go-delve/delve · error

expected number after %s

Error message

expected number after %s

What it means

Error "expected number after %s" thrown in go-delve/delve.

Source

Thrown at pkg/terminal/command.go:2465

	full    bool
	offsets bool
	opts    api.StacktraceOptions

	ancestors     int
	ancestorDepth int
}

func parseStackArgs(argstr string) (stackArgs, error) {
	r := stackArgs{
		depth: 50,
		full:  false,
	}
	if argstr != "" {
		args := strings.Split(argstr, " ")
		for i := 0; i < len(args); i++ {
			numarg := func(name string) (int, error) {
				if i >= len(args) {
					return 0, fmt.Errorf("expected number after %s", name)
				}
				n, err := strconv.Atoi(args[i])
				if err != nil {
					return 0, fmt.Errorf("expected number after %s: %v", name, err)
				}
				return n, nil
			}
			switch args[i] {
			case "-full":
				r.full = true
			case "-offsets":
				r.offsets = true
			case "-defer":
				r.opts |= api.StacktraceReadDefers
			case "-mode":
				i++
				if i >= len(args) {
					return stackArgs{}, errors.New("expected normal, simple or fromg after -mode")

View on GitHub (pinned to a23773e6c3)

When it happens

Trigger: Thrown at pkg/terminal/command.go:2465 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of go-delve/delve@a23773e6c3 (2026-08-31). Data as JSON: /api/errors/7ef75732f39b403d. Report an issue: GitHub.