[GHC] #16386: T16219 fails on Windows

[GHC]

#16386: T16219 fails on Windows
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           Reporter:  bgamari           |             Owner:  (none)
               Type:  bug               |            Status:  new
           Priority:  normal            |         Milestone:  8.10.1
          Component:  Compiler          |           Version:  8.4.3
           Keywords:                    |  Operating System:  Windows
       Architecture:  Unknown/Multiple  |   Type of failure:  None/Unknown
          Test Case:                    |        Blocked By:
           Blocking:                    |   Related Tickets:
Differential Rev(s):                    |         Wiki Page:
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 {{{
 =====> T16219(normal) 85 of 6839 [0, 0, 0]
 cd "backpack/cabal/T16219/T16219.run" && $MAKE -s --no-print-directory
 T16219 CLEANUP=1
 Wrong exit code for T16219()(expected 0 , actual 2 )
 Stderr ( T16219 ):
 C:\GitLabRunner\builds\8fc0e283\0\ghc\ghc\inplace\lib\../mingw/bin\ar.exe:
 dist\build\backpack-
 issue-0.1.0.0-60IHJZyC3G628wj7263Sr0-library-a+Dil0EMVFuE1Kv7vqZWLGcN\objs-3388
 \libHSbackpack-
 issue-0.1.0.0-60IHJZyC3G628wj7263Sr0-library-a+Dil0EMVFuE1Kv7vqZWLGcN.a:
 No such file or directory
 make[2]: *** [Makefile:12: T16219] Error 1
 *** unexpected failure for T16219(normal)
 =====> bkpcabal03(normal) 88 of 6839 [0, 1, 0]
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16386>
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