[PyQt] Segfault in QMenu.addAction when parent widget is deleted.

[Yuya Nishihara]

On Sat, 5 Apr 2014 12:26:38 -0700, J Robert Ray wrote:
> I suppose the implied solution is to create the
> submenu via python and add it to the parent menu. We've restructured our
> code to avoid this situation.

or connect async RPC result to widget's slot.

> > On 02-04-2014 9:11 pm, J Robert Ray wrote:
> >> In boils down to trying to add a new action to a submenu of a menu
> >> attached to a widget that has been deleted. Were having this problem
> >> due to some asynchronous RPC and getting results back after a user has
> >> caused the widget to go away.

    class Widget(QWidget):
        @pyqtSlot()
        def cb(self):
            self.sub.addAction(...)

    # will be disconnected if widget is deleted
    rpcservice.resultReady.connect(widget.cb)

instead of

    def cb():
        sub.addAction(...)

    # "sub" may be deleted but "cb" won't
    rpcservice.resultReady.connect(cb)

Regards,