{"ast_node_type":"other","tokens":[{"end":62,"kind":"keyword","start":0,"text":"is_nightly_build:"}]}
                    is_nightly_build: sess.is_nightly_build(),
                        .unwrap_or_else(|| "<unknown>".to_string()),
                    profiler_runtime: Symbol::intern(&sess.opts.unstable_opts.profiler_runtime),