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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
tcfail174.hs:13:14:
Couldn't match type ‛a’ with ‛a1’
because type variable ‛a1’ would escape its scope
This (rigid, skolem) type variable is bound by
the type forall a2. a2 -> a2
at tcfail174.hs:13:14
Expected type: Capture (forall x. x -> a)
Actual type: Capture (forall a. a -> a)
Relevant bindings include
h1 :: Capture a (bound at tcfail174.hs:13:1)
In the first argument of ‛Capture’, namely ‛g’
In the expression: Capture g
tcfail174.hs:16:14:
Couldn't match type ‛a’ with ‛b’
‛a’ is a rigid type variable bound by
the type forall a1. a1 -> a1 at tcfail174.hs:16:14
‛b’ is a rigid type variable bound by
the type signature for h2 :: Capture b at tcfail174.hs:15:7
Expected type: Capture (forall x. x -> b)
Actual type: Capture (forall a. a -> a)
Relevant bindings include
h2 :: Capture b (bound at tcfail174.hs:16:1)
In the first argument of ‛Capture’, namely ‛g’
In the expression: Capture g
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