Method update

crates/cranelift/src/debug/transform/unit.rs:32–36

(&mut self, depth: isize)

    }

    fn update(&mut self, depth: isize) {
        while !self.stack.is_empty() && self.stack.last().unwrap().0 >= depth {
            self.stack.pop();
        }
    }

    pub fn push(&mut self, depth: isize, value: T) {
        self.stack.push((depth, value));