Crash (NullPointerException) on opening ConversationCreationActivity / ConversationCreationScreen

[PetrNebukin]

Steps to reproduce

1. Open Nextcloud Talk Android app.
2. Tap on the button to create a new conversation / room.
3. App crashes immediately.

Expected behaviour

Opening the conversation creation activity

Actual behaviour

The app crashes with a NullPointerException when trying to open/render the conversation creation screen (ConversationCreationActivity). The crash occurs during the initial composition pass inside the Scaffold body content of ConversationCreationScreen.

Device brand and model

Pixel 6A

Android version

16

Nextcloud Talk app version

24.0.2

Nextcloud server version

34.0.3

Talk version

24.0.4

Custom TURN server configured

Yes

Custom STUN server configured

Yes

Android logs

Time: 1787202919546
msg: java.lang.NullPointerException
stacktrace: java.lang.NullPointerException
	at com.nextcloud.talk.conversationcreation.ConversationCreationActivityKt.ConversationCreationScreen$lambda$5(ConversationCreationActivity.kt:230)
	at com.nextcloud.talk.conversationcreation.ConversationCreationActivityKt$$ExternalSyntheticLambda29.invoke(D8$$SyntheticClass:0)
	at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.kt:131)
	at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.kt:52)
	at androidx.compose.material3.ScaffoldKt$ScaffoldLayout$bodyContent$1$1.invoke(Scaffold.kt:163)
	at androidx.compose.material3.ScaffoldKt$ScaffoldLayout$bodyContent$1$1.invoke(Scaffold.kt:163)
	at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.kt:122)
	at androidx.compose.runtime.internal.ComposableLambdaImpl.invoke(ComposableLambda.kt:52)
	at androidx.compose.runtime.internal.Expect_jvmKt.invokeComposable(Expect.jvmAndAndroid.kt:26)
	at androidx.compose.runtime.GapComposer.doCompose-aFTiNEg(GapComposer.kt:2643)
	at androidx.compose.runtime.GapComposer.composeContent--ZbOJvo$runtime(GapComposer.kt:2545)
	at androidx.compose.runtime.CompositionImpl.composeContent(Composition.kt:895)
	at androidx.compose.runtime.Recomposer.composeInitial$runtime(Recomposer.kt:1178)
	at androidx.compose.runtime.GapComposer$CompositionContextImpl.composeInitial$runtime(GapComposer.kt:2987)
	at androidx.compose.runtime.CompositionImpl.composeInitial(Composition.kt:732)
	at androidx.compose.runtime.CompositionImpl.setContent(Composition.kt:699)
	at androidx.compose.ui.layout.LayoutNodeSubcompositionsState.subcompose(SubcomposeLayout.kt:721)
	at androidx.compose.ui.layout.LayoutNodeSubcompositionsState.subcompose(SubcomposeLayout.kt:658)
	at androidx.compose.ui.layout.LayoutNodeSubcompositionsState.subcompose(SubcomposeLayout.kt:624)
	at androidx.compose.ui.layout.LayoutNodeSubcompositionsState$Scope.subcompose(SubcomposeLayout.kt:1353)
	at androidx.compose.material3.ScaffoldKt.ScaffoldLayout_FMILGgc$lambda$15$lambda$14(Scaffold.kt:274)
	at androidx.compose.material3.ScaffoldKt$$ExternalSyntheticLambda2.invoke(D8$$SyntheticClass:0)
	at androidx.compose.ui.layout.LayoutNodeSubcompositionsState$createMeasurePolicy$1.measure-3p2s80s(SubcomposeLayout.kt:955)
	at androidx.compose.ui.node.InnerNodeCoordinator.measure-BRTryo0(InnerNodeCoordinator.kt:130)
	at androidx.compose.ui.node.MeasurePassDelegate$performMeasureBlock$1.invoke(MeasurePassDelegate.kt:173)
	at androidx.compose.ui.node.MeasurePassDelegate$performMeasureBlock$1.invoke(MeasurePassDelegate.kt:172)
	at androidx.compose.runtime.snapshots.SnapshotStateObserver.observeReads(SnapshotStateObserver.kt:729)
	at androidx.compose.ui.node.MeasurePassDelegate.remeasure-BRTryo0(MeasurePassDelegate.kt:1077)
	at androidx.compose.ui.node.MeasurePassDelegate.measure-BRTryo0(MeasurePassDelegate.kt:470)
	at androidx.compose.foundation.layout.BoxMeasurePolicy.measure-3p2s80s(Box.kt:145)
	at androidx.compose.ui.node.InnerNodeCoordinator.measure-BRTryo0(InnerNodeCoordinator.kt:130)
	at androidx.compose.ui.graphics.SimpleGraphicsLayerModifier.measure-3p2s80s(GraphicsLayerModifier.kt:843)
	at androidx.compose.ui.node.LayoutModifierNodeCoordinator.measure-BRTryo0(LayoutModifierNodeCoordinator.kt:190)
	at androidx.compose.foundation.layout.InsetsPaddingModifierNode.measure-3p2s80s(WindowInsetsPadding.kt:506)
	at androidx.compose.ui.node.LayoutModifierNodeCoordinator.measure-BRTryo0(LayoutModifierNodeCoordinator.kt:190)
	at androidx.compose.foundation.layout.InsetsPaddingModifierNode.measure-3p2s80s(WindowInsetsPadding.kt:506)
	at androidx.compose.ui.node.LayoutModifierNodeCoordinator.measure-BRTryo0(LayoutModifierNodeCoordinator.kt:190)
