{"ast_node_type":"other","tokens":[{"end":80,"kind":"keyword","start":0,"text":"//"}]}
        // `0..first_lo` range and the `0..first_hi` range give the same result.
        // that it does not kill the borrow in the `first_lo..=first_hi` range, so checking the
        while let Some(block) = self.visit_stack.pop() {