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RepPolyArrowFun.hs:29:19: error: [GHC-55287]
• • The function in the first order arrow application of
‘undefined’
to
‘x’
does not have a fixed runtime representation.
Its type is:
arr a a :: TYPE r
• The return type of the arrow function
‘first’
does not have a fixed runtime representation.
Its type is:
arr (b, d) (c, d) :: TYPE r
• The return type of the arrow function
‘(>>>)’
does not have a fixed runtime representation.
Its type is:
arr a c :: TYPE r
• The return type of the arrow function
‘arr’
does not have a fixed runtime representation.
Its type is:
arr b c :: TYPE r
• In the command: undefined -< x
In the expression: proc x -> undefined -< x
In an equation for ‘foo’: foo _ = proc x -> undefined -< x
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