[GHC] #9339: last is not a good consumer

[GHC]

#9339: last is not a good consumer
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              Reporter:  dfeuer      |             Owner:
                  Type:  bug         |            Status:  patch
              Priority:  normal      |         Milestone:
             Component:              |           Version:  7.8.3
  libraries/base                     |          Keywords:
            Resolution:              |  Operating System:  Unknown/Multiple
Differential Revisions:  Phab:D86    |   Type of failure:  Runtime
          Architecture:              |  performance bug
  Unknown/Multiple                   |         Test Case:
            Difficulty:  Unknown     |          Blocking:
            Blocked By:              |
       Related Tickets:              |
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Comment (by Joachim Breitner <mail@…>):

 In [changeset:"b709f0a047dc036de15dc43d3b0ab88d3e32c5e6/ghc"]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="b709f0a047dc036de15dc43d3b0ab88d3e32c5e6"
 Make last a good consumer

 Summary:
 Make last a good consumer simply by implementing it as foldl. This fixes
 Trac: #9339.
 Thanks to David Feuer for bringing it up.

 Test Plan: perf/should_run/T9339 + general validation

 Reviewers: austin

 Reviewed By: austin

 Subscribers: phaskell, simonmar, relrod, carter

 Differential Revision: https://phabricator.haskell.org/D86

 Trac Issues: #9339
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9339#comment:10>
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