2020-09-01 20:13:55.189 29064-29064/com.example.composeexmples E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.composeexmples, PID: 29064
    java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:503)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
     Caused by: java.lang.reflect.InvocationTargetException
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858) 
     Caused by: java.lang.reflect.InvocationTargetException
        at java.lang.reflect.Method.invoke(Native Method)
        at androidx.compose.ui.platform.ViewLayer$Companion.updateDisplayList(ViewLayer.kt:259)
        at androidx.compose.ui.platform.ViewLayer.updateDisplayList(ViewLayer.kt:207)
        at androidx.compose.ui.platform.AndroidComposeView.dispatchDraw(AndroidComposeView.kt:474)
        at android.view.View.draw(View.java:20210)
        at android.view.View.updateDisplayListIfDirty(View.java:19082)
        at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4317)
        at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4290)
        at android.view.View.updateDisplayListIfDirty(View.java:19042)
        at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4317)
        at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4290)
        at android.view.View.updateDisplayListIfDirty(View.java:19042)
        at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4317)
        at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4290)
        at android.view.View.updateDisplayListIfDirty(View.java:19042)
        at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4317)
        at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4290)
        at android.view.View.updateDisplayListIfDirty(View.java:19042)
        at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:4317)
        at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:4290)
        at android.view.View.updateDisplayListIfDirty(View.java:19042)
        at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:686)
        at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:692)
        at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:801)
        at android.view.ViewRootImpl.draw(ViewRootImpl.java:3311)
        at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:3115)
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2484)
        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1460)
        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7183)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:949)
        at android.view.Choreographer.doCallbacks(Choreographer.java:761)
        at android.view.Choreographer.doFrame(Choreographer.java:696)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:935)
        at android.os.Handler.handleCallback(Handler.java:873)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:193)
        at android.app.ActivityThread.main(ActivityThread.java:6669)
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858) 
     Caused by: java.lang.IllegalArgumentException: LayoutNode@09c1800 children: 0 measureBlocks: androidx.compose.ui.LayoutKt$measureBlocksOf$1@670b714 is not ready. layoutState is NeedsRelayout
        at androidx.compose.ui.node.InnerPlaceable.draw(InnerPlaceable.kt:132)
        at androidx.compose.ui.node.ModifiedLayoutNode.draw(ModifiedLayoutNode.kt:81)
        at androidx.compose.ui.node.LayerWrapper$layer$1.invoke(Unknown Source:10)
        at androidx.compose.ui.node.LayerWrapper$layer$1.invoke(Unknown Source:3)
        at androidx.compose.ui.platform.ViewLayer$dispatchDraw$1$1.invoke(ViewLayer.kt:179)
        at androidx.compose.ui.platform.ViewLayer$dispatchDraw$1$1.invoke(Unknown Source:0)
        at androidx.compose.runtime.snapshots.Snapshot$Companion.observe(Snapshot.kt:1668)
        at androidx.compose.runtime.snapshots.SnapshotStateObserver.observeReads(SnapshotStateObserver.kt:127)
2020-09-01 20:13:55.189 29064-29064/com.example.composeexmples E/AndroidRuntime:     at androidx.compose.ui.platform.AndroidComposeView.observeLayerModelReads(AndroidComposeView.kt:429)
        at androidx.compose.ui.platform.ViewLayer.dispatchDraw(ViewLayer.kt:178)
        at android.view.View.draw(View.java:20210)
        at android.view.View.updateDisplayListIfDirty(View.java:19082)
        	... 40 more