Conference-app-2020: [Crash report] Lateinit property `textLayout` is not initialized at FilterChip#onDraw L291

[KeithYokoma]

Overview (Required)

• Crash on resuming session list screen, caused by accessing lateinit property textLayout without initialization in FilterChip.
  
  
  
  • textLayout is initialized at onMeasure procedure.
  
  
  • seems like there's a path to call onDraw without initializing textLayout.
  
  

Steps To Reproduce

It's not consistently reproducible but I have observed the issue several times with these steps.

1. Launch conference app
2. Lock the device
3. Unlock after some time

Expected behavior
Resume session list screen without a crash.

Env:

• Device: Pixel 4 XL
• OS: Android 10
• App Version: DeployGate #130 / 1.0.5 (1000500)

[KeithYokoma]

Stacktrace:

io.github.droidkaigi.confsched2020.ui.widget.FilterChip.onDraw (FilterChip.java:291)
android.view.View.draw (View.java:21975)
android.view.View.updateDisplayListIfDirty (View.java:20852)
android.view.View.draw (View.java:21707)
android.view.ViewGroup.drawChild (ViewGroup.java:4432)
android.view.ViewGroup.dispatchDraw (ViewGroup.java:4193)
android.view.View.updateDisplayListIfDirty (View.java:20843)
android.view.ViewGroup.recreateChildDisplayList (ViewGroup.java:4416)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:4389)
android.view.View.updateDisplayListIfDirty (View.java:20812)
android.view.ViewGroup.recreateChildDisplayList (ViewGroup.java:4416)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:4389)
android.view.View.updateDisplayListIfDirty (View.java:20812)
android.view.ViewGroup.recreateChildDisplayList (ViewGroup.java:4416)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:4389)
android.view.View.updateDisplayListIfDirty (View.java:20812)
android.view.ViewGroup.recreateChildDisplayList (ViewGroup.java:4416)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:4389)
android.view.View.updateDisplayListIfDirty (View.java:20812)
android.view.ViewGroup.recreateChildDisplayList (ViewGroup.java:4416)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:4389)
android.view.View.updateDisplayListIfDirty (View.java:20812)
android.view.ViewGroup.recreateChildDisplayList (ViewGroup.java:4416)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:4389)
android.view.View.updateDisplayListIfDirty (View.java:20812)
android.view.ViewGroup.recreateChildDisplayList (ViewGroup.java:4416)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:4389)
android.view.View.updateDisplayListIfDirty (View.java:20812)
android.view.ViewGroup.recreateChildDisplayList (ViewGroup.java:4416)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:4389)
android.view.View.updateDisplayListIfDirty (View.java:20812)
android.view.ViewGroup.recreateChildDisplayList (ViewGroup.java:4416)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:4389)
android.view.View.updateDisplayListIfDirty (View.java:20812)
android.view.ViewGroup.recreateChildDisplayList (ViewGroup.java:4416)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:4389)
android.view.View.updateDisplayListIfDirty (View.java:20812)
android.view.ViewGroup.recreateChildDisplayList (ViewGroup.java:4416)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:4389)
android.view.View.updateDisplayListIfDirty (View.java:20812)
android.view.ViewGroup.recreateChildDisplayList (ViewGroup.java:4416)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:4389)
android.view.View.updateDisplayListIfDirty (View.java:20812)
android.view.ViewGroup.recreateChildDisplayList (ViewGroup.java:4416)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:4389)
android.view.View.updateDisplayListIfDirty (View.java:20812)
android.view.ViewGroup.recreateChildDisplayList (ViewGroup.java:4416)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:4389)
android.view.View.updateDisplayListIfDirty (View.java:20812)
android.view.ViewGroup.recreateChildDisplayList (ViewGroup.java:4416)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:4389)
android.view.View.updateDisplayListIfDirty (View.java:20812)
android.view.ViewGroup.recreateChildDisplayList (ViewGroup.java:4416)
android.view.ViewGroup.dispatchGetDisplayList (ViewGroup.java:4389)
android.view.View.updateDisplayListIfDirty (View.java:20812)
android.view.ThreadedRenderer.updateViewTreeDisplayList (ThreadedRenderer.java:581)
android.view.ThreadedRenderer.updateRootDisplayList (ThreadedRenderer.java:587)
android.view.ThreadedRenderer.draw (ThreadedRenderer.java:664)
android.view.ViewRootImpl.draw (ViewRootImpl.java:3767)
android.view.ViewRootImpl.performDraw (ViewRootImpl.java:3495)
android.view.ViewRootImpl.performTraversals (ViewRootImpl.java:2779)
android.view.ViewRootImpl.doTraversal (ViewRootImpl.java:1745)
android.view.ViewRootImpl$TraversalRunnable.run (ViewRootImpl.java:7768)
android.view.Choreographer$CallbackRecord.run (Choreographer.java:967)
android.view.Choreographer.doCallbacks (Choreographer.java:791)
android.view.Choreographer.doFrame (Choreographer.java:726)
android.view.Choreographer$FrameDisplayEventReceiver.run (Choreographer.java:952)
android.os.Handler.handleCallback (Handler.java:883)
android.os.Handler.dispatchMessage (Handler.java:100)
android.os.Looper.loop (Looper.java:214)
android.app.ActivityThread.main (ActivityThread.java:7356)
java.lang.reflect.Method.invoke (Method.java)
com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:492)
com.android.internal.os.ZygoteInit.main (ZygoteInit.java:930)

[koji-1009]

Can I try?

I can't reproduce this problem in my environment yet.
However, I feel this problem can be fixed by removing the "unstable" lateinit call. 🕵

[roana0229]

Of course, assigned 👍

[koji-1009]

Sorry, I can't reproduce this issue in the latest conference app. (DroidKaigi 2020 #227)
And I can not found the DeployGate link DroidKaigi 2020 #130...

@KeithYokoma
Hi, can you reproduce this issue in the latest conference app?

[koji-1009]

@roana0229
Sorry, I give up. I can't reproduce this issue.

---

Maybe, we can avoid this issue to change lateinit property to nullable property.
https://github.com/DroidKaigi/conference-app-2020/blob/master/corecomponent/androidcomponent/src/main/java/io/github/droidkaigi/confsched2020/ui/widget/FilterChip.kt#L146

However, this workaround is not good because the root cause cannot be fix.
To investigate this issue I want reproduce, but I can't do.

So, I give up now. Sorry 🙏

[roana0229]

No need to apologize 😄
Thank you for your dedicated investigation. 👍