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T12512.hs:10:1: error:
• Can't make a derived instance of ‘Wat1 (# a, b #)’:
‘Wat1’ is not a stock derivable class (Eq, Show, etc.)
Try enabling DeriveAnyClass
• In the stand-alone deriving instance for ‘Wat1 (# a, b #)’
T12512.hs:13:1: error:
• Can't make a derived instance of ‘Wat2 (# a | b #)’:
‘Wat2’ is not a stock derivable class (Eq, Show, etc.)
Try enabling DeriveAnyClass
• In the stand-alone deriving instance for ‘Wat2 (# a | b #)’
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