[GHC] #4983: Warning about redundant import is wrong when hiding identifiers in order to avoid export ambiguities

[GHC]

#4983: Warning about redundant import is wrong when hiding identifiers in order to
avoid export ambiguities
------------------------------------------------+---------------------------
  Reporter:  Lemming                            |          Owner:                  
      Type:  bug                                |         Status:  closed          
  Priority:  normal                             |      Milestone:                  
 Component:  Compiler                           |        Version:  7.0.1           
Resolution:  wontfix                            |       Keywords:                  
  Testcase:                                     |      Blockedby:                  
Difficulty:                                     |             Os:  Unknown/Multiple
  Blocking:                                     |   Architecture:  Unknown/Multiple
   Failure:  Incorrect warning at compile-time  |  
------------------------------------------------+---------------------------
Changes (by igloo):

  * status:  new => closed
  * resolution:  => wontfix


Comment:

 I think the warning is OK in this case: You've explicitly imported the
 `Prelude` and then used nothing from it. You need to do
 {{{
 import Prelude ()
 }}}
 if you want to explicitly import it (which you need to do to avoid the
 name collision), but import nothing from it.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4983#comment:1>
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