Program crash- unable to detect the issue

[newtoQ_s]

The following code is giving me an issue.

void MainWindow::onDelete()
{
 
        if(ui->tableWidget->selectionModel()->hasSelection()){
 
            QItemSelectionModel *selectionmodel =ui->tableWidget->selectionModel();
            QModelIndexList selected_items= selectionmodel->selectedRows();
            qSort(selected_items);
        }

void MainWindow::onDelete()
{

        if(ui->tableWidget->selectionModel()->hasSelection()){

            QItemSelectionModel *selectionmodel =ui->tableWidget->selectionModel();
            QModelIndexList selected_items= selectionmodel->selectedRows();
            qSort(selected_items);
        }

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Whenever I run it, the program crashes giving me an error:
Invalid address specified to RtlValidateHeap( 006A0000, 00F4DB90 )

It appears to be trying to delete a node from the code in qlist. I am unable to figure out the error. Any advice would be great.