[GHC] #2267: Bogus "unused import" warning

[GHC]

#2267: Bogus "unused import" warning
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    Reporter:  simonpj           |        Owner:                  
        Type:  bug               |       Status:  new             
    Priority:  high              |    Milestone:  6.10 branch     
   Component:  Compiler          |      Version:  6.10.1          
    Severity:  normal            |   Resolution:                  
    Keywords:                    |   Difficulty:  Unknown         
    Testcase:                    |           Os:  Unknown/Multiple
Architecture:  Unknown/Multiple  |  
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Comment (by seliopou):

 The problem is that the {{{GlobalRdrElt}}} for {{{B.ByteString}}} has two
 {{{ImportSpec}}}s for its {{{Provenance}}}, only the first of which (the
 "wrong" one, i.e., {{{Data.ByteString.UTF8}}}) is being added to
 {{{minimal_imports1}}}, which is then used to construct
 {{{unused_imp_mods}}} in {{{reportUnusedNames}}}
 (rename/RnNames.lhs:1084).

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2267#comment:8>
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