{"ast_node_type":"variable","tokens":[{"end":48,"kind":"keyword","start":0,"text":"let"}]}
        let mut finder = SingleUseConstsFinder {
    fn run_pass(&self, tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
            ineligible_locals: DenseBitSet::new_empty(body.local_decls.len()),