srecord noeq FastCollabWorker(ICollab collab) extends Thread {
  volatile gettable long errorCount;
  volatile gettable Throwable lastError;
  
  run {
    Runnable work;
    
    while ((work = collab.grabWork()) != collab.done) {
      try {
        work?.run();
      } catch e {
        ++errorCount;
        lastError = e;
      }
    }
  }
}