[GHC] #14951: SpecConstr needs two runs when one should suffice

[GHC]

#14951: SpecConstr needs two runs when one should suffice
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        Reporter:  nomeata           |                Owner:  (none)
            Type:  task              |               Status:  patch
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.2.2
      Resolution:                    |             Keywords:  SpecConstr
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #14844            |  Differential Rev(s):  Phab:D4519
       Wiki Page:                    |
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Changes (by nomeata):

 * status:  new => patch
 * differential:   => Phab:D4519


Comment:

 I put the code up for review and discussion at Phab:D4519

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14951#comment:17>
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