Hi all, If you execute the following commands:
$ wget http://ofb.net/~frederik/futility/futility-0.1.0.tar.gz $ tar -xvzf futility-0.1.0.tar.gz $ cd futility-0.1.0/ $ ./do-build conf=1 Then if all goes well you should see an error like this: ./Fu/MonadComp.hs:46:0: Duplicate instance declarations: ./Fu/MonadComp.hs:46:0: instance Monad (Either e) Imported from Control.Monad.Error: instance (Control.Monad.Error.Error e) => Monad (Either e) Then, when you try to build again, after having changed nothing: $ runghc Setup.hs build the build suddenly succeeds! Correct me if I'm wrong, but shouldn't a properly working compiler either fail or succeed on a given package, and not fail one time, and then succeed the next? I mean, this is the whole referential transparency deal right? :) I can reproduce this bug on ghc 6.4 and 6.4.1.20050812 on two i386 computers. Frederik -- http://ofb.net/~frederik/ _______________________________________________ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
