Hi! Did somebody encounter this problem before? ``...

# javascript

[Császár Ákos]

Hi!
Did somebody encounter this problem before?

Uncaught TypeError: Cannot read properties of undefined (reading 'z')
    at Object.<anonymous> (ThreadLocal.kt:31:1)
    at ThreadLocal.kt:31:1
    at ./node_modules/akoskmm/packages/apilib/kotlin/apilib.js (ThreadLocal.kt:31:1)
    at options.factory (react refresh:6:1)
    at __webpack_require__ (bootstrap:24:1)
    at fn (hot module replacement:62:1)
    at ./src/App.js (logo.svg:29:1)
    at options.factory (react refresh:6:1)
    at __webpack_require__ (bootstrap:24:1)
    at fn (hot module replacement:62:1)

Looks like an issue with stately <http://localhost:3000/runner/work/Stately/Stately/stately-concurrency/src/jsMain/kotlin/co/touchlab/stately/concurrency/ThreadLocal.kt>

[Artem Kobzar]

Could I ask to to create a ticket with the reproducer?

[Császár Ákos]

Sure. I will try to find some time for it in the following days.

[Artem Kobzar]

Thank you 🙏

[andylamax]

ThreadLocal.kt is js?? that is interesting

[Császár Ákos]

So the problem is with the multi module projects.
I have a multi module project (2 KMP module, core and client).
RockieHUN/ThreadLocalReproducer (github.com)
Client module depends on Core module.
• I build the library with the jsBrowserProductionWebpack task of the client module.
• I export the package to an npm registry
• If I import it to a js project (RockieHUN/thread_local_reproducer_js (github.com)) the application instant crashes with similar error.

bootstrap:27  Uncaught TypeError: Cannot read properties of undefined (reading 'a')
    at Object.<anonymous> (index.js:7:1)
    at index.js:7:1
    at ./node_modules/threadlocalreproducer/packages/apilib/kotlin/apilib.js (index.js:7:1)
    at options.factory (react refresh:6:1)
    at __webpack_require__ (bootstrap:24:1)
    at fn (hot module replacement:62:1)
    at ./src/App.js (logo.svg:29:1)
    at options.factory (react refresh:6:1)
    at __webpack_require__ (bootstrap:24:1)
    at fn (hot module replacement:62:1)

[Császár Ákos]

It look like its not related to ThreadLocal. What is 100% that it happens with multi module projects.
I am not sure if it is a bug or I am doing something wrong. What do you think? If you say it is worth creating a ticket, I will do it.

[andylamax]

I am extensively using multi modules with multiplatform (including kotlin/js). And it works,
You need to create a ticket and within it, the possible smallest reproducer of your issue. Then it'll be easy to get help. coz we will have much information than we have now

[andylamax]

I see the code you posted is a reproducer already. Let me try going through it and see

[Császár Ákos]

Created the ticket.
Btw, no clue what is the exact cause of the issue. My only guess , for now , is the multi module setup, because the reproducer is almost empty.

KMP crash with multi module project (Kotlin/JS) : KT-65309 (jetbrains.com)

[Császár Ákos]

Update: I was using incorrect package.json file while exporting the library and this is why I was getting this error.