Hi to all!

I need help because I stumbled into pitfall I cannot solve. In my app module I have QTableView subclassed object which represents data from subclassed QStandardItemModel object. This QStandardItemModel subclassed object internally holds QList of some data. Now, when I empty this QList with clear() method and after I clear QTableView also using its inherited clear method with following code chunk:
Qt Code: 
  1. m_pShoppingCartView->order()->orders()->clear();    // reinits order list
  2.     m_pShoppingCartView->shoppingCartModel()->clear();    // clears table view
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my app crashes with gdb error:
Qt Code: 
  1. warning: ASSERT: "i >= 0 && i < size()" in file ../../include/QtCore/../../src/corelib/tools/qbitarray.h, line 121
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. The application crashes when I readd items to qlist and then render data of this qlist using model on table view. Why the app crashes?!