[GHC] #15201: GHC 8.4 fails to build on Debian s390x

[GHC]

#15201: GHC 8.4 fails to build on Debian s390x
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        Reporter:  clint             |                Owner:  (none)
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.4.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:  Other
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by clint):

 (same symptoms on mips/mipsel/mips64el) / #15204

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15201#comment:3>
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