When using the -ddump-minimal-imports option on a Haskell file, it breaks qualified imports.

Ie, suppose one has a line in a file thus:

 import qualified Data.ByteString as B (putStr, readFile)

Using -ddump-minimal-imports will give you something like this:

 import Data.ByteString(B.putStr, B.readFile)

There are 3 things wrong here:

• putStr and readFile should not be renamed thus, as obviously Data.ByteString has nothing under those names
• Data.ByteString is no longer being imported under a different name, so all function uses relying on B.putStr etc. will break
• Finally, it's just ugly to have no spaces between the last letter of the module's name and the opening parenthesis.

I see this behavior under GHC 6.6.1, and asl of #haskell tells me he duplicated the import problem using GHCi version 6.8.0.20071019.

-- gwern