KotlinNullPointerException in queryServerProperties()

[mueller-ma]

Fatal Exception: kotlin.KotlinNullPointerException
       at org.openhab.habdroid.ui.MainActivity.queryServerProperties(MainActivity.kt:511)
       at org.openhab.habdroid.ui.MainActivity.retryServerPropertyQuery(MainActivity.kt:486)
       at org.openhab.habdroid.ui.activity.ContentController$CommunicationFailureFragment.onClick(ContentController.kt:516)
       at android.view.View.performClick(View.java:7352)
       at android.widget.TextView.performClick(TextView.java:14177)
       at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:967)
       at android.view.View.performClickInternal(View.java:7318)
       at android.view.View.access$3200(View.java:846)
       at android.view.View$PerformClick.run(View.java:27800)
       at android.os.Handler.handleCallback(Handler.java:873)
       at android.os.Handler.dispatchMessage(Handler.java:99)
       at android.os.Looper.loop(Looper.java:214)
       at android.app.ActivityThread.main(ActivityThread.java:7050)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:494)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:965)

For some reason the CommunicationFailureFragment isn't replaced by a NoNetworkFragment when the connection is lost.

Environment data

Client

• Android version: Multiple
• Device model: Multiple
• App version : 2.11.11-beta
• Build flavor : Full

[mueller-ma]

Is it possible that the connection is set to null in onAvailableConnectionChanged() and at the same time the user clicks on the retry button, but before onAvailableConnectionChanged() replaces the fragment? Maybe propsUpdateHandle should be canceled in onAvailableConnectionChanged() and the cast Connection? to Connection should be moved to fetchFlags().