[GHC] #1074: -fwarn-unused-imports complains about wrong import

[GHC]

#1074: -fwarn-unused-imports complains about wrong import
-------------------------+--------------------------------------------------
    Reporter:  guest     |       Owner:         
        Type:  bug       |      Status:  new    
    Priority:  normal    |   Milestone:         
   Component:  Compiler  |     Version:  6.6    
    Severity:  normal    |    Keywords:         
  Difficulty:  Unknown   |    Testcase:         
Architecture:  powerpc   |          Os:  MacOS X
-------------------------+--------------------------------------------------
If a symbol is accessible through multiple imports, ghc seems to complain
 about the first one, even if that's the one it's actually accessed
 through.

 {{{
 $ cat Test.hs
 module Test where

 import qualified Control.Monad (ap)
 import qualified Control.Monad.Reader

 foo :: IO ()
 foo = return id `Control.Monad.ap` return ()

 $ ghc --version
 The Glorious Glasgow Haskell Compilation System, version 6.6

 $ ghc -c Test.hs -Werror -fwarn-unused-imports

 Test.hs:3:0:
     Warning: Module `Control.Monad' is imported, but nothing from it is
 used,
                except perhaps instances visible in `Control.Monad'
              To suppress this warning, use: import Control.Monad()

 $
 }}}

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1074>
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