[GHC] #13064: Incorrect redudant imports warning

[GHC]

#13064: Incorrect redudant imports warning
-------------------------------------+-------------------------------------
        Reporter:  phadej            |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  low               |            Milestone:  8.8.1
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Incorrect         |  Unknown/Multiple
  error/warning at compile-time      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #15393            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by mpickering):

 I don't think this patch should be merged if there is any risk of
 destabilising the branch. This has already happened once this release
 cycle with the `MonadFail` desugaring patch being merged very late in the
 day. If this causes any additional warnings then proactive package
 maintainers are going to have to cut a third new release of their package.

 The release is over a month overdue and still have a number of high
 priority bugs to fix #15544 and #15541 in particular.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13064#comment:33>
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