I'm using my classes & objects which inherit QTreeWidgetItem, and it crashes when I try to do remove an item in this way:

Qt Code: 
  1. ui->treeWidget->currentItem()->parent()->removeChild(ui->treeWidget->currentItem());
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While this way succeeded:

Qt Code: 
  1. ui->treeWidget->invisibleRootItem()->removeChild(ui->treeWidget->currentItem());
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But this can only remove top level items, and it still crashed when I try to remove the last one in treeWidget. What's more, in another project QTreeWidget::clear() made it crash, too... and I don't understand the documentation of this slot.

So, why it crashed, and how to delete an item from a QTreeWidget? Thanx!