Warn when supplying version number to package-qualified import
$ ghci -XPackageImports GHCi, version 7.8.3: ... Prelude> import "transformers-0.3.0.0" Control.Monad.Trans.List <no location info>: Could not find module ‘Control.Monad.Trans.List’ It is not a module in the current program, or in any known package. Prelude> import "transformers" Control.Monad.Trans.List Prelude Control.Monad.Trans.List>
The import with explicit package name works, if I omit the package version. I think GHC should at least warn that providing a version does not work.
See also #2362 (closed).