[GHC] #15853: Unregisterised GHC panics when building test cgrun018

[GHC]

#15853: Unregisterised GHC panics when building test cgrun018
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        Reporter:  iliastsi          |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:
       Component:  Compiler          |              Version:  8.4.3
  (CodeGen)                          |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash or panic                     |            Test Case:  cgrun018
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by jrtc27):

 This is fixed by https://phabricator.haskell.org/D5306

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15853#comment:1>
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