Crash in QTreeWidgetItem::sortChildren when adding new item.

When appending new item to QTreeWidgetItem the application crashes to QTreeWidgetItem::sortChildren function (test application attached). The crash occurs in qitemselectionmodel.cpp indexesFromRange(const QItemSelectionRange &range, QModelIndexList &result) function. When debugging the issue it gives a following warning by operating system when it crashes:

Signal received
The inferior stopped because it received a signal from the Operating System.
Signal name: SIGSEGV
Signal meaning: Segmentation fault

Workaround fix for this is to call setSortingEnabled(true) every time when inserting a new item. In Qt documentation there is a note about this and it says that serSortingEnabled can help you to avoid performance issues. But it shouldn't crash when leaving sorting to false.