[AC-918] IndexOutOfBoundsException in TiApplication.getCurrentActivity

I have no idea how this happened. Got this in the Developer Console's Crashes and ANRs from one of our testers. The only way this can happen is if reference was removed in a different thread while in the getCurrent loop. {quote} java.lang.RuntimeException: Unable to pause activity \{com.pingapp.app/org.appcelerator.titanium.TiActivity\}: java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0 at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3196) at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3151) at android.app.ActivityThread.handlePauseActivity(ActivityThread.java:3129) at android.app.ActivityThread.access$900(ActivityThread.java:159) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1333) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:176) at android.app.ActivityThread.main(ActivityThread.java:5419) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:525) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1046) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:862) at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0 at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255) at java.util.ArrayList.remove(ArrayList.java:403) at org.appcelerator.titanium.TiApplication.getCurrentActivity(TiApplication.java:297) at org.appcelerator.titanium.TiApplication.setCurrentActivity(TiApplication.java:569) at org.appcelerator.titanium.TiBaseActivity.onPause(TiBaseActivity.java:1060) at org.appcelerator.titanium.TiActivity.onPause(TiActivity.java:48) at android.app.Activity.performPause(Activity.java:5474) at android.app.Instrumentation.callActivityOnPause(Instrumentation.java:1250) at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3182) ... 12 more {quote}