Comment 133 for bug 1502556

(In reply to painless roaster from comment #119)
> valgrind detect memor leak (from 15minutes run) here:
>
> ==13702== 56,137,960 bytes in 32,858 blocks are definitely lost in loss
> record 62,663 of 62,663
> ==13702== at 0x4C28C50: malloc (in
> /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
> ==13702== by 0x7496DFA:
> QSGBatchRenderer::Renderer::map(QSGBatchRenderer::Buffer*, int, bool) (in
> /usr/lib64/libQt5Quick.so.5.5.1)
> ==13702== by 0x7499074:
> QSGBatchRenderer::Renderer::uploadBatch(QSGBatchRenderer::Batch*) (in
> /usr/lib64/libQt5Quick.so.5.5.1)
> ==13702== by 0x74A4375: QSGBatchRenderer::Renderer::render() (in
> /usr/lib64/libQt5Quick.so.5.5.1)
> ==13702== by 0x74B00AE: QSGRenderer::renderScene(QSGBindable const&) (in
> /usr/lib64/libQt5Quick.so.5.5.1)
> ==13702== by 0x74B08FA: QSGRenderer::renderScene(unsigned int) (in
> /usr/lib64/libQt5Quick.so.5.5.1)
> ==13702== by 0x74C0DDD: QSGRenderContext::renderNextFrame(QSGRenderer*,
> unsigned int) (in /usr/lib64/libQt5Quick.so.5.5.1)
> ==13702== by 0x750ADCA: QQuickWindowPrivate::renderSceneGraph(QSize
> const&) (in /usr/lib64/libQt5Quick.so.5.5.1)
> ==13702== by 0x74DB78A: ??? (in /usr/lib64/libQt5Quick.so.5.5.1)
> ==13702== by 0x74DC890: ??? (in /usr/lib64/libQt5Quick.so.5.5.1)
> ==13702== by 0xA9D041B: QApplicationPrivate::notify_helper(QObject*,
> QEvent*) (in /usr/lib64/libQt5Widgets.so.5.5.1)
> ==13702== by 0xA9D58E5: QApplication::notify(QObject*, QEvent*) (in
> /usr/lib64/libQt5Widgets.so.5.5.1)

probably fixed in qt-5.5.2 nad qt-5.6.0
https://bugreports.qt.io/browse/QTBUG-48799