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tcfail131.hs:7:9:
Could not deduce (b ~ Integer)
from the context (Num b)
bound by the type signature for g :: Num b => b -> b
at tcfail131.hs:6:8-22
‛b’ is a rigid type variable bound by
the type signature for g :: Num b => b -> b at tcfail131.hs:6:8
Relevant bindings include
x :: b (bound at tcfail131.hs:7:5)
g :: b -> b (bound at tcfail131.hs:7:3)
In the expression: f x x
In an equation for ‛g’: g x = f x x
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