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, 1 insertions, 2 deletions

diff --git a/Test.hs b/Test.hs
index 5032038ad..9a34835cc 100644
--- a/Test.hs
+++ b/Test.hs
@@ -20,7 +20,6 @@ import Options.Applicative hiding (command)
 #if MIN_VERSION_optparse_applicative(0,8,0)
 import qualified Options.Applicative.Types as Opt
 #endif
-import Control.Exception.Extensible
 import qualified Data.Map as M
 import qualified Text.JSON
 
@@ -1444,7 +1443,7 @@ indir testenv dir a = do
 		(try a::IO (Either SomeException ()))
 	case r of
 		Right () -> return ()
-		Left e -> throw e
+		Left e -> throwM e
 
 setuprepo :: TestEnv -> FilePath -> IO FilePath
 setuprepo testenv dir = do