[GHC] #15736: Testsuite failures from validate --slow

[GHC]

#15736: Testsuite failures from validate --slow
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        Reporter:  jrp               |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:
       Component:  Test Suite        |              Version:  8.6.1
      Resolution:                    |             Keywords:
Operating System:  Linux             |         Architecture:  x86_64
                                     |  (amd64)
 Type of failure:  Incorrect result  |            Test Case:
  at runtime                         |  EtaExpandLevPoly T14936 T15349
                                     |  T2783 T4334 T7919 haddock.Cabal
                                     |  haddock.base haddock.compiler
                                     |  hpc_fork plugin-recomp-change
                                     |  plugin-recomp-change-prof recomp007
                                     |  space_leak_001
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by jrp):

 ...and ```validate --slow``` still fails to run as above.  So whatever
 ```--slow``` adds to the mix is incorrectly configured.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15736#comment:18>
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