{"ast_node_type":"variable","tokens":[{"end":85,"kind":"keyword","start":0,"text":"let"}]}
        let sp = self.tcx.sess.source_map().start_point(expr.span).with_parent(None);
    ) -> bool {
        if let Some(sp) = self.tcx.sess.psess.ambiguous_block_expr_parse.borrow().get(&sp) {