QStandardItemModel and match function - exception in Qt code

[LynneV]

I have a QStandardItemModel that I am using in a QTreeView. It has several levels, and I want to allow the user to expand/contract a specific level. Some of the levels are siblings, I want to allow the user to expand one sibling, but not another. I store the 'name' of the level in Qt::UserRole+1. When the QTreeView displays, a QComboBox with the names gets populated, along with defaults of Expand All and Expand None. I have a signal/slot triggered by changing the Expand Level in the combo box. Expand All and Expand None work fine. I am using the code below:

void RWPreview::changeExpand( QString level )
{   
    QModelIndexList idx_list;
    if( level.compare( "All") == 0 )
        rpt_view-> expandAll();
 
    else if( level.compare("None") == 0 )
        rpt_view-> collapseAll();
 
    else
    {
        QModelIndex st_idx = ((QStandardItemModel*)rpt_view->model() )->index(0,0);
        idx_list = rpt_view->model()->match(st_idx, Qt::UserRole+1, qVariantFromValue(level), -1, Qt::MatchRecursive );
        QListIterator<QModelIndex> i( idx_list );
        while (i.hasNext())
          rpt_view->expand( i.next() );
 
    }  
 
}

void RWPreview::changeExpand( QString level )
{   
    QModelIndexList idx_list;
    if( level.compare( "All") == 0 )
        rpt_view-> expandAll();

    else if( level.compare("None") == 0 )
        rpt_view-> collapseAll();

    else
    {
        QModelIndex st_idx = ((QStandardItemModel*)rpt_view->model() )->index(0,0);
        idx_list = rpt_view->model()->match(st_idx, Qt::UserRole+1, qVariantFromValue(level), -1, Qt::MatchRecursive );
        QListIterator<QModelIndex> i( idx_list );
        while (i.hasNext())
          rpt_view->expand( i.next() );
    
    }  
    
}

To copy to clipboard, switch view to plain text mode 

I get the expected number of model indexes for the expected rows in the QModelIndexList. It completes the while loop, and exits the if statement. However, when it exits the function, I get an exception. Does anyone have an idea what I can try? If I dont' create the QModelIndexList, it works fine (but obviously, doesn't expand nodes). I'm puzzled!

[LynneV]

I stumbled across the "answer" to this issue. According to http://www.qtcentre.org/threads/27769 , this is caused by linking to release libraries rather than debug libraries when in debug mode. You can see more information at http://bugreports.qt.nokia.com/browse/QTBUG-7884.

However, in my project, I'm explicitly linking to debug libraries for the debug build (and release libraries for the release build). I'm using 4.6.2. Can anyone give me hints of what to look for????