java.lang.IllegalArgumentException: the name must not be empty: null

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java.lang.IllegalArgumentException: the name must not be empty: null
at android.accounts.Account.(Account.java:48)
at com.android.calendar.calendarlist.CalendarListUtils.processCursor(CalendarListUtils.java:155)
at com.android.calendar.calendarlist.SelectCalendarsAdapter.swapCursor(SelectCalendarsAdapter.java:160)
at com.android.calendar.calendarlist.DrawerFragment.onLoadFinished(DrawerFragment.java:244)
at com.android.calendar.calendarlist.DrawerFragment.onLoadFinished(DrawerFragment.java:55)
at android.app.LoaderManagerImpl$LoaderInfo.callOnLoadFinished(LoaderManager.java:483)
at android.app.LoaderManagerImpl$LoaderInfo.onLoadComplete(LoaderManager.java:451)
at android.content.Loader.deliverResult(Loader.java:144)
at android.content.CursorLoader.deliverResult(CursorLoader.java:109)
at android.content.CursorLoader.deliverResult(CursorLoader.java:97)
at android.content.AsyncTaskLoader.dispatchOnLoadComplete(AsyncTaskLoader.java:265)
at android.content.AsyncTaskLoader$LoadTask.onPostExecute(AsyncTaskLoader.java:92)
at android.os.AsyncTask.finish(AsyncTask.java:651)

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