Program crash when programmatically deleting a QTabWidget tab that is being dragged

When user programmatically deletes a tab that is being dragged at highest index, program crashes from:

ASSERT failure in QList<T>::operator[]: "index out of range", file ..\..\include
/QtCore/../../src/corelib/tools/qlist.h, line 539

Notice that crash does not happen if the dragged tab is not at the highest index position when delete is called.

Steps to reproduce:

• Run the attached sample
• Start dragging any tab of the TabWidget
• Drag the tab to rightmost position (highest index)
• (If the dragged tab already was at rightmost position, it doesn't have to change index to reproduce the bug, as long as it's just being dragged)
• While dragging the tab, press control + F4 shortcut (Linux: F4) to delete the given tab
• Program crashes