I just updated my project to Kotlin 1.8.0 and now it can't deserialize a json array response: I have some simple code like this (Compose web):

var cards by remember { mutableStateOf<List<Card>>(emptyList()) }
cards = http.get("/cards").body()

Which throws an error:

TypeError: other.isEmpty_y1axqb_k$ is not a function
    equals Collections.kt:27
    equals_1 coreRuntime.kt:17
    equivalent_ika8t0_k$ SnapshotMutationPolicy.kt:90
    equivalent_f1gjis_k$ androidx-runtime.js:16246
    set_value_rnwamw_k$ Snapshot.kt:116
    CardPage$composable$lambda_4 CardPage.kt:108
    doResume_5yljmg_k$ CardPage.kt:36
    resumeWith_7onugl_k$ Standard.kt:55
    resumeWith_s3a3yh_k$ kotlin-kotlin-stdlib-js-ir.js:25366
    run_mw4iiu_k$ Continuation.kt:45
    lambda JsMicrotasksDispatcher.kt:11
CoroutineExceptionHandlerImpl.kt:11:12
    handleCoroutineExceptionImpl CoroutineExceptionHandlerImpl.kt:11
    handleCoroutineException CoroutineExceptionHandler.kt:33
    handleJobException_oc4gxk_k$ Builders.common.kt:196
    finalizeFinishingState JobSupport.kt:229
    tryMakeCompletingSlowPath JobSupport.kt:906
    tryMakeCompleting JobSupport.kt:863
    makeCompletingOnce_b13xy2_k$ JobSupport.kt:828
    resumeWith_s3a3yh_k$ AbstractCoroutine.kt:100
    resumeWith_7onugl_k$ Continuation.kt:54
    resumeWith_s3a3yh_k$ kotlin-kotlin-stdlib-js-ir.js:25366
    run_mw4iiu_k$ Continuation.kt:45
    lambda JsMicrotasksDispatcher.kt:11

Btw I'm not really familiar with compose for web, but one issue I do see: you are running the http call there in the compose function body. That means the http call will be made every single time the compose function is called (which can be quite a lot), that is almost certainly not what you want. I think you need to use LaunchedEffect to actually run the http call. The effect can run once, update the state, which would then trigger recomposition.

Yeah in my code it's in a LaunchedEffect, it's something with Ktor JS

I experience a similar problem since i updated to kotlin 1.8.0. But with a coroutine. https://youtrack.jetbrains.com/issue/KT-56788

Yes my code (now slightly changed) is at https://github.com/Queatz/ailaai-web/blob/main/src/jsMain/kotlin/components/CardPage.kt#L37

I found it already and i try to add my bug right now.

It would be /card/2/cards but card 2 would have to exist

how do i get a existing card?

You could just make that endpoint return a mock list of cards

Can i add a zip of your project to my issue as an example for the type error?

Yeah np

thank you