CardTemplateFragment: TabLayoutMediator attached before ViewPager2 has an adapter

[david-allison]

https://ankidroid.org/acra/app/1/bug/253711/report/ca45f20a-280b-48c8-b27c-31c240c5c3ec

java.lang.IllegalStateException: TabLayoutMediator attached before ViewPager2 has an adapter
	at com.google.android.material.tabs.TabLayoutMediator.attach(TabLayoutMediator.java:117)
	at com.ichi2.anki.CardTemplateEditor$CardTemplateFragment.initTabLayoutMediator(CardTemplateEditor.kt:678)
	at com.ichi2.anki.CardTemplateEditor$CardTemplateFragment.onViewCreated(CardTemplateEditor.kt:652)
	at androidx.fragment.app.Fragment.performViewCreated(Fragment.java:3152)
	at androidx.fragment.app.FragmentStateManager.createView(FragmentStateManager.java:608)
	at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:286)
	at androidx.fragment.app.FragmentStore.moveToExpectedState(FragmentStore.java:114)
	at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1684)
	at androidx.fragment.app.FragmentManager.dispatchStateChange(FragmentManager.java:3316)
	at androidx.fragment.app.FragmentManager.dispatchActivityCreated(FragmentManager.java:3234)
	at androidx.fragment.app.FragmentController.dispatchActivityCreated(FragmentController.java:263)
	at androidx.fragment.app.FragmentActivity.onStart(FragmentActivity.java:350)
	at androidx.appcompat.app.AppCompatActivity.onStart(AppCompatActivity.java:251)
	at com.ichi2.anki.AnkiActivity.onStart(AnkiActivity.kt:128)
	at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1432)
	at android.app.Activity.performStart(Activity.java:8003)
	at android.app.ActivityThread.handleStartActivity(ActivityThread.java:3556)
	at android.app.servertransaction.TransactionExecutor.performLifecycleSequence(TransactionExecutor.java:226)
	at android.app.servertransaction.TransactionExecutor.cycleToPath(TransactionExecutor.java:206)
	at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:178)
	at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:102)
	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2230)
	at android.os.Handler.dispatchMessage(Handler.java:107)
	at android.os.Looper.loop(Looper.java:237)
	at android.app.ActivityThread.main(ActivityThread.java:7817)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1027)

[david-allison]

@SanjaySargam FYI