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T19977a.hs:11:7: error:
• Could not deduce ‘Show a’ arising from a use of ‘f’
from the context: Show [a]
bound by the type signature for:
g :: forall a. Show [a] => a -> String
at T19977a.hs:10:1-28
Possible fix:
add (Show a) to the context of
the type signature for:
g :: forall a. Show [a] => a -> String
• In the expression: f x
In an equation for ‘g’: g x = f x
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