2 CustomTypeErrors02.hs:17:1: error:
3 • The type 'a_aEN -> a_aEN' cannot be represented as an integer.
4 • When checking that ‘err’ has the inferred type
7 CustomTypeErrors02.hs:17:7: error:
8 • The type 'a0 -> a0' cannot be represented as an integer.
9 • In the expression: convert id
10 In an equation for ‘err’: err = convert id