Exception/crash in the "Loopy" patch (going back past the beginning of a taplist with a separate bang)

[chr15m]

W/dalvikvm(21860): threadid=1: thread exiting with uncaught exception (group=0x40b07300) E/AndroidRuntime(21860): FATAL EXCEPTION: main E/AndroidRuntime(21860): java.lang.ArrayIndexOutOfBoundsException: length=27; index=-2 E/AndroidRuntime(21860): at java.util.ArrayList.get(ArrayList.java:306) E/AndroidRuntime(21860): at cx.mccormick.pddroidparty.Taplist.doSend(Taplist.java:89) E/AndroidRuntime(21860): at cx.mccormick.pddroidparty.Taplist.receiveFloat(Taplist.java:121) E/AndroidRuntime(21860): at cx.mccormick.pddroidparty.DroidPartyReceiver$1.receiveFloat(DroidPartyReceiver.java:54) E/AndroidRuntime(21860): at org.puredata.core.utils.PdDispatcher.receiveFloat(PdDispatcher.java:107) E/AndroidRuntime(21860): at org.puredata.core.PdBase.pollPdMessageQueue(Native Method) E/AndroidRuntime(21860): at org.puredata.android.io.PdAudio$1.run(PdAudio.java:34) E/AndroidRuntime(21860): at android.os.Handler.handleCallback(Handler.java:615) E/AndroidRuntime(21860): at android.os.Handler.dispatchMessage(Handler.java:92) E/AndroidRuntime(21860): at android.os.Looper.loop(Looper.java:137) E/AndroidRuntime(21860): at android.app.ActivityThread.main(ActivityThread.java:4746) E/AndroidRuntime(21860): at java.lang.reflect.Method.invokeNative(Native Method) E/AndroidRuntime(21860): at java.lang.reflect.Method.invoke(Method.java:511) E/AndroidRuntime(21860): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:917) E/AndroidRuntime(21860): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:684) E/AndroidRuntime(21860): at dalvik.system.NativeStart.main(Native Method) W/ActivityManager( 1218): Force finishing activity cx.mccormick.pddroidparty/.PdDroidParty