[GHC] #11612: Bug in ApplicativeDo

[GHC]

#11612: Bug in ApplicativeDo
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        Reporter:  simonmar          |                Owner:
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:  8.0.1
       Component:  Compiler          |              Version:  8.0.1-rc2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Simon Marlow <marlowsd@…>):

 In [changeset:"3259bf658662e7052ae91de2fa27baae8c84b7fa/ghc" 3259bf6/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="3259bf658662e7052ae91de2fa27baae8c84b7fa"
 Fix a bug in ApplicativeDo (#11612)

 In some cases ApplicativeDo would miss some opportunities, due to a
 wrong calculation of free variables in RnExpr.segments.
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11612#comment:2>
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