{"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"for"}]}
    for (&hir_id, candidate) in &scope_tree.rvalue_candidates {
    debug!("rvalue_scope: rvalue_candidates={:?}", scope_tree.rvalue_candidates);
        let Node::Expr(expr) = tcx.hir_node(hir_id) else { bug!("hir node does not exist") };