return
	}
	start := strings.LastIndex(s, "[")
	o.Marker = s[:start]
	end := strings.LastIndex(s, "]")
	tag := strings.Trim(s[start:end], "[]")
	tags := strings.SplitSeq(tag, ",")
	for tag := range tags {
		kv := strings.Split(tag, ":")
		if len(kv) < 2 {
			continue
		}
		switch kv[0] {
		case "minio_cache":
			if kv[1] != markerTagVersion {
				continue
			}

	// get runtime stack buffer.
	buf := debug.Stack()
	// runtime stack of go routines will be listed with 2 blank spaces between each of them, so split on "\n\n" .
	for g := range strings.SplitSeq(string(buf), "\n\n") {
		// Again split on a new line, the first line of the second half contains the info about the go routine.
		sl := strings.SplitN(g, "\n", 2)
		if len(sl) != 2 {
			continue
		}