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T12512.hs:10:1: error: [GHC-00158]
• Can't make a derived instance of ‘Wat1 (# a, b #)’:
‘Wat1’ is not a stock derivable class (Eq, Show, etc.)
• In the stand-alone deriving instance for ‘Wat1 (# a, b #)’
Suggested fix: Perhaps you intended to use DeriveAnyClass
T12512.hs:13:1: error: [GHC-00158]
• Can't make a derived instance of ‘Wat2 (# a | b #)’:
‘Wat2’ is not a stock derivable class (Eq, Show, etc.)
• In the stand-alone deriving instance for ‘Wat2 (# a | b #)’
Suggested fix: Perhaps you intended to use DeriveAnyClass
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