JuliusBrussee/caveman · error

input must be valid non-empty message array

Error message

input must be valid non-empty message array

What it means

Error "input must be valid non-empty message array" thrown in JuliusBrussee/caveman.

Source

Thrown at cacheengine/cachebench/corpus.go:323

	if err := decoder.Decode(destination); err != nil {
		return err
	}
	var trailing any
	if err := decoder.Decode(&trailing); err != io.EOF {
		return errors.New("trailing JSON")
	}
	return nil
}

func validateCorpusWire(wire lmcacheRowWire, index int, limits CorpusLimits) (CorpusRow, error) {
	if !validBoundedText(wire.SessionID, 2048, false) || !validBoundedText(wire.Model, 512, false) {
		return CorpusRow{}, errors.New("session_id and model required")
	}
	if wire.OutputLength < 0 || math.IsNaN(wire.PreGap) || math.IsInf(wire.PreGap, 0) || wire.PreGap < 0 || wire.PreGap > maxCorpusGapSeconds {
		return CorpusRow{}, fmt.Errorf("output_length must be non-negative and pre_gap must be within 0..%d seconds", maxCorpusGapSeconds)
	}
	if len(wire.Input) == 0 || !json.Valid(wire.Input) {
		return CorpusRow{}, errors.New("input must be valid non-empty message array")
	}
	if len(wire.SessionID)+len(wire.Model)+len(wire.Input) > limits.MaxRowBytes {
		return CorpusRow{}, fmt.Errorf("row exceeds byte limit %d", limits.MaxRowBytes)
	}
	var messages []CorpusMessage
	if err := json.Unmarshal(wire.Input, &messages); err != nil {
		return CorpusRow{}, fmt.Errorf("decode input: %w", err)
	}
	if len(messages) == 0 || len(messages) > limits.MaxMessagesPerRequest {
		return CorpusRow{}, fmt.Errorf("message count %d outside 1..%d", len(messages), limits.MaxMessagesPerRequest)
	}
	for messageIndex, message := range messages {
		if err := validateCorpusMessage(message, limits); err != nil {
			return CorpusRow{}, fmt.Errorf("message %d: %w", messageIndex, err)
		}
	}
	return CorpusRow{
		RowIndex: index, SessionID: wire.SessionID, Model: wire.Model, Input: messages,

View on GitHub (pinned to 27d5a3981a)

Solutions

1. Provide a valid, non-empty message array as input.

When it happens

Trigger: Thrown at cacheengine/cachebench/corpus.go:323 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of JuliusBrussee/caveman@27d5a3981a (2026-08-15). Data as JSON: /api/errors/e6c0a456f2d456bb. Report an issue: GitHub.