I m getting a regression when migrating from 1 7 20 to 1 8 1

Question

I m getting a regression when migrating from 1 7 20 to 1 8 10 it this already known ```e java lang IllegalStateException IdSignature clash opensavvy decouple core UIMetadata initializeFor$composable| 575774612970147389 0 Existed declaration FUN IR EXTERNAL DECLARATION STUB name initializeFor$composable visibility public modality ABSTRACT lt gt $this opensavvy decouple core UIMetadata content kotlin Function2 lt androidx compose runtime Composer kotlin Int kotlin Unit gt $composer androidx compose runtime Composer $changed returnType kotlin Unit clashed with new FUN IR EXTERNAL DECLARATION STUB name initializeFor$composable visibility public modality ABSTRACT lt gt $this opensavvy decouple core UIMetadata content kotlin Function2 lt androidx compose runtime Composer kotlin Int kotlin Unit gt $composer androidx compose runtime Composer $changed returnType kotlin Unit```

Landry Norris · Answer

Looks like it s related to Compose Since you updated the Kotlin version did you also update the Compose version I remember there being a JS regression in one of the latest releases I want to say 1 3 0 but could be wrong What Compose version are you on

CLOVIS · Answer

Compose jb 1 3 1

CLOVIS · Answer

According to <https youtrack jetbrains com issue KT 56660 K2 MPP compiler backend crash on invoking a K Common constructor in K JS code> it s a false positive and indeed it seems to run fine when ignoring the error

Landry Norris · Answer

Is this something you can mark internal That sometimes helps when Compose for platforms other than JVM throw errors

CLOVIS · Answer

No it s an interface method

Landry Norris · Answer

Are you using K2 The linked ticket is a K2 bug Either way if it works it works

CLOVIS · Answer

I don t think so no

CLOVIS · Answer

Is K2 available for JS

Landry Norris · Answer

I think it s beta for all individual platforms not multiplatform yet You d have to either set the language version to 2 0 or pass Xuse k2 so you d know if you were using it

CLOVIS · Answer

Ah well I only do multiplatform so I guess that s why I didn t hear about it

Landry Norris · Answer

I believe multiplatform support is on the roadmap maybe it was completed for beta and I missed it It ll be a minute before K2 is default Likely sometime December or next January based on release cycles

CLOVIS · Answer

This is for Decouple I ll jump on K2 as soon as it supports it even if it s not the default

CLOVIS · Answer

I created a ticket for it <https youtrack jetbrains com issue KT 57508 IdSignatureClash regression when migrating from 1 7 20 to 1 8 10 on JS IR>