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+
+{-# LANGUAGE RecursiveDo, DoRec #-}
+{-# OPTIONS_GHC -fno-warn-deprecated-flags #-}
+
+module M where
+
+-- do, mdo and rec should all open layouts
+
+f :: IO ()
+f = do print 'a'
+ print 'b'
+
+g :: IO ()
+g = mdo print 'a'
+ print 'b'
+
+h :: IO ()
+h = do print 'a'
+ rec print 'b'
+ print 'c'
+ print 'd'
+