[GHC] #9927: Should simplifier try more iterations?

[GHC]

#9927: Should simplifier try more iterations?
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        Reporter:  goldfire          |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Build System      |                 Version:  7.11
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
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Comment (by goldfire):

 What is the meaning of the bracketed list in the output? When I posted
 this ticket, I assumed they were the sizes of something... something which
 is getting remarkably small. Upon further reflection, they appear to be
 differences of sizes of something, in which case the simplifier really is
 petering out. But a quick look at the code doesn't answer the question.
 Does anyone know?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9927#comment:4>
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