A percentile for not default values is undefined in the report

[yudintsevegor]

Brief summary

Setting thresholds for http_reuqest_duration with NOT the default (p(90), p(95)) will produce undefined in the output.

thresholds: {
	// 99.5% of requests should be below 50ms
	// 99.99% of requests should be below 100ms
	http_req_duration: ["p(99.5)<50", "p(99.99)<100"],
}

However, the threshold works completely fine.

k6 version

k6 v1.0.0-rc1

OS

macOS 15.2 (24C101)

Docker version and image (if applicable)

Steps to reproduce the problem

Setting thresholds for http_reuqest_duration with NOT the default (p(90), p(95)) will produce undefined in the output.

import http from "k6/http";
import { check, sleep } from "k6";

export const options = {
	thresholds: {
		// 99.5% of requests should be below 50ms
		// 99.99% of requests should be below 100ms
		http_req_duration: ["p(99.5)<50", "p(99.99)<100", "p(95)<200"],
	},
	scenarios: {
		ping: {
			executor: "ramping-arrival-rate",
			preAllocatedVUs: 100,
			exec: "ping",
			stages: [
				{ target: 10, duration: "5s" },
				{ target: 5, duration: "2s" },
			],
		},
	},
};

export function ping() {
	// let res = http.get("http://host.docker.internal:8888/ping");
	// let res = http.get("http://localhost:8888/ping");
	const res = http.get("https://test.k6.io");

	check(res, { kek: (r) => r.status === 202 });

	sleep(0.3);
}

However, the thresholds work completely fine., the issue lies in output.

Expected behaviour

The expected behaviour would be printing the actual result for provided percentiles.

F.e.

✗ 'p(99.5)<50' p(99.5)=107s
✗ 'p(99.99)<100' p(99.99)=3141692ms

Actual behaviour

The results are undefined:

  http_req_duration
    ✗ 'p(99.5)<50' p(99.5)=undefined
    ✗ 'p(99.99)<100' p(99.99)=undefined