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T7019a.hs:11:1: error: [GHC-91510]
• Illegal polymorphic type: forall b. Context (Associated a b)
A constraint must be a monotype
• In the context: forall b. Context (Associated a b)
While checking the super-classes of class ‘Class’
In the class declaration for ‘Class’
Suggested fix: Perhaps you intended to use QuantifiedConstraints
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