	at androidx.compose.ui.node.MeasurePassDelegate$performMeasureBlock$1.invoke(MeasurePassDelegate.kt:173)
	at androidx.compose.ui.node.MeasurePassDelegate$performMeasureBlock$1.invoke(MeasurePassDelegate.kt:172)
	at androidx.compose.runtime.snapshots.SnapshotStateObserver.observeReads(SnapshotStateObserver.kt:729)
	at androidx.compose.ui.node.MeasurePassDelegate.remeasure-BRTryo0(MeasurePassDelegate.kt:1077)
	at androidx.compose.ui.node.MeasurePassDelegate.measure-BRTryo0(MeasurePassDelegate.kt:470)
	at androidx.compose.ui.layout.RootMeasurePolicy.measure-3p2s80s(RootMeasurePolicy.kt:50)
	at androidx.compose.ui.node.InnerNodeCoordinator.measure-BRTryo0(InnerNodeCoordinator.kt:130)
	at androidx.compose.ui.platform.AndroidComposeView$RootModifierNode.measure-3p2s80s(AndroidComposeView.android.kt:3595)
	at androidx.compose.ui.node.LayoutModifierNodeCoordinator.measure-BRTryo0(LayoutModifierNodeCoordinator.kt:190)
	at androidx.compose.ui.node.MeasurePassDelegate$performMeasureBlock$1.invoke(MeasurePassDelegate.kt:173)
	at androidx.compose.ui.node.MeasurePassDelegate$performMeasureBlock$1.invoke(MeasurePassDelegate.kt:172)
	at androidx.compose.runtime.snapshots.SnapshotStateObserver.observeReads(SnapshotStateObserver.kt:758)
	at androidx.compose.ui.node.MeasurePassDelegate.remeasure-BRTryo0(MeasurePassDelegate.kt:1077)
	at androidx.compose.ui.node.LayoutNode.remeasure-_Sx5XlM$ui(LayoutNode.kt:1290)
	at androidx.compose.ui.node.MeasureAndLayoutDelegate.doRemeasure-sdFAvZA(MeasureAndLayoutDelegate.kt:381)
	at androidx.compose.ui.node.MeasureAndLayoutDelegate.remeasureOnly(MeasureAndLayoutDelegate.kt:723)
	at androidx.compose.ui.node.MeasureAndLayoutDelegate.measureOnly(MeasureAndLayoutDelegate.kt:460)
	at androidx.compose.ui.platform.AndroidComposeView.onMeasure(AndroidComposeView.android.kt:1973)
	at android.view.View.measure(View.java:28595)
	at androidx.compose.ui.platform.AbstractComposeView.internalOnMeasure$ui(ComposeView.android.kt:489)
	at androidx.compose.ui.platform.AbstractComposeView.onMeasure(ComposeView.android.kt:476)
	at android.view.View.measure(View.java:28595)
	at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:7039)
	at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
	at androidx.appcompat.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:141)
	at android.view.View.measure(View.java:28595)
	at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:7039)
	at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1608)
	at android.widget.LinearLayout.measureVertical(LinearLayout.java:878)
	at android.widget.LinearLayout.onMeasure(LinearLayout.java:721)
	at android.view.View.measure(View.java:28595)
	at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:7039)
	at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
	at android.view.View.measure(View.java:28595)
	at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:7039)
	at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1608)
	at android.widget.LinearLayout.measureVertical(LinearLayout.java:878)
	at android.widget.LinearLayout.onMeasure(LinearLayout.java:721)
	at android.view.View.measure(View.java:28595)
	at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:7039)
	at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
	at com.android.internal.policy.DecorView.onMeasure(DecorView.java:758)
	at android.view.View.measure(View.java:28595)
	at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:5096)
	at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:3444)
	at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:3757)
	at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:3135)
	at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:10821)
	at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1632)
	at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1641)
	at android.view.Choreographer.doCallbacks(Choreographer.java:1237)
	at android.view.Choreographer.doFrame(Choreographer.java:1166)
	at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:1615)
	at android.os.Handler.handleCallback(Handler.java:1070)
	at android.os.Handler.dispatchMessage(Handler.java:125)
	at android.os.Looper.dispatchMessage(Looper.java:333)
	at android.os.Looper.loopOnce(Looper.java:263)
	at android.os.Looper.loop(Looper.java:367)
	at android.app.ActivityThread.main(ActivityThread.java:9314)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:569)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:929)

[mahibi]

thanks for reporting! Will fix it soon

[mahibi]

quickfix is #6518
Root cause with capabilities being null must be solved in a greater fix (occurs in other places as well)