GenCannotDoRep1_1.hs:1:29: warning: [-Wdeprecated-flags (in -Wdefault)]
    -XDatatypeContexts is deprecated: It was widely considered a misfeature, and has been removed from the Haskell language.

GenCannotDoRep1_1.hs:8:49: error: [GHC-30367]
    • Can't make a derived instance of ‘Generic1 Context’:
        Context must not have a datatype context
    • In the data declaration for ‘Context’