unify exception handling into Utility.Exception

Removed old extensible-exceptions, only needed for very old ghc.

Made webdav use Utility.Exception, to work after some changes in DAV's
exception handling.

Removed Annex.Exception. Mostly this was trivial, but note that
tryAnnex is replaced with tryNonAsync and catchAnnex replaced with
catchNonAsync. In theory that could be a behavior change, since the former
caught all exceptions, and the latter don't catch async exceptions.

However, in practice, nothing in the Annex monad uses async exceptions.
Grepping for throwTo and killThread only find stuff in the assistant,
which does not seem related.

Command.Add.undo is changed to accept a SomeException, and things
that use it for rollback now catch non-async exceptions, rather than
only IOExceptions.

1 files changed, 0 insertions, 1 deletions

diff --git a/Crypto.hs b/Crypto.hs
index 10d6e5cef..8d4d4f04f 100644
--- a/Crypto.hs
+++ b/Crypto.hs
@@ -38,7 +38,6 @@ import Data.ByteString.Lazy.UTF8 (fromString)
 import Control.Applicative
 import qualified Data.Map as M
 import Control.Monad.IO.Class
-import Control.Monad.Catch (MonadMask)
 
 import Common.Annex
 import qualified Utility.Gpg as Gpg