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# Error code E0069

The compiler found a function whose body contains a `return;` statement but whose return type is not `()`.

Erroneous code example:

    #![allow(unused)]
    fn main() {
    // error
    fn foo() -> u8 {
        return;
    }
    }

Since `return;` is just like `return ();`, there is a mismatch between the function's return type and the value being returned.