https://github.com/mozilla/pdf.js/blob/0df1a5661958df0c4ed2f73b0f3266d825c5c280/src/display/api.js#L710-L719
The return type signature `@returns {Promise<{num: number, gen: number}>}` is mismatched with its definition. (should be `@returns {Promise<number>}`)
assert(
      reason instanceof Error ||
        (typeof reason === "object" && reason !== null),
      'PDFPageProxy._abortOperatorList: Expected "reason" argument.'
    );
    if (!intentState.streamReader) {
      return;
    }
    if (!force) {
      
      
      if (intentState.renderTasks.size > 0) {
        return;
      }
      
      
      
      if (reason instanceof RenderingCancelledException) {
        intentState.streamReaderCancelTimeout = setTimeout(() => {