首先很感謝 duck 兄一直的努力，時至今日仍開心使用中，亦祝君安好。
近日發現資料庫更新後，卻不時出現 crash 訊息，故特此回報，盼有助查察原因。
再次衷心感謝 HeaDuck 裨益眾生???

動作：
1. 開啟 HeaDuck 程式介面
2. 按一下更新資料庫
3. 見到下載進度，直至完成
4. 之後出現 Android 指程式停止運作的訊息

Logcat 摘錄： (infinite loop??)
FATAL EXCEPTION: IntentService[UserDbService]
Process: com.headuck.headuckblocker.dev, PID: 8837
java.lang.StackOverflowError: stack size 1037KB
at ap.a.a(Unknown Source:77)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)
at ap.a.a(Unknown Source:86)