src/bitmessageqt/__init__.py

@@ -3976,6 +3976,7 @@ class MyForm(settingsmixin.SMainWindow):
     def tableWidgetBlacklistItemChanged(self, item):
         if item.column() == 0:
             addressitem = self.ui.tableWidgetBlacklist.item(item.row(), 1)
+            if isinstance(addressitem, QTableWidgetItem):
                 if self.ui.radioButtonBlacklist.isChecked():
                     sqlExecute('''UPDATE blacklist SET label=? WHERE address=?''',
                             str(item.text()), str(addressitem.text()))