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GenCannotDoRep0_0.hs:6:14: warning: [-Wdeprecated-flags (in -Wdefault)]
-XDatatypeContexts is deprecated: It was widely considered a misfeature, and has been removed from the Haskell language.
GenCannotDoRep0_0.hs:13:45: error:
• Can't make a derived instance of ‘Generic Dynamic’:
Constructor ‘Dynamic’ has existential type variables in its type
Possible fix: use a standalone deriving declaration instead
• In the data declaration for ‘Dynamic’
GenCannotDoRep0_0.hs:28:1: error:
• Can't make a derived instance of ‘Generic (D Int a)’:
D must not have a datatype context
• In the stand-alone deriving instance for ‘Generic (D Int a)’
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