tests/ui/lint/unused/must_use-unit.rs


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#![feature(never_type)]
#![deny(unused_must_use)]

#[must_use]
fn foo() {}

#[must_use]
fn bar() -> ! {
    unimplemented!()
}

fn main() {
    foo(); //~ ERROR unused return value of `foo`

    bar(); //~ ERROR unused return value of `bar`
}