Crash on clearing a list based model.

The attached qml script provides a testcase for the mentioned crash. When using a list, property of a ListModel item, as a submodel, the clear() method on such submodel causes a SEGFAULT. Though removing items one by one does work fine.

Testcase:

• Click on window
• Click on created item
• Crash
  Program received signal SIGSEGV, Segmentation fault.
  0x00007ffff62bfc56 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib64/qt4/libQtCore.so.4
  (gdb) bt
  #0 0x00007ffff62bfc56 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) ()
  from /usr/lib64/qt4/libQtCore.so.4
  #1 0x00007ffff7b102ef in QListModelInterface::itemsRemoved(int, int) () from /usr/lib64/qt4/libQtDeclarative.so.4
  #2 0x00007ffff796ec1c in QDeclarativeListModel::clear() () from /usr/lib64/qt4/libQtDeclarative.so.4
  #3 0x00007ffff7b0ef90 in QDeclarativeListModel::qt_metacall(QMetaObject::Call, int, void**) ()
  from /usr/lib64/qt4/libQtDeclarative.so.4

Expected results:
The list should be cleared with no problems.