Ошибка при выполнении doInBackground() в Android

USER_COMMENT=None ANDROID_VERSION=4.1.2 APP_VERSION_NAME=3.1.3.1 BRAND=Nokia PHONE_MODEL=Nokia_X CUSTOM_DATA= STACK_TRACE=: An error occured while executing doInBackground() at android.os.AsyncTask$3.done(AsyncTask.java:299) at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273) at java.util.concurrent.FutureTask.setException(FutureTask.java:124) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307) at java.util.concurrent.FutureTask.run(FutureTask.java:137) at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569) at java.lang.Thread.run(Thread.java:856) Caused by: java.lang.StringIndexOutOfBoundsException: length=9; regionStart=0; regionLength=-1 at java.lang.String.startEndAndLength(String.java:593) at java.lang.String.substring(String.java:1474) at ru.flirchi.android.b.a(Unknown Source) at ru.flirchi.android.e.d.a(Unknown Source) at ru.flirchi.android.e.d.a(Unknown Source) at ru.flirchi.android.e.d.doInBackground(Unknown Source) at android.os.AsyncTask$2.call(AsyncTask.java:287) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305) ... 5 more java.lang.StringIndexOutOfBoundsException: length=9; regionStart=0; regionLength=-1 at java.lang.String.startEndAndLength(String.java:593) at java.lang.String.substring(String.java:1474) at ru.flirchi.android.b.a(Unknown Source) at ru.flirchi.android.e.d.a(Unknown Source) at ru.flirchi.android.e.d.a(Unknown Source) at ru.flirchi.android.e.d.doInBackground(Unknown Source) at android.os.AsyncTask$2.call(AsyncTask.java:287) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305) at java.util.concurrent.FutureTask.run(FutureTask.java:137) at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569) at java.lang.Thread.run(Thread.java:856)