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drvfail009.hs:10:31:
Can't make a derived instance of ‘C T1’
(even with cunning newtype deriving):
‘C’ does not have arity 1
In the newtype declaration for ‘T1’
drvfail009.hs:13:31:
Cannot derive well-kinded instance of form ‘Monad (T2 ...)’
Class ‘Monad’ expects an argument of kind ‘* -> *’
In the newtype declaration for ‘T2’
drvfail009.hs:16:33:
Can't make a derived instance of ‘Monad T3’
(even with cunning newtype deriving):
cannot eta-reduce the representation type enough
In the newtype declaration for ‘T3’
drvfail009.hs:19:42:
Can't make a derived instance of ‘Monad T4’
(even with cunning newtype deriving):
cannot eta-reduce the representation type enough
In the newtype declaration for ‘T4’
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