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tcfail174.hs:9:10:
Couldn't match expected type `forall a. a -> a'
with actual type `a0 -> a0'
In the first argument of `Base', namely `id'
In the expression: Base id
In an equation for `g': g = Base id
tcfail174.hs:13:14:
Couldn't match type `a' with `a1'
`a' is a rigid type variable bound by
the inferred type of h1 :: Capture a at tcfail174.hs:13:1
`a1' is a rigid type variable bound by
the type forall a1. a1 -> a1 at tcfail174.hs:13:14
Expected type: Capture (forall x. x -> a)
Actual type: Capture (forall a. a -> a)
In the first argument of `Capture', namely `g'
In the expression: Capture g
In an equation for `h1': h1 = Capture g
tcfail174.hs:16:14:
Couldn't match type `a' with `b'
`a' is a rigid type variable bound by
the type forall a. a -> a at tcfail174.hs:16:14
`b' is a rigid type variable bound by
the type signature for h2 :: Capture b at tcfail174.hs:15:15
Expected type: Capture (forall x. x -> b)
Actual type: Capture (forall a. a -> a)
In the first argument of `Capture', namely `g'
In the expression: Capture g
In an equation for `h2': h2 = Capture g
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