#2267: Bogus "unused import" warning
-------------------------+--------------------------------------------------
Reporter: simonpj | Owner:
Type: bug | Status: new
Priority: normal | Milestone: 6.10 branch
Component: Compiler | Version: 6.8.2
Severity: normal | Keywords:
Difficulty: Unknown | Testcase:
Architecture: Unknown | Os: Unknown
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In `DsMeta` (in the source code for GHC itself), there's an import
{{{
import qualified OccName
}}}
With `-fwarn-unused-imports` we get the warning
{{{
deSugar/DsMeta.hs:45:0:
Warning: Module `OccName' is imported, but nothing from it is used,
except perhaps instances visible in `OccName'
To suppress this warning, use: import OccName()
}}}
But that's wrong: there are several uses of things imported from
`OccName`.
I tried to reproduce this in a much smaller program, and failed, so
something not entirely trivial is happening. Hence this ticket, to make
sure we don't forget.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2267>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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