JuliusBrussee/caveman · error

duplicate or invalid JSON

Error message

duplicate or invalid JSON

What it means

Error "duplicate or invalid JSON" thrown in JuliusBrussee/caveman.

Source

Thrown at cacheengine/cachebench/corpus.go:302

			return nil, errors.New("cachebench: malformed Hugging Face rows array")
		}
	}
	if end, err := decoder.Token(); err != nil || end != json.Delim('}') {
		return nil, errors.New("cachebench: malformed Hugging Face rows object")
	}
	var trailing any
	if err := decoder.Decode(&trailing); err != io.EOF {
		return nil, errors.New("cachebench: trailing JSON after Hugging Face rows object")
	}
	if !foundRows {
		return nil, errors.New("cachebench: Hugging Face response has no rows field")
	}
	return rows, nil
}

func decodeOneJSON(raw []byte, destination any) error {
	if !validUniqueJSONObject(raw) {
		return errors.New("duplicate or invalid JSON")
	}
	decoder := json.NewDecoder(bytes.NewReader(raw))
	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)

View on GitHub (pinned to 27d5a3981a)

Solutions

1. Fix duplicate keys or invalid JSON in the corpus input.

When it happens

Trigger: Thrown at cacheengine/cachebench/corpus.go:302 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 JuliusBrussee/caveman@27d5a3981a (2026-08-15). Data as JSON: /api/errors/a4ea1aab600bfed5. Report an issue: GitHub.