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T3208b.hs:15:10:
Could not deduce (STerm a0 ~ STerm a)
from the context (OTerm a ~ STerm a, OBJECT a, SUBST a)
bound by the type signature for
fce' :: (OTerm a ~ STerm a, OBJECT a, SUBST a) => a -> c
at T3208b.hs:15:1-22
NB: `STerm' is a type function, and may not be injective
The type variable `a0' is ambiguous
Possible fix: add a type signature that fixes these type variable(s)
Expected type: STerm a0
Actual type: OTerm a0
In the expression: fce (apply f)
In an equation for fce': fce' f = fce (apply f)
T3208b.hs:15:15:
Could not deduce (STerm a ~ OTerm a0)
from the context (OTerm a ~ STerm a, OBJECT a, SUBST a)
bound by the type signature for
fce' :: (OTerm a ~ STerm a, OBJECT a, SUBST a) => a -> c
at T3208b.hs:15:1-22
The type variable `a0' is ambiguous
Possible fix: add a type signature that fixes these type variable(s)
In the first argument of `fce', namely `(apply f)'
In the expression: fce (apply f)
In an equation for fce': fce' f = fce (apply f)
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