Re: [Pyobjc-dev] autorelease pool page corrupted

[Jake W. <del...@gm...>]

Sorry, for the screenshot of the system error dialog, I included in this
post:
http://stackoverflow.com/questions/19520078/wxpython-with-pyobjc-autorelease-pool-page-corrupted


On Thu, Oct 24, 2013 at 9:52 PM, Jake Wang <del...@gm...> wrote:

> Hi Ronald,
>
> Thanks for your response! You reply only arrived once, so no worries :)
>
> I've arranged a small app to reproduce this issue. Please see the source
> code from this link: https://github.com/jiakuan/wx-sample
>
> *New findings*
>
> While preparing the small app, I found that the issue might be related to
> two event binds together with a multiple-thread environment:
>
>     app.Bind(wx.EVT_QUERY_END_SESSION, OnUnexpectedExit)
>     app.Bind(wx.EVT_END_SESSION, OnUnexpectedExit)
>
> *Sample project description*
>
> Test 1: From the sample project, please run *test_wx_and_event_1.py*, you
> will see a taskbar icon. When you click the taskbar icon and select "Close
> wxPython Sample", the app quit correctly without any issues.
>
> Test 2: From the sample project, please run *test_wx_and_event_2.py*, you
> will also see a taskbar icon. When you click the taskbar icon and select
> "Close wxPython Sample", the app quit with a system dialog as the same as
> the one I attached in my previous post, and an error message will be
> printed in console like the following:
>
> objc[9303]: autorelease pool page 0x103889000 corrupted
>   magic 0x1038a800 0x70000000 0x1039c000 0x50000000
>   pthread 0x7fff79c40180
>
> If we comment two lines (line 145 and 146) in test_wx_and_event_2.py
>
>       # self.Bind(wx.EVT_QUERY_END_SESSION, self.OnUnexpectedExit)
>       # self.Bind(wx.EVT_END_SESSION, self.OnUnexpectedExit)
>
> then no such error when quitting app from the taskbar menu.
>
> The only difference between test_wx_and_event_1.py
> and test_wx_and_event_2.py is that the second one used a new thread to
> maintain an event queue.
>
> And the issue in test 2 only happened in wxPython 2.9.5.0, no such issues
> for wxPython 2.9.4.0.
>
> Really appreciate your help on this issue.
>
> Thanks,
> Jake
>
>
>
> On Thu, Oct 24, 2013 at 7:55 PM, Ronald Oussoren <ron...@ma...>wrote:
>
>>
>> On 22 Oct, 2013, at 15:49, Jake Wang <del...@gm...> wrote:
>>
>> > Hi,
>> >
>> > I used PyObjc in a python application for monitoring some global events:
>> >
>> > class MacOSXEventMonitor():
>> >     def init(self):
>> >         log.debug("Initializing events monitor for Mac OS X...")
>> >
>> >         self._observer =
>> NSEvent.addGlobalMonitorForEventsMatchingMask_handler_(
>> >             NSLeftMouseDownMask
>> >             | NSLeftMouseUpMask
>> >             | NSRightMouseDownMask
>> >             | NSRightMouseUpMask
>> >             | NSMouseMovedMask
>> >             | NSLeftMouseDraggedMask
>> >             | NSRightMouseDraggedMask
>> >             | NSMouseEnteredMask
>> >             | NSMouseExitedMask
>> >             | NSScrollWheelMask
>> >             | NSKeyDownMask
>> >             | NSKeyUpMask
>> >             | NSAlphaShiftKeyMask
>> >             | NSShiftKeyMask
>> >             | NSControlKeyMask
>> >             | NSAlternateKeyMask
>> >             | NSCommandKeyMask
>> >             | NSNumericPadKeyMask
>> >             | NSHelpKeyMask
>> >             | NSFunctionKeyMask
>> >             | NSFlagsChangedMask, self.handleEvent)
>> >
>> >     def handleEvent(self, event):
>> >         # NSLog(u"%@", event)
>> >
>> >     def stop(self):
>> >         NSEvent.removeMonitor_(self._observer)
>> >
>> > It is strange that each time when I exit the application, the following
>> error printed in console:
>> >
>> > objc[8775]: autorelease pool page 0x1009e0000 corrupted
>> >   magic 0x1009ff00 0xc0000000 0x00000000 0x60000000
>> >   pthread 0x7fff7e917180
>> >
>> > Also a system dialog shown (please see the screenshot attached).
>> >
>> > Anyone encountered this before? Much appreciate for any
>> suggestions/help.
>>
>> (I'm sorry if this arrives twice, I just noticed that an earlier attempt
>> at replying seems to be dropped to the floor by mail.app...)
>>
>> Do you have a self-contained program that demonstrates the problem? I can
>> get callbacks to handleEvent by embedding the code above
>> in a small app, but the app doesn't crash in the way you mention.
>>
>> Ronald
>>
>> >
>> > Thanks,
>> > Jake
>> >
>> >
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>>
>