{"ast_node_type":"other","tokens":[{"end":121,"kind":"keyword","start":0,"text":"tracing::warn!(\"ignoring"}]}
                    tracing::warn!("ignoring -Zerror-metrics in favor of RUSTC_ICE for destination of ICE report files");
                if let Some(unstable_opts) = config && unstable_opts.metrics_dir.is_some() {
                }