I have this strange error that do not point to any...

# compose

[Piotr Prus]

I have this strange error that do not point to anything in my code and it crashes the app.
I have Bottom Navigation, where one fragment (start destination) is 100% done in compose. When I start the app everything works fine, but when I go to other fragment and go back to my main (compose), I got this crash. Anyone saw something like this before?

java.lang.NullPointerException: Attempt to invoke interface method 'void androidx.compose.runtime.MutableState.setValue(java.lang.Object)' on a null object reference
        at androidx.compose.ui.platform.AndroidComposeView.setLayoutDirection(AndroidComposeView.android.kt:930)
        at androidx.compose.ui.platform.AndroidComposeView.onRtlPropertiesChanged(AndroidComposeView.android.kt:768)
        at android.view.View.resolvePadding(View.java:20272)
        at android.view.ViewGroup.resolvePadding(ViewGroup.java:7765)
        at android.view.View.initializeScrollbarsInternal(View.java:6781)
        at android.view.View.<init>(View.java:6112)
        at android.view.ViewGroup.<init>(ViewGroup.java:697)
        at android.view.ViewGroup.<init>(ViewGroup.java:693)
        at android.view.ViewGroup.<init>(ViewGroup.java:689)
        at android.view.ViewGroup.<init>(ViewGroup.java:685)
        at androidx.compose.ui.platform.AndroidComposeView.<init>(AndroidComposeView.android.kt:115)
        at androidx.compose.ui.platform.Wrapper_androidKt.setContent(Wrapper.android.kt:79)
        at androidx.compose.ui.platform.AbstractComposeView.ensureCompositionCreated(ComposeView.android.kt:175)
        at androidx.compose.ui.platform.AbstractComposeView.onAttachedToWindow(ComposeView.android.kt:207)
        at android.view.View.dispatchAttachedToWindow(View.java:20479)
        at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:3489)
        at android.view.ViewGroup.addViewInner(ViewGroup.java:5278)
        at android.view.ViewGroup.addView(ViewGroup.java:5064)
        at androidx.fragment.app.FragmentContainerView.addView(FragmentContainerView.java:290)
        at android.view.ViewGroup.addView(ViewGroup.java:5004)
        at androidx.fragment.app.FragmentStateManager.addViewToContainer(FragmentStateManager.java:830)
        at androidx.fragment.app.FragmentStateManager.createView(FragmentStateManager.java:520)
        at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:282)
        at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:2177)
        at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:2094)
        at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:1990)
        at androidx.fragment.app.FragmentManager$5.run(FragmentManager.java:524)
        at android.os.Handler.handleCallback(Handler.java:938)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:223)
        at android.app.ActivityThread.main(ActivityThread.java:7660)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)

[Adam Powell]

https://issuetracker.google.com/issues/181463117

[Adam Powell]

tl;dr: should be fixed in beta02. In the meantime, look for any places in your app theme xml files that set scrollbar attributes globally to the theme and remove them

[Adam Powell]

those being present during inflation causes View to invoke non-final methods to update rtl properties in its constructor

[Piotr Prus]

Thanks. I thought it might be at the issuetracker. I was looking for “NPE”, etc. Great that it will be fixed soon. 🙂

[Piotr Prus]

setting

<item name="android:scrollbars">none</item>

globally, solved the issue 👌

[Adam Powell]

nice; considering that's the default though, I might also look to see what's turning it on the in first place 🙂

[Adam Powell]

that was never meant to be an attribute that appears at the theme level since it makes no sense; what does it mean to specify that toggle switches should have vertical scrollbars anyway? 🙃 whatever is setting that globally is a bug too since it's kind of nonsense

[Piotr Prus]

I have checked the codebase and there are 2 places with android:scrollbars and these are RVs. Nothing suspicious here. Maybe some library is setting it or another android view?

[Colton Idle]

@Piotr Prus do you by any chance use a library for a debug drawer? I'm having the same issue and the debug drawer is the only thing I could think of.

[Shivam Sethi]

Same issue, hope this will get fixed.

[Adam Powell]

beta02 releases this Wednesday if all goes as planned, or you can try the snapshot builds from androidx.dev to confirm the fix

[Shivam Sethi]

I will wait for the next build on Wednesday or when it comes, to get around with this I hosted another activity in the single activity app which I will translate back to fragment using fixed compose view

[Piotr Prus]

@Colton Idle I have this issue on quite big project, where many engineers used a lot libraries before i join. We are now trying to clean it, go 100% compose. I have no idea which library, out of million, can cause it 🙃