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tc141.hs:11:12:
You cannot bind scoped type variable `a'
in a pattern binding signature
In the pattern: p :: a
In the pattern: (p :: a, q :: a)
In a pattern binding: (p :: a, q :: a) = x
tc141.hs:11:31:
Couldn't match expected type `a1' with actual type `a'
`a1' is a rigid type variable bound by
an expression type signature: a1 at tc141.hs:11:31
`a' is a rigid type variable bound by
the inferred type of f :: (a, a) -> (t, a) at tc141.hs:11:1
In the expression: q :: a
In the expression: (q :: a, p)
In the expression: let (p :: a, q :: a) = x in (q :: a, p)
tc141.hs:13:13:
You cannot bind scoped type variable `a'
in a pattern binding signature
In the pattern: y :: a
In a pattern binding: y :: a = a
In the expression:
let y :: a = a in
let
v :: a
v = b
in v
tc141.hs:15:18:
Couldn't match expected type `a2' with actual type `t'
`a2' is a rigid type variable bound by
the type signature for v :: a2 at tc141.hs:14:19
`t' is a rigid type variable bound by
the inferred type of g :: a -> t -> a1 at tc141.hs:13:1
In the expression: b
In an equation for `v': v = b
In the expression:
let
v :: a
v = b
in v
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