if err := checkListObjsArgs(ctx, bucket, prefix, ""); err != nil {
		xioutil.SafeClose(results)
		return err
	}
	parentCtx := ctx
	ctx, cancelCause := context.WithCancelCause(ctx)
	var entries []chan metaCacheEntry

	for poolIdx, erasureSet := range z.serverPools {
		for setIdx, set := range erasureSet.sets {
			set := set
			listOut := make(chan metaCacheEntry, 1)

	//     after reading the request body.
	//   - For an HTTP/2 request, RoundTrip cancels this context after the HTTP/2
	//     RoundTripper returns.
	ctx, cancel := context.WithCancelCause(req.Context())

	// Convert Request.Cancel into context cancelation.
	if origReq.Cancel != nil {
		go awaitLegacyCancel(ctx, cancel, origReq)
	}