[Assigned] Crash at Session Detail screen upon activity state loss

[mkano9]

Overview (Required)

Steps to reproduce:

• Navigate to any Session Detail screen.
• Put the app in background by tapping on device home button.
• Perform a bunch of other actions to put the device in low memory situation to trigger state loss.
• Open the app when you think you did enough.
• Crash.

Stacktrace: 01-30 21:54:37.382 7569-7569/io.github.droidkaigi.confsched2018.debug E/AndroidRuntime: FATAL EXCEPTION: main Process: io.github.droidkaigi.confsched2018.debug, PID: 7569 java.lang.IllegalArgumentException: Parameter specified as non-null is null: method kotlin.jvm.internal.Intrinsics.checkParameterIsNotNull, parameter speakers at io.github.droidkaigi.confsched2018.presentation.common.view.SpeakersSummaryLayout.setSpeakers(SpeakersSummaryLayout.kt) at io.github.droidkaigi.confsched2018.databinding.FragmentSessionDetailBinding.executeBindings(FragmentSessionDetailBinding.java:386) at android.databinding.ViewDataBinding.executeBindingsInternal(ViewDataBinding.java:379) at android.databinding.ViewDataBinding.executePendingBindings(ViewDataBinding.java:351) at android.databinding.ViewDataBinding$6.run(ViewDataBinding.java:178) at android.databinding.ViewDataBinding$5.onViewAttachedToWindow(ViewDataBinding.java:146) at android.view.View.dispatchAttachedToWindow(View.java:15520) at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2916) at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2923) at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2923) at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2923) at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2923) at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2923) at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2923) at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2923) at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2923) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1526) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1254) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6337) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:874) at android.view.Choreographer.doCallbacks(Choreographer.java:686) at android.view.Choreographer.doFrame(Choreographer.java:621) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:860) at android.os.Handler.handleCallback(Handler.java:751) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6119) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)

[takahirom]

Thanks 👍 I was able to reproduce the crash by enabling the "Do not keep activities" option on it

[takahirom]

Probably We can use nullable for setSpeakers() parameter. And early return speakers ?: return

[panpanini]

Can I have a look at this issue? 🙋

[takahirom]

@panpanini Thanks :+1: