1 files changed, 18 insertions, 0 deletions
diff --git a/testsuite/tests/typecheck/should_run/T1735_Help/State.hs b/testsuite/tests/typecheck/should_run/T1735_Help/State.hs
new file mode 100644
index 0000000000..7b048eb2df
--- /dev/null
+++ b/testsuite/tests/typecheck/should_run/T1735_Help/State.hs
@@ -0,0 +1,18 @@
+
+module T1735_Help.State where
+
+newtype StateT s m a = StateT { runStateT :: s -> m (a,s) }
+
+instance Monad m => Monad (StateT s m) where
+    return a = StateT $ \s -> return (a, s)
+    m >>= k  = StateT $ \s -> do
+        ~(a, s') <- runStateT m s
+        runStateT (k a) s'
+    fail str = StateT $ \_ -> fail str
+
+get :: Monad m => StateT s m s
+get = StateT $ \s -> return (s, s)
+
+put :: Monad m => s -> StateT s m ()
+put s = StateT $ \_ -> return ((), s)
+