{"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"BackendConfig::from_opts(&tcx.sess.opts.cg.llvm_args)"}]}
            BackendConfig::from_opts(&tcx.sess.opts.cg.llvm_args)
        let config = self.config.clone().unwrap_or_else(|| {
                .unwrap_or_else(|err| tcx.sess.dcx().fatal(err))