JuliusBrussee/caveman · error

content or tool_calls required

Error message

content or tool_calls required

What it means

Error "content or tool_calls required" thrown in JuliusBrussee/caveman.

Source

Thrown at cacheengine/cachebench/corpus.go:356

		}
	}
	return CorpusRow{
		RowIndex: index, SessionID: wire.SessionID, Model: wire.Model, Input: messages,
		OutputLength: wire.OutputLength, PreGap: wire.PreGap,
	}, nil
}

func validateCorpusMessage(message CorpusMessage, limits CorpusLimits) error {
	switch message.Role {
	case "system", "developer", "user", "assistant", "tool":
	default:
		return fmt.Errorf("unsupported role %q", message.Role)
	}
	if !validBoundedText(message.ToolCallID, 2048, true) || !validBoundedText(message.Name, 512, true) {
		return errors.New("invalid message identity")
	}
	if len(message.Content) == 0 && len(message.ToolCalls) == 0 {
		return errors.New("content or tool_calls required")
	}
	if len(message.Content) > limits.MaxMessageBytes || (len(message.Content) > 0 && !json.Valid(message.Content)) {
		return errors.New("content invalid or exceeds limit")
	}
	messageBytes := len(message.Content) + len(message.Role) + len(message.ToolCallID) + len(message.Name)
	if len(message.Content) > 0 {
		var content any
		if err := json.Unmarshal(message.Content, &content); err != nil {
			return errors.New("content must decode")
		}
		if content != nil {
			if _, ok := content.(string); !ok {
				return errors.New("content must be string or null")
			}
		}
	}
	for _, call := range message.ToolCalls {
		if call.Type != "function" || !validBoundedText(call.ID, 2048, false) || !validBoundedText(call.Function.Name, 512, false) || !validUniqueJSONObject([]byte(call.Function.Arguments)) {

View on GitHub (pinned to 27d5a3981a)

Solutions

1. Provide content or tool_calls on the message.

When it happens

Trigger: Thrown at cacheengine/cachebench/corpus.go:356 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/051c25d78c2c8a8b. Report an issue: GitHub.