[GHC] #11569: make -j24 test

[GHC]

#11569: make -j24 test
----------------------------------+--------------------------
           Reporter:  mfox        |             Owner:
               Type:  bug         |            Status:  new
           Priority:  normal      |         Milestone:
          Component:  Test Suite  |           Version:  8.1
           Keywords:              |  Operating System:  Linux
       Architecture:  aarch64     |   Type of failure:  Other
          Test Case:              |        Blocked By:
           Blocking:              |   Related Tickets:
Differential Rev(s):              |         Wiki Page:
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 My computer is slow but has many cores. I find several hundred tests fail
 "bad stderr" when I set the environment variable:

 {{{
     export MAKEFLAGS=-j24
     make test
 }}}

 I'll update with the list of failing tests in a few hours when I'm done
 running the testsuite serially. But one is T3307. It even fails when run
 by itself like:

 {{{
     export MAKEFLAGS=-j24
     make test TESTS="T3307"
 }}}

 But otherwise passes if

 {{{
     unset MAKEFLAGS
     make test TESTS="T3307"
 }}}

  Building version 99cb627a45afacde5f86799671c53baf81daee41

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11569>
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