{"ast_node_type":"other","tokens":[{"end":80,"kind":"keyword","start":0,"text":"assert!(self.metas[cnum].is_none(),"}]}
        assert!(self.metas[cnum].is_none(), "Overwriting crate metadata entry");
    fn set_crate_data(&mut self, cnum: CrateNum, data: CrateMetadata) {
        self.metas[cnum] = Some(Box::new(data));