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rnfail026.hs:16:27: error:
The first argument of ‘Monad’ should have kind ‘* -> *’,
but ‘Eq a => Set a’ has kind ‘*’
In the instance declaration for ‘Monad (forall a. Eq a => Set a)’
rnfail026.hs:19:10: error:
Illegal polymorphic or qualified type: forall a. [a]
In the instance declaration for ‘Eq (forall a. [a])’
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