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T11452.hs:6:14: error:
• Illegal polytype: (forall a. a -> a) -> ()
The type of a Typed Template Haskell expression must not have any quantification.
• In the Template Haskell splice $$([|| \ _ -> () ||])
In the expression: $$([|| \ _ -> () ||])
In an equation for ‘impred’: impred = $$([|| \ _ -> () ||])
T11452.hs:6:14: error:
• Cannot instantiate unification variable ‘p0’
with a type involving polytypes: forall a. a -> a
GHC doesn't yet support impredicative polymorphism
• In the Template Haskell quotation [|| \ _ -> () ||]
In the expression: [|| \ _ -> () ||]
In the Template Haskell splice $$([|| \ _ -> () ||])
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