  8.8.1
       Component:  Profiling         |              Version:  8.6.2
      Resolution:                    |             Keywords:
Operating System:  Linux             |         Architecture:  x86_64
 Type of failure:  Debugging         |  (amd64)
  information is incorrect           |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by sgraf):

 There was a (probably) spurious failure of this in
 https://gitlab.haskell.org/ghc/ghc/-/jobs/20475. Let's see if this happens
 again (https://gitlab.haskell.org/ghc/ghc/-/jobs/20799).

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15897#comment:11>
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