[PyKDE] Segfault in QGraphicsScene.drawItems
arve.knudsen at gmail.com
Fri Feb 23 19:04:36 GMT 2007
On 2/23/07, Michael Guntsche <mike at it-loops.com> wrote:
> On Feb 23, 2007, at 17:51, Arve Knudsen wrote:
> > Hello
> > If I try to reimplement the method drawItems in a QGraphicsScene
> > subclass, the program segfaults. Is this a bug in PyQt? I am by the
> > way using PyQt 4.1.1 (self-compiled) and Qt 4.2.0 (Ubuntu). I've
> > included a sample program which exhibits the behaviour.
> Works here.
> QT 4.2.2 and the latest Pyqt snapshot.
Very strange ... I've now installed the latest snapshot, and the problem
persists. This time on a Gentoo installation with Qt 4.2.2. Inspecting the
generated Python bindings, sipQtGuiQGraphicsScene.cpp, it seems to me there
is a bug in meth_QGraphicsScene_drawItems. Argument 3, an array of
QGraphicsItem*, is actually treated as a return value from the corresponding
C++ function and thus uninitialized before being passed to Qt. As such I
wonder how come it doesn't crash on your machine, maybe the memory error is
If you print out the arguments to drawItems in Python you'll find that
instead of a list of QGraphicItems you'll receive an int instead (the number
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