I've found what appears to be a memory leak in the 4.5-tp1 release and
looks like it is still in recent snapshots. This is the Carbon build
of Qt.
In qwidget_mac.mm, in QWidgetPrivate::update_sys(const QRegion &rgn),
it calls:
HIViewSetNeedsDisplayInRegion(qt_mac_nativeview_for(q),
rgn.handle(true), true);
rgn.handle(true) calls QRegion::toQDRgn() in qregion_mac.cpp.
QRegion::toQDRgn() allocates memory on the heap with the Carbon API
NewRgn() and returns that RgnHandle.
It doesn't appear that QRegion keeps track of a Carbon RgnHandle
internally to clean up when the QRegion goes away, and obviously the
code in qwidget_mac doesn't keep track of and clean up the RgnHandle.
If I have a flash animation playing, for example, this happens
constantly and I leak about 100KB/minute.
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