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T13393.hs:61:3: error:
• Ambiguous type variable ‘t0’ arising from a use of ‘mapM’
prevents the constraint ‘(Traversable t0)’ from being solved.
Probable fix: use a type annotation to specify what ‘t0’ should be.
Potentially matching instances:
instance Traversable (Either a) -- Defined in ‘Data.Traversable’
instance Traversable Identity -- Defined in ‘Data.Traversable’
...plus four others
...plus 28 instances involving out-of-scope types
(use -fprint-potential-instances to see them all)
• In a stmt of a 'do' block:
mapM putBackLeftOverInputAndReturnOutput undefined
In the expression:
do mapM putBackLeftOverInputAndReturnOutput undefined
undefined
In an equation for ‘encodeLinearToAac’:
encodeLinearToAac
= do mapM putBackLeftOverInputAndReturnOutput undefined
undefined
where
putBackLeftOverInputAndReturnOutput (MkEncodeResult x)
= do leftOvers .= x
....
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