Background crash while Chromecast is connected

[Terrance]

Describe the bug

Not consistently reproducible, but I've been alerted of this on more than one occasion.

1. Connect to Chromecast
2. Put app in background
3. Leave it for a bit
   • App crashes in the background, Chromecast disconnects (sooner than the usual idle timeout)

Logs

FATAL EXCEPTION: main
Process: org.jellyfin.mobile, PID: 11428
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.app.Activity.runOnUiThread(java.lang.Runnable)' on a null object reference
        at org.jellyfin.mobile.player.cast.ChromecastSession.setSession(SourceFile:10)
        at org.jellyfin.mobile.player.cast.ChromecastConnection$6$1.onSessionEnded(SourceFile:3)
        at org.jellyfin.mobile.player.cast.ChromecastConnection$6$1.onSessionEnded(SourceFile:1)
        at M3.C.q(SourceFile:234)
        at com.google.android.gms.internal.cast.q.onTransact(SourceFile:51)
        at android.os.Binder.transact(Binder.java:1188)
        at m.qi.c(:com.google.android.gms.dynamite_dynamitemodulesc@[email protected] (190400-0):8)
        at m.xd.f(:com.google.android.gms.dynamite_dynamitemodulesc@[email protected] (190400-0):12)
        at m.xo.i(:com.google.android.gms.dynamite_dynamitemodulesc@[email protected] (190400-0):79)
        at m.wz.z(:com.google.android.gms.dynamite_dynamitemodulesc@[email protected] (190400-0):81)
        at m.qj.onTransact(:com.google.android.gms.dynamite_dynamitemodulesc@[email protected] (190400-0):21)
        at android.os.Binder.transact(Binder.java:1188)
        at com.google.android.gms.internal.cast.a.l0(SourceFile:8)
        at M3.h.c(SourceFile:17)
        at M3.I.onApplicationDisconnected(SourceFile:6)
        at L3.H.run(SourceFile:98)
        at android.os.Handler.handleCallback(Handler.java:942)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loopOnce(Looper.java:240)
        at android.os.Looper.loop(Looper.java:351)
        at android.app.ActivityThread.main(ActivityThread.java:8377)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:584)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1013)

Application version

2.6.2

Where did you install the app from?

F-Droid

Device information

OnePlus Nord CE

Android version

Android 13

Jellyfin server version

10.10.5

Which video player implementations does this bug apply to?

• Web player (default)
• Integrated player (ExoPlayer)
• External player (VLC, mpv, MX Player)