message: Perform safe summarize on failed summary as well as nack
diff: @@ -468,8 +468,8 @@ export class RunningSummarizer implements IDisposable {
  private async trySummarizeCore(reason: string): Promise<void> {
  const result = await this.summarize(reason, false);
  - if (result === false) {
  - // On nack, try again in safe mode
  + if (result !== true) {
  + // On nack or error, try again in safe mode
  await this.summarize(reason, true);
  }
  }
  