{"ast_node_type":"other","tokens":[{"end":61,"kind":"keyword","start":0,"text":"///"}]}
    /// warn the user about the match arms being unreachable.
    /// When the previously checked expression (the scrutinee) diverges,
    fn warn_arms_when_scrutinee_diverges(&self, arms: &'tcx [hir::Arm<'tcx>]) {