fix build with ghc 7.6.3

This commit is contained in:
Joey Hess 2016-04-08 16:09:00 -04:00
parent c4be17d159
commit 56dee9af10
Failed to extract signature

View file

@ -149,7 +149,7 @@ treeItemsToTree = go M.empty
- this avoids buffering the whole tree in memory.
-}
adjustTree
:: (MonadIO m, MonadMask m)
:: (Functor m, MonadIO m, MonadMask m)
=> (TreeItem -> m (Maybe TreeItem))
-- ^ Adjust an item in the tree. Nothing deletes the item.
-- Cannot move the item to a different tree.