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T6069.hs:13:15:
Couldn't match type `ST s0 Int' with `forall s. ST s b0'
Expected type: ST s0 Int -> b0
Actual type: (forall s. ST s b0) -> b0
In the second argument of `(.)', namely `runST'
In the expression: print . runST
In the expression: (print . runST) fourty_two
T6069.hs:14:15:
Couldn't match type `ST s1 Int' with `forall s. ST s b1'
Expected type: ST s1 Int -> b1
Actual type: (forall s. ST s b1) -> b1
In the second argument of `(.)', namely `runST'
In the expression: (print . runST)
In the expression: (print . runST) $ fourty_two
T6069.hs:15:16:
Couldn't match type `ST s2 Int' with `forall s. ST s b2'
Expected type: ST s2 Int -> b2
Actual type: (forall s. ST s b2) -> b2
In the second argument of `(.)', namely `runST'
In the first argument of `($)', namely `(print . runST)'
In the expression: (print . runST) $
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