I am getting a crash with KMP and the Material3 da...

# compose-desktop

[v79]

I am getting a crash with KMP and the Material3 date picker. Pretty easy to replicate - just add val dpState = rememberDatePickerState() to any composable function and it will crash during composition - error is Caused by: java.lang.ClassNotFoundException: kotlinx.datetime.Clock$System . My project does include kotlinx.datetime and I use it elsewhere. The same code works on Android. I can produce different errors by varying the parameters in the call to rememberDatePickerState().

[v79]

Looks to be resolved by switching the compose.material3 library:

//            implementation(compose.material3)
            implementation("org.jetbrains.compose.material3:material3:1.9.0-beta06")

I found this suggestion in a YouTrack comment about an iOS crash with the DatePicker - https://youtrack.jetbrains.com/issue/CMP-8929/IrLinkageError-when-using-Clock.System-kot[…]-datetime-in-Compose-DatePicker-on-iOS?backToIssues=false

[Oliver.O]

Probably related to this one: https://github.com/Kotlin/kotlinx-datetime?tab=readme-ov-file#deprecation-of-instant

[v79]

Probably! I was using 0.7.1 in my own code but I guess whatever version of compose.material3 was using was older.

[ferdialif02]

either use 0.7.1 alongside with 1.10.1 alpha material3 or use 0.7.1-0.6.x compat

[Sean Proctor]

You don't need to use 1.10 alpha, the 1.9 beta works. compose 1.9.0 is still using material3 based on 1.3. The change was made in the material3 1.4 branch, which hasn't made it to stable yet. So using the multiplatform 1.9 beta branch for material3 or adding the compat dependency will work.