var unknownField *cbor.UnknownFieldError
	if errors.As(err, &unknownField) {
		// Unlike JSON, there are no strict errors in CBOR for duplicate map keys. CBOR maps
		// with duplicate keys are considered invalid according to the spec and are rejected
		// entirely.
		return runtime.NewStrictDecodingError([]error{unknownField}), modes.DecodeLax.Unmarshal(data, into)
	}
	return nil, err

		"Unknown time":           s.UnknownTime(),
	}
	for reason, dt := range s.BlockTimeByReason {
		stats["Block time ("+reason+")"] += dt
	}
	// N.B. Don't include RangeTime or TotalTime; they overlap with these other
	// stats.
	return stats
}

// UnknownTime returns whatever isn't accounted for in TotalTime.
func (s GoroutineExecStats) UnknownTime() time.Duration {