{"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":"//"}]}
                // This is more specific than pointing at the entire argument.
            if let hir::Node::Expr(arg_expr) = self.tcx.hir_node(arg.hir_id) {
                self.blame_specific_expr_if_possible(error, arg_expr)