{"ast_node_type":"other","tokens":[{"end":84,"kind":"keyword","start":0,"text":"assert_eq!(self.metas.len(),"}]}
        assert_eq!(self.metas.len(), tcx.untracked().stable_crate_ids.read().len());
    ) -> Result<TyCtxtFeed<'tcx, CrateNum>, CrateError> {
        let num = tcx.create_crate_num(root.stable_crate_id()).map_err(|existing| {