[GHC] #15508: concprog001 fails with various errors

[GHC]

#15508: concprog001 fails with various errors
-------------------------------------+-------------------------------------
        Reporter:  osa1              |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.6.4
       Component:  Compiler          |              Version:  8.5
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Runtime crash     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #15571            |  Differential Rev(s):  Phab:D5051
                                     |  (reverted), Phab:D5165, Phab:D5178,
       Wiki Page:                    |  MR:103, MR:146
-------------------------------------+-------------------------------------
Changes (by osa1):

 * status:  closed => new
 * owner:  osa1 => (none)
 * resolution:  fixed =>


Comment:

 This is still not closed as
 https://gitlab.haskell.org/ghc/ghc/merge_requests/146 is still not merged.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15508#comment:46>
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