[Interest] Myanmar-QWERTY crashes OS X application
Viktor Engelmann
viktor.engelmann at qt.io
Tue Aug 23 10:18:43 CEST 2016
I wouldn't suggest using virtual machines as reference, because you
never know what problems might be solved (or caused) by the VM in the
background...
On 22.08.2016 21:30, Timothy W. Grove wrote:
>
> I don't think you are doing anything wrong; perhaps even doing
> something right! My development and testing has been on Mavericks
> where I am seeing the problems, but when I try the same things on El
> Capitan (in a Parallels Virtual Machine) there don't seem to be any
> issues. More testing is needed and I'll see if I have the same
> 'success' with my full PyQt application on El Capitan. Thanks for the
> reply.
>
> Best regards, Tim
>
>
> On 22/08/2016 09:14, Alexandru Croitor wrote:
>> Hi,
>>
>> I tried reproducing your issue, and wasn't successful, no crash happens.
>> I have OSX 10.11.5, Official Qt 5.7.0, only two languages installed,
>> British and Myanmar-QWERTY, and I'm using the auto-generated
>> Qt-Creator QMainWindow example.
>>
>> After launching the application, I try to switch the languages around
>> with hotkey, with clicking in the top-right language corner, and by
>> changing the language directly in System Preferences -> Keyboard ->
>> Input Sources.
>>
>> No crash is happening. What am I doing wrong?
>>
>> Regards, Alex.
>>
>>> On 19 Aug 2016, at 20:13, Timothy W. Grove <tim_grove at sil.org
>>> <mailto:tim_grove at sil.org>> wrote:
>>>
>>> Well, my first experiences working with QtCreator directly and I'm
>>> seeing the same issues. I guess that points to bugs in Qt itself and
>>> lets Phil Thompson at riverbankcomputing off of the hook! If not
>>> here, where should I report the problem? Sample program below
>>> followed by some error reports. The errors occur when switching back
>>> and forth between 'British' and 'Myanmar-QWERTY' in system
>>> preferences in OS X.
>>>
>>> Best regards,
>>> Timothy Grove
>>>
>>>
>>> *Test program:*
>>>
>>> #include "mainwindow.h"
>>> #include "ui_mainwindow.h"
>>>
>>> MainWindow::MainWindow(QWidget *parent) :
>>> QMainWindow(parent),
>>> ui(new Ui::MainWindow)
>>> {
>>> ui->setupUi(this);
>>> }
>>>
>>> MainWindow::~MainWindow()
>>> {
>>> delete ui;
>>> }
>>>
>>>
>>>
>>> *Errors reported in QtCreator console:*
>>>
>>> Starting /Users/timothy/QtProjects/build-SooSL-Desktop_Qt_5_7_0_clang_64bit-Debug/SooSL.app/Contents/MacOS/SooSL...
>>> 2016-08-19 18:42:39.108 SooSL[1354:507] -[NSHIObject length]: unrecognized selector sent to instance 0x7fe153d1d560
>>> 2016-08-19 18:42:39.108 SooSL[1354:507] -[NSHIObject length]: unrecognized selector sent to instance 0x7fe153d1d560
>>> 2016-08-19 18:42:39.110 SooSL[1354:507] (
>>> 0 CoreFoundation 0x00007fff879d225c __exceptionPreprocess + 172
>>> 1 libobjc.A.dylib 0x00007fff8d27de75 objc_exception_throw + 43
>>> 2 CoreFoundation 0x00007fff879d512d -[NSObject(NSObject) doesNotRecognizeSelector:] + 205
>>> 3 CoreFoundation 0x00007fff87930272 ___forwarding___ + 1010
>>> 4 CoreFoundation 0x00007fff8792fdf8 _CF_forwarding_prep_0 + 120
>>> 5 QtCore 0x000000010a2bb876 _ZN9QCFString9toQStringEPK10__CFString + 54
>>> 6 libqcocoa.dylib 0x000000010c741ac7 _ZN18QCocoaInputContext12updateLocaleEv + 87
>>> 7 CoreFoundation 0x00007fff879a0e0c __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 12
>>> 8 CoreFoundation 0x00007fff8789482d _CFXNotificationPost + 2893
>>> 9 Foundation 0x00007fff89f62e4a -[NSNotificationCenter postNotificationName:object:userInfo:] + 68
>>> 10 CoreFoundation 0x00007fff879a0e0c __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 12
>>> 11 CoreFoundation 0x00007fff87962f79 ____CFXNotificationPostToken_block_invoke + 137
