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RepPolyLeftSection2.hs:14:11: error:
• The argument ‘undefined’ of ‘f’
does not have a fixed runtime representation.
Its type is:
a0 :: TYPE c0
Cannot unify ‘r’ with the type variable ‘c0’
because it is not a concrete ‘RuntimeRep’.
• In the expression: undefined `f`
In an equation for ‘test1’: test1 = (undefined `f`)
• Relevant bindings include
test1 :: a -> a (bound at RepPolyLeftSection2.hs:14:1)
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