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T20189.hs:6:5: error: [GHC-88464]
• Found hole: _ :: t
Where: ‘t’ is a rigid type variable bound by
the type signature for:
y :: forall t. (t ~ (forall x. Show x => x -> IO ())) => t
at T20189.hs:5:1-49
• In an equation for ‘y’: y = _
• Relevant bindings include y :: t (bound at T20189.hs:6:1)
Constraints include
t ~ (forall x. Show x => x -> IO ()) (from T20189.hs:5:1-49)
Valid hole fits include y :: t (bound at T20189.hs:6:1)
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