When I make a new compose multiplatform app using ...

# compose

[Douglas Ronne]

When I make a new compose multiplatform app using the wizard, and select desktop, I get the following error when I run the project:

Exception in thread "main" java.lang.NoClassDefFoundError: androidx/collection/ScatterMapKt
at androidx.compose.runtime.collection.ScopeMap.<init>(ScopeMap.kt:26)
at androidx.compose.runtime.CompositionImpl.<init>(Composition.kt:479)
at androidx.compose.runtime.CompositionImpl.<init>(Composition.kt:434)
at androidx.compose.runtime.CompositionKt.Composition(Composition.kt:335)
at androidx.compose.ui.window.Application_desktopKt$awaitApplication$2$1$2.invokeSuspend(Application.desktop.kt:217)
at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:108)
at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:318)
at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:773)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:720)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:714)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:400)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:87)
at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:742)
at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
Caused by: java.lang.ClassNotFoundException: androidx.collection.ScatterMapKt
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
... 20 more

so the desktop seems to depend on the androidx collections? Is this intentional or a bug?

[Zach Klippenstein (he/him) [MOD]]

Please keep long code snippets and stack traces to the thread to keep the main channel more readable.

[Zach Klippenstein (he/him) [MOD]]

ScatterMap is defined in common source, it’s just in a package named androidx. I’m guessing you have a version mismatch

[aidanvii]

I’m seeing the same. Oddly though if I package it with ./gradlew desktopApp:packageDistributionForCurrentOS , install and run, its fine 😕

[LarryL]

https://github.com/JetBrains/compose-multiplatform/issues/4666 Maybe this would solve the problem.