This happened to me when I clicked on an app link for a new app which
was already in the repo, but I had not ran an index update yet since the
app got built. Stack trace prior to the fix follows.
java.lang.RuntimeException: Unable to destroy activity {org.fdroid.fdroid/org.fdroid.fdroid.AppDetails}: java.lang.NullPointerException:
Attempt to invoke virtual method 'void android.support.v4.content.LocalBroadcastManager.unregisterReceiver(android.content.BroadcastReceiver)' on a null
object reference
at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:3865)
at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:3883)
at android.app.ActivityThread.-wrap5(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1417)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5461)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void
android.support.v4.content.LocalBroadcastManager.unregisterReceiver(android.content.BroadcastReceiver)' on a null object reference
at org.fdroid.fdroid.AppDetails.unregisterDownloaderReceivers(AppDetails.java:469)
at org.fdroid.fdroid.AppDetails.onDestroy(AppDetails.java:569)
at android.app.Activity.performDestroy(Activity.java:6422)
at android.app.Instrumentation.callActivityOnDestroy(Instrumentation.java:1143)
at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:3852)
... 9 more
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