Blank UI then crash

[ffolkes]

Not really a major issue, but I ran into this a while ago and have been meaning to post it here. As I recall, I had used Synapse, used a bunch of other apps, then came back to Synapse. At that point Synapse had tabs, but was otherwise totally blank - no elements anywhere. Pressing Back resulted in:

E/AndroidRuntime(29605): FATAL EXCEPTION: main
E/AndroidRuntime(29605): Process: com.af.synapse, PID: 29605
E/AndroidRuntime(29605): java.lang.NullPointerException
E/AndroidRuntime(29605):    at com.af.synapse.MainActivity$ViewPagerPageChangeListener.onPageSelected(MainActivity.java:324)
E/AndroidRuntime(29605):    at android.support.v4.view.ViewPager.scrollToItem(ViewPager.java:567)
E/AndroidRuntime(29605):    at android.support.v4.view.ViewPager.setCurrentItemInternal(ViewPager.java:551)
E/AndroidRuntime(29605):    at android.support.v4.view.ViewPager.setCurrentItemInternal(ViewPager.java:509)
E/AndroidRuntime(29605):    at android.support.v4.view.ViewPager.setCurrentItem(ViewPager.java:501)
E/AndroidRuntime(29605):    at com.af.synapse.MainActivity$DrawerItemClickListener.onItemClick(MainActivity.java:310)
E/AndroidRuntime(29605):    at android.widget.AdapterView.performItemClick(AdapterView.java:298)
E/AndroidRuntime(29605):    at android.widget.AbsListView.performItemClick(AbsListView.java:1113)
E/AndroidRuntime(29605):    at android.widget.AbsListView$PerformClick.run(AbsListView.java:2911)
E/AndroidRuntime(29605):    at android.widget.AbsListView$3.run(AbsListView.java:3645)
E/AndroidRuntime(29605):    at android.os.Handler.handleCallback(Handler.java:733)
E/AndroidRuntime(29605):    at android.os.Handler.dispatchMessage(Handler.java:95)
E/AndroidRuntime(29605):    at android.os.Looper.loop(Looper.java:136)
E/AndroidRuntime(29605):    at android.app.ActivityThread.main(ActivityThread.java:5139)
E/AndroidRuntime(29605):    at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime(29605):    at java.lang.reflect.Method.invoke(Method.java:515)
E/AndroidRuntime(29605):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
E/AndroidRuntime(29605):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:611)
E/AndroidRuntime(29605):    at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:132)
E/AndroidRuntime(29605):    at dalvik.system.NativeStart.main(Native Method)
W/ActivityManager( 3924):   Force finishing activity com.af.synapse/.MainActivity