avoid warnings when built with ghc 7.6

Annex/Exception.hs

@@ -13,24 +13,27 @@
 module Annex.Exception (
 	bracketIO,
 	tryAnnex,
-	throw,
+	throwAnnex,
 	catchAnnex,
 ) where
 
-import Prelude hiding (catch)
-import "MonadCatchIO-transformers" Control.Monad.CatchIO (bracket, try, throw, catch)
-import Control.Exception hiding (handle, try, throw, bracket, catch)
+import qualified "MonadCatchIO-transformers" Control.Monad.CatchIO as M
+import Control.Exception
 
 import Common.Annex
 
 {- Runs an Annex action, with setup and cleanup both in the IO monad. -}
 bracketIO :: IO v -> (v -> IO b) -> (v -> Annex a) -> Annex a
-bracketIO setup cleanup go = bracket (liftIO setup) (liftIO . cleanup) go
+bracketIO setup cleanup go = M.bracket (liftIO setup) (liftIO . cleanup) go
 
 {- try in the Annex monad -}
 tryAnnex :: Annex a -> Annex (Either SomeException a)
-tryAnnex = try
+tryAnnex = M.try
+
+{- throw in the Annex monad -}
+throwAnnex :: Exception e => e -> Annex a
+throwAnnex = M.throw
 
 {- catch in the Annex monad -}
 catchAnnex :: Exception e => Annex a -> (e -> Annex a) -> Annex a
-catchAnnex = catch
+catchAnnex = M.catch

Command/Add.hs

@@ -174,7 +174,7 @@ undo file key e = do
 		liftIO $ nukeFile file
 		catchAnnex (fromAnnex key file) tryharder
 		logStatus key InfoMissing
-	throw e
+	throwAnnex e
   where
 	-- fromAnnex could fail if the file ownership is weird
 	tryharder :: IOException -> Annex ()

Utility/Exception.hs

@@ -9,8 +9,8 @@
 
 module Utility.Exception where
 
-import Prelude hiding (catch)
 import Control.Exception
+import qualified Control.Exception as E
 import Control.Applicative
 import Control.Monad
 import System.IO.Error (isDoesNotExistError)
@@ -33,7 +33,7 @@ catchMsgIO a = either (Left . show) Right <$> tryIO a
 
 {- catch specialized for IO errors only -}
 catchIO :: IO a -> (IOException -> IO a) -> IO a
-catchIO = catch
+catchIO = E.catch
 
 {- try specialized for IO errors only -}
 tryIO :: IO a -> IO (Either IOException a)

Utility/Mounts.hsc

@@ -20,8 +20,6 @@ module Utility.Mounts (
 import Control.Monad
 import Foreign
 import Foreign.C
-import GHC.IO hiding (finally, bracket)
-import Prelude hiding (catch)
 #include "libmounts.h"
 #else
 import Utility.Exception