qxmlquery memory leak

[jaxrpc]

Hi all,

i am using xquery to retrieve xml data in Qt with QXmlQuery but i realised that there are some memory leak with QXmlQuery. It looks like it failed to release some the memory it has allocated. I need to run xquery against a xml pretty frequent so the leak can get quite bad.

Anyone else facing the leaking problem? What are the available open source libraries for xquery?

thanks

[borisbn]

Can you show a code, please ( just a fragment, that that makes memory leak ). I'm using QXmlQuery and I don't want to have this problem in my program.
Thanks

[jaxrpc]

do a simple setquery call multiple times in a loop and you can see it

[borisbn]

I wrote a simple example, run it and monitored memory by windows task manager. Then I remarked this code and view memory usage again, and I don't see any changes. I use Windows 7 + Qt 4.6.2 + MXVC2008. Here is my code.

QByteArray byteArray = "<?xml version='1.0' encoding='Windows-1251'?>"
                           "<widget>"
                               "<property name='text'>Текст</property>"
                           "</widget>";
    for ( int i = 0; i < 1000000; i++ )
    {
        QBuffer buffer( &byteArray );
        buffer.open( QIODevice::ReadOnly );
        QXmlQuery xmlQuery;
        xmlQuery.bindVariable( "myDocument", &buffer );
        xmlQuery.setQuery("string(doc($myDocument)/widget/property[@name='text'])");
        bool v = xmlQuery.isValid();
        QString sss;
        bool eee = xmlQuery.evaluateTo( &sss );
        buffer.close();
    }

QByteArray byteArray = "<?xml version='1.0' encoding='Windows-1251'?>"
                           "<widget>"
                               "<property name='text'>Текст</property>"
                           "</widget>";
    for ( int i = 0; i < 1000000; i++ )
    {
        QBuffer buffer( &byteArray );
        buffer.open( QIODevice::ReadOnly );
        QXmlQuery xmlQuery;
        xmlQuery.bindVariable( "myDocument", &buffer );
        xmlQuery.setQuery("string(doc($myDocument)/widget/property[@name='text'])");
        bool v = xmlQuery.isValid();
        QString sss;
        bool eee = xmlQuery.evaluateTo( &sss );
        buffer.close();
    }

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[jaxrpc]

hi i am on fedora,

memory increases fast , 1 thing to note is that my xml is huge...300 elements.
I detected the leak using valgrind and monitor it using top command

i will try to post my code snippet.