[PyQt] PyQt5.4 stuck on QtQuick.Dialogs

[Phil Thompson]

On 27/01/2015 12:14 am, Fabien Castan wrote:
> Hi,
> I still have the problem with the latest snapshot
> "PyQt-gpl-5.4.1-snapshot-55f521ae431b".
> 
> #0  pthread_cond_wait@@GLIBC_2.3.2 () at
> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
> #1  0x00007ffff01f9b03 in QWaitCondