Issues with Error Catching in K6 Scripts When Using function and Arrow Functions (() => {})

[Nuoky]

Brief summary

When using an arrow function under specific conditions and calling "this", the try - catch within the context cannot catch the error normally.

k6 version

0.55

OS

Ubuntu

Docker version and image (if applicable)

No response

Steps to reproduce the problem

script.js:

export class DEMO {
    constructor() {
        this.any = ''
    }

    ok_demo = () => {
        const error_demo = () => {
            console.log('The problem will be triggered as long as any "this" is called.', this.any)
        };

        try {
            throw(new Error("test1"))
        } catch (error) {
            console.log("this", this)
            console.log("error", error)
            console.log("error.message", error.message)
        }
    };

    issue_demo = function () {
        const error_demo = () => {
            console.log('The problem will be triggered as long as any "this" is called.', this.any)
        };

        try {
            throw(new Error("test2"))
        } catch (error) {
            console.log("this", this)
            console.log("error", error)
            console.log("error.message", error.message)
        }
    } 
}


export default async () => {
    const demo = new DEMO();
    await demo.ok_demo();

    console.log('--------------------------------------------')

    await demo.issue_demo();
}

run:

k6 run script.js

You can see that the captured error is actually "this" itself.

Expected behaviour

output:

INFO[0000] this {"any":""}                               source=console
INFO[0000] error {}                                      source=console
INFO[0000] error.message test1                           source=console
INFO[0000] --------------------------------------------  source=console
INFO[0000] this {"any":""}                               source=console
INFO[0000] error {}                                      source=console
INFO[0000] error.message test2                           source=console

Actual behaviour

output:

INFO[0000] this {"any":""}                               source=console
INFO[0000] error {}                                      source=console
INFO[0000] error.message test1                           source=console
INFO[0000] --------------------------------------------  source=console
INFO[0000] this {"any":""}                               source=console
INFO[0000] error {"any":""}                             source=console
INFO[0000] error.message undefined                      source=console