netbirdio/netbird · error

failed to parse line: %s

Error message

failed to parse line: %s

What it means

Error "failed to parse line: %s" thrown in netbirdio/netbird.

Source

Thrown at client/iface/freebsd/iface.go:44

}

func parseIfconfigOutput(output []byte) (*iface, error) {
	// TODO: implement without allocations
	lines := string(output)

	scanner := bufio.NewScanner(strings.NewReader(lines))

	var name, mtu, group string
	var ips []string

	for scanner.Scan() {
		line := scanner.Text()

		// If line contains ": flags", it's a line with interface information
		if strings.Contains(line, ": flags") {
			parts := strings.Fields(line)
			if len(parts) < 4 {
				return nil, fmt.Errorf("failed to parse line: %s", line)
			}
			name = strings.TrimSuffix(parts[0], ":")
			if strings.Contains(line, "mtu") {
				mtuIndex := 0
				for i, part := range parts {
					if part == "mtu" {
						mtuIndex = i
						break
					}
				}
				mtu = parts[mtuIndex+1]
			}
		}

		// If line contains "groups:", it's a line with interface group
		if strings.Contains(line, "groups:") {
			parts := strings.Fields(line)
			if len(parts) < 2 {

View on GitHub (pinned to 93e97f4bf1)

When it happens

Trigger: Thrown at client/iface/freebsd/iface.go:44 when the library encounters an invalid state.

Common situations: See trigger scenarios.

Understand the failure class

• Parsing and encoding errors: unexpected token, malformed input — why parsers reject input and how to find the real culprit.

AI-assisted analysis of netbirdio/netbird@93e97f4bf1 (2026-08-16). Data as JSON: /api/errors/6e53087f1cda474f. Report an issue: GitHub.