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-rw-r--r--Backend/Hash.hs6
1 files changed, 4 insertions, 2 deletions
diff --git a/Backend/Hash.hs b/Backend/Hash.hs
index 7967b1714..77e964bad 100644
--- a/Backend/Hash.hs
+++ b/Backend/Hash.hs
@@ -5,7 +5,7 @@
- Licensed under the GNU GPL version 3 or higher.
-}
-{-# LANGUAGE CPP #-}
+{-# LANGUAGE BangPatterns, CPP #-}
module Backend.Hash (
backends,
@@ -171,7 +171,9 @@ hashFile hash file filesize = go hash
go (SHA3Hash hashsize) = use (sha3Hasher hashsize)
go (SkeinHash hashsize) = use (skeinHasher hashsize)
- use hasher = liftIO $ hasher <$> L.readFile file
+ use hasher = liftIO $ do
+ !h <- hasher <$> L.readFile file
+ return h
usehasher hashsize = case shaHasher hashsize filesize of
Left sha -> use sha