[Interest] PySide2 5.14.2 signal/slots changed

[Jérôme Godbout]

Just a follow up, the bug have been changed to P1 critical and reproduced and on some other use case too. Just heads up, if anybody is using pyside, you might want to hold before going to 5.14.2 until this get fix. https://bugreports.qt.io/browse/PYSIDE-1255


From: Jérôme Godbout <godboutj at amotus.ca>
Sent: April 1, 2020 11:58 AM
To: Jérôme Godbout <godboutj at amotus.ca>; interest at qt-project.org
Subject: RE: PySide2 5.14.2 signal/slots changed

A more complete example. also narrow the bug, if the parent is set to self before launching the object the signal no more reach it, work under 5.14.0, 5.14.1 but not on 5.14.2. This is a show stopper for 5.14.2. I have open an issue:
https://bugreports.qt.io/browse/PYSIDE-1255


From: Interest <interest-bounces at qt-project.org<mailto:interest-bounces at qt-project.org>> On Behalf Of Jérôme Godbout
Sent: April 1, 2020 11:21 AM
To: interest at qt-project.org<mailto:interest at qt-project.org>
Subject: [Interest] PySide2 5.14.2 signal/slots changed

Hi,
I was trying the signal/slots for a Python application, but with the new version I discovered that the signal is no more reaching my Qml anymore, reverting to 5.14.0 PySide2 fix the problem.

Python code:

from PySide2.QtCore import QObject, Signal

class BObj(QObject):
                ...

class AObj(QObject):
dataReceived = Signal(BObj)

                def myFct(self):
                                toto = BObj(self)
                                print("before", flush=True) # print before and after on both version of PySide2 5.14.0 and 5.14.2
                                self.dataReceived.emit(toto)
                                print("after", flush=True)

Qml Code:

AObj
{
                onDataReceived:
                {
                  console.log("Reach Qml"); // This print with PySide 5.14.0 but not in 5.14.2
                var b_obj = arguments[0]; // no named arguments from python, weird syntax lead to this
                }
}

Is there any changes or this was not allowed??? or this is a bug into 5.14.2? (I could reproduce on Linxu and Windows. Is the signals syntax changes or something?

Jerome
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