[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:                    |  (reverted), Phab:D5165, Phab:D5178
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Comment (by Ömer Sinan Ağacan <omeragacan@…>):

 In [changeset:"d90946cea1357d3e99805c27dab1e811785a4088/ghc" d90946c/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="d90946cea1357d3e99805c27dab1e811785a4088"
 Fix a MSG_BLACKHOLE sanity check, add some comments

 Reviewers: simonmar, bgamari, erikd

 Reviewed By: simonmar

 Subscribers: rwbarton, carter

 GHC Trac Issues: #15508

 Differential Revision: https://phabricator.haskell.org/D5178
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15508#comment:21>
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