A modern programming language that makes developers happier.

kotlinlang

is `Compose` ready to work with `Kotlin 1.4.20` ?
I am asking it because I have a project working fine with `Kotlin 1.4.10` , but when I try to update it to `Kotlin 1.4.20`  the compilation fails:
```The root cause java.lang.NoSuchMethodError was thrown at: 
e: java.lang.IllegalStateException: Backend Internal error: Exception during file facade code generation
File being compiled: file:///Users/magnumrocha/personal/my_app/app/src/main/java/com/myapp/Commons.kt
androidx.compose.compiler.plugins.kotlin.lower.ClassStabilityFieldSerializationPlugin.afterClass(ClassStabilityFieldSerializationPlugin.kt:57)```
the `Commons.kt`:
```sealed class MenuAction(@StringRes val label: Int, val icon: VectorAsset) {
    object History : MenuAction(R.string.history_menu, Icons.Outlined.List)
    object About : MenuAction(R.string.about_menu, <http://Icons.Outlined.Info|Icons.Outlined.Info>)
}```

AFAIK compose alpha08 will be ready, but alpha07 is not

not alpha release, but they pushed it in snapshot for those who really need it

but, I can use `kotlin 1.4.10` with `compose 1.0.0-alpha08`

<@U01AJJV90NB> That error is an indication that you are not actually using Compose `1.0.0-alpha08`, as that error can only occurs if you are using Kotlin 1.4.20 with an older version of Compose.

<@UPYN20NQ0> Kotlin `1.4.10` does NOT work with Compose `1.0.0-alpha08` so if you are using Kotlin `1.4.10` then you are NOT using Compose `1.0.0-alpha08` and vice versa.

Be sure to check both your `kotlinCompilerVersion` and your `kotlinCompilerExtensionVersion` and to kill all gradle daemons and kill your gradle cache before performing your build.

<@U6158UG1Z> I've updated only the compose libraries, not the compose compiler (still on `1.0.0-alpha07` ) and everything works well

```composeOptions {
    kotlinCompilerVersion "1.4.10"
    kotlinCompilerExtensionVersion '1.0.0-alpha07'
}

dependencies {

    ...

    // Jetpack Compose libraries
    def compose_version = "1.0.0-alpha08"
    implementation "androidx.compose.ui:ui:$compose_version"
    // Tooling support (Previews, etc.)
    implementation 'androidx.ui:ui-tooling:1.0.0-alpha07'
    // Foundation (Border, Background, Box, Image, Scroll, shapes, animations, etc.)
    implementation "androidx.compose.foundation:foundation:$compose_version"
    // Material Design
    implementation "androidx.compose.material:material:$compose_version"
    // Material design icons
    implementation "androidx.compose.material:material-icons-core:$compose_version"
    implementation "androidx.compose.material:material-icons-extended:$compose_version"
    // Integration with observables
    implementation "androidx.compose.runtime:runtime-livedata:$compose_version"
    // Navigation for Compose
    implementation "androidx.navigation:navigation-compose:1.0.0-alpha03"
}```

<@U6158UG1Z>
• Android Studio cache invalidated
• Gradle processes stopped
• Gradle cache deleted
Problem resolved. Thanks for the feedback.

<@U01AJJV90NB> do you have  `kotlin 1.4.20` with `compose 1.0.0-alpha08` working?

Yes. I have never needed to fully delete my cache `.gradle/caches` before, but that seemed to do the trick.

now it working :party-parrot: , but in my case, only the Android Studio cache invalidated has solved the problem :muscle: , anyway thank you guys <@U01AJJV90NB> <@U6158UG1Z>