Unecessary Warning message

[andrewasd]

I tried this code:

#![allow(dead_code)]

fn fun() -> i32 {
    function() && return 1;

    panic!("stop");
}

fn function() -> bool {
    true
}

fn main() {}

where function is any function that returns a boolean , and it gives the warning
unused logical operator , but actually works as expected, so i think this warning should not come up.

[asquared31415]

The expression a && return val produces a value, though you will never observe it to be true, because if it is, it will return early. The logical operators are all set up so that it warns if they are not used because in most cases the programmer means to use the value for something. You are not actually using the returned value, since you never read it or assign it to any variable. An explicit discard let _ = a && return val; stops the warning because you indicate that you don't want to use the value and this is not a mistake.

[andrewasd]

@asquared31415 thank you

[HKalbasi]

Is my issue #88017 duplicate of this issue?