trendAsNativeHistogram value must be true or false, not %q

Error message

trendAsNativeHistogram value must be true or false, not %q

What it means

Same pattern as insecureSkipTLSVerify: the trendAsNativeHistogram option value is parsed as a nullable bool via UnmarshalText and this error is raised when the value is not a valid boolean literal, rejecting the remote-write config string.

Source

Thrown at internal/output/prometheusrw/remotewrite/config.go:359

		case "url":
			c.ServerURL = null.StringFrom(v)
		case "insecureSkipTLSVerify":
			if err := c.InsecureSkipTLSVerify.UnmarshalText([]byte(v)); err != nil {
				return c, fmt.Errorf("insecureSkipTLSVerify value must be true or false, not %q", v)
			}
		case "tlsMinVersion":
			c.TLSMinVersion = null.StringFrom(v)
		case "username":
			c.Username = null.StringFrom(v)
		case "password":
			c.Password = null.StringFrom(v)
		case "pushInterval":
			if err := c.PushInterval.UnmarshalText([]byte(v)); err != nil {
				return c, err
			}
		case "trendAsNativeHistogram":
			if err := c.TrendAsNativeHistogram.UnmarshalText([]byte(v)); err != nil {
				return c, fmt.Errorf("trendAsNativeHistogram value must be true or false, not %q", v)
			}

		// TODO: add the support for trendStats
		// strvals doesn't support the same format used by --summary-trend-stats
		// using the comma as the separator, because it is already used for
		// dividing the keys.
		//nolint:gocritic
		//
		//if v, ok := params["trendStats"].(string); ok && len(v) > 0 {
		//c.TrendStats = strings.Split(v, ",")
		//}

		case "clientCertificate":
			c.ClientCertificate = null.StringFrom(v)
		case "clientCertificateKey":
			c.ClientCertificateKey = null.StringFrom(v)

		default:

View on GitHub (pinned to 01ffac6f24)

Solutions

Use trendAsNativeHistogram=true or trendAsNativeHistogram=false in the argument string

Defensive patterns

Strategy: validation

When it happens

Trigger: Thrown at internal/output/prometheusrw/remotewrite/config.go:359 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of grafana/k6@01ffac6f24 (2026-08-18). Data as JSON: /api/errors/85a7259aa3febd99. Report an issue: GitHub.