{"ast_node_type":"other","tokens":[{"end":57,"kind":"keyword","start":0,"text":"Err(cancelled)"}]}
                        Err(cancelled) => progress_sender
                            .send(ParallelPrimeCacheWorkerProgress::EndCrateDefMap { crate_id })?,
                            .send(ParallelPrimeCacheWorkerProgress::Cancelled(cancelled))?,