[GHC] #9368: Add strictly accumulating scanl' to Data.List

[GHC]

#9368: Add strictly accumulating scanl' to Data.List
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              Reporter:  dfeuer      |            Owner:
                  Type:  feature     |           Status:  new
  request                            |        Milestone:
              Priority:  normal      |          Version:  7.8.3
             Component:              |         Keywords:
  libraries/base                     |     Architecture:  Unknown/Multiple
            Resolution:              |       Difficulty:  Easy (less than 1
      Operating System:              |  hour)
  Unknown/Multiple                   |       Blocked By:
       Type of failure:              |  Related Tickets:  #9345
  None/Unknown                       |
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Comment (by dfeuer):

 Based on the structure of the code, I think we probably want a rewrite
 rule for `tail $ scanl' ...` to avoid adding the first element instead of
 trying to take it off later, which doesn't work so well.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9368#comment:2>
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