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T14561b.hs:12:9: error:
• Unsaturated use of a representation-polymorphic primitive function.
The first argument of ‘coerce’
does not have a fixed runtime representation.
Its type is:
a0 :: TYPE c0
Cannot unify ‘r’ with the type variable ‘c0’
because it is not a concrete ‘RuntimeRep’.
• In the expression: coerce
In an equation for ‘badId’: badId = coerce
• Relevant bindings include
badId :: a -> a (bound at T14561b.hs:12:1)
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