[GHC] #15508: concprog001 fails with various errors

[GHC]

#15508: concprog001 fails with various errors
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        Reporter:  osa1              |                Owner:  osa1
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:  8.6.1
       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
       Wiki Page:                    |
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Comment (by osa1):

 That's right. In my testing this program does not fail if I don't use
 debug or prof runtimes.

 I think the debug runtime issue is #15571. I don't know if there are other
 problems though.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15508#comment:15>
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