>>> 12 CoreFoundation 0x00007fff8790348c __CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__ + 12
>>> 13 CoreFoundation 0x00007fff878f4ae5 __CFRunLoopDoBlocks + 341
>>> 14 CoreFoundation 0x00007fff878f486e __CFRunLoopRun + 1982
>>> 15 CoreFoundation 0x00007fff878f3e75 CFRunLoopRunSpecific + 309
>>> 16 HIToolbox 0x00007fff8aff3a0d RunCurrentEventLoopInMode + 226
>>> 17 HIToolbox 0x00007fff8aff37b7 ReceiveNextEventCommon + 479
>>> 18 HIToolbox 0x00007fff8aff35bc _BlockUntilNextEventMatchingListInModeWithFilter + 65
>>> 19 AppKit 0x00007fff9189d24e _DPSNextEvent + 1434
>>> 20 AppKit 0x00007fff9189c89b -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 122
>>> 21 AppKit 0x00007fff9189099c -[NSApplication run] + 553
>>> 22 libqcocoa.dylib 0x000000010c71c53f _ZN21QCocoaEventDispatcher13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE + 2191
>>> 23 QtCore 0x000000010a266eb1 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE + 401
>>> 24 QtCore 0x000000010a26b115 _ZN16QCoreApplication4execEv + 341
>>> 25 SooSL 0x00000001093eb12b main + 91
>>> 26 libdyld.dylib 0x00007fff8ea2c5fd start + 1
>>> )
>>> On 19/08/2016 16:48, timur.kristof at gmail.com wrote:
>>>> Can you create a simple example app without Python, to see if it really is Qt's fault?
>>>>
>>>> (Just create an app with Qt Creator and run it. As far as I understand, you use QWidgets, right? If so, create an empty QWitgets project, run and see how it goes.)
>>>>
>>>> On Fri Aug 19 13:33:58 2016 GMT+0200, Timothy W. Grove wrote:
>>>>> Changing the keyboard input source on OS X back and forth between
>>>>> 'British' and 'Myanmar-QWERTY' crashes my PyQt v5.7 application after
>>>>> about three changes, usually corrupting an attached sqlite database as
>>>>> well. 'Myanmar-QWERTY' is the only input source that I'm having trouble
>>>>> with; all others that I've tested so far appear okay. The windows
>>>>> version of the application also seems okay. My application is fairly
>>>>> complex, but I'm seeing this issue even with an absolute minimal app
>>>>> containing only one window. I'm not certain if the issue is with PyQt or
>>>>> Qt or the input source itself, but it doesn't appear to be with python
>>>>> as a Tkinter app worked okay.
>>>>>
>>>>> Any answers would be great, but if anyone could suggest where to find a
>>>>> solution that would also be helpful. This is a pretty obscure bug, but
>>>>> finding a solution or work-around is important to the application I'm
>>>>> developing. Thank you.
>>>>>
>>>>> Best regards,
>>>>> Timothy Grove
>>>>>
>>>>>
>>>>> Test program:
>>>>>
>>>>> #!/usr/bin/env python3
>>>>> # -*- coding: utf-8 -*-
>>>>>
>>>>> import sys
>>>>> from PyQt5.QtWidgets import QMainWindow
>>>>> from PyQt5.QtWidgets import QTextEdit
>>>>> from PyQt5.QtWidgets import QApplication
>>>>>
>>>>> class MainWindow(QMainWindow):
>>>>> def __init__(self, parent=None):
>>>>> super(MainWindow, self).__init__(parent)
>>>>>
>>>>> text = QTextEdit()
>>>>> self.setCentralWidget(text)
>>>>>
>>>>> if __name__ == "__main__":
>>>>> app = QApplication(sys.argv)
>>>>>
>>>>> mw = MainWindow()
>>>>> mw.show()
>>>>>
>>>>> sys.exit(app.exec_())
>>>>>
>>>>> _______________________________________________
>>>>> Interest mailing list
>>>>> Interest at qt-project.org
>>>>> http://lists.qt-project.org/mailman/listinfo/interest
>>>>>
>>>
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>>
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--
Viktor Engelmann
Software Engineer
The Qt Company GmbH
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Viktor.Engelmann at qt.io
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