message: No exception if decoder was destroyed first
diff: @@ -379,8 +379,6 @@ export class ConcurrentWorkerSet {
  | WorkerServiceProtocol.ServiceRequest,
  transferList?: ArrayBuffer[]
  ): Promise<Res[]> {
  - this.ensureStarted();
  -
  const promises = [];
  for (const worker of this.m_workers) {
  const messageId = this.m_nextMessageId++;
  