@@ -24,6 +24,10 @@ import Control.Monad
24import Control.Monad.Fix
24import Control.Monad.Fix
27+#if !MIN_VERSION_base(4,13,0)
28+import Control.Monad.Fail
27-- | The only reason this exists is that there are a lot of instances for
31-- | The only reason this exists is that there are a lot of instances for
28-- 'EnvT, which simply pass the implementation to the inner 'm'
32-- 'EnvT, which simply pass the implementation to the inner 'm'
29-- such as 'MonadLogger'.
33-- such as 'MonadLogger'.