Serge D. Mechveliani wrote:
People,
here is a more precise report about empty _export_ in
ghc-6.8.1-candidate:
I use
--------------------------------
module M1 (f, module M2)
where
import M2 ()
f = ...
--------------------------------
in the situation when M1 imports some instances from M2 and
reexports these instances.
And ghc-6.8.1-candidate reports
"Warning: The export item `module M2' exports nothing"
1) Can I fix anything here?
2) Should this warning be different?
The warning is true. The instances will be exported even if `module M2'
is omitted from the export list, so that export item exports nothing.
Isaac
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