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[1 of 2] Compiling GFunctor (.hs -> .o)
[2 of 2] Compiling T5462No1 (.hs -> .o)
T5462No1.hs:24:42: error:
Can't make a derived instance of ‘GFunctor F’:
‘GFunctor’ is not a stock derivable class (Eq, Show, etc.)
Try GeneralizedNewtypeDeriving for GHC's newtype-deriving extension
In the newtype declaration for ‘F’
T5462No1.hs:26:23: error:
Can't make a derived instance of ‘C1 G’:
‘C1’ is not a stock derivable class (Eq, Show, etc.)
Try enabling DeriveAnyClass
In the data declaration for ‘G’
T5462No1.hs:27:23: error:
Can't make a derived instance of ‘C2 H’:
‘C2’ is not a stock derivable class (Eq, Show, etc.)
Try enabling DeriveAnyClass
In the data declaration for ‘H’
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