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T7453.hs:10:30:
Couldn't match expected type ‛t1’ with actual type ‛t’
because type variable ‛t1’ would escape its scope
This (rigid, skolem) type variable is bound by
the type signature for z :: Id t1
at T7453.hs:8:16-19
Relevant bindings include
cast1 :: t -> a (bound at T7453.hs:7:1)
v :: t (bound at T7453.hs:7:7)
z :: Id t1 (bound at T7453.hs:9:11)
aux :: Id t1 (bound at T7453.hs:10:21)
In the first argument of ‛Id’, namely ‛v’
In the expression: Id v
In an equation for ‛aux’: aux = Id v
T7453.hs:16:33:
Couldn't match expected type ‛t2’ with actual type ‛t’
because type variable ‛t2’ would escape its scope
This (rigid, skolem) type variable is bound by
the type signature for z :: () -> t2
at T7453.hs:14:16-22
Relevant bindings include
cast2 :: t -> t1 (bound at T7453.hs:13:1)
v :: t (bound at T7453.hs:13:7)
z :: () -> t2 (bound at T7453.hs:15:11)
aux :: b -> t2 (bound at T7453.hs:16:21)
In the first argument of ‛const’, namely ‛v’
In the expression: const v
In an equation for ‛aux’: aux = const v
T7453.hs:21:15:
Couldn't match expected type ‛t2’ with actual type ‛t’
because type variable ‛t2’ would escape its scope
This (rigid, skolem) type variable is bound by
the type signature for z :: t2
at T7453.hs:20:16
Relevant bindings include
cast3 :: t -> t1 (bound at T7453.hs:19:1)
v :: t (bound at T7453.hs:19:7)
z :: t2 (bound at T7453.hs:21:11)
aux :: forall b. b -> t2 (bound at T7453.hs:22:21)
In the expression: v
In an equation for ‛z’:
z = v
where
aux = const v
In an equation for ‛cast3’:
cast3 v
= z
where
z :: t
z = v
where
aux = const v
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