{"ast_node_type":"variable","tokens":[{"end":82,"kind":"keyword","start":0,"text":"let"}]}
                        let r = end.get_or_insert_with(|| self.new_basic_block());
                    if let Some(block) = self.lower_expr_to_place(*expr, place, then)? {
                        self.set_goto(block, *r, expr_id.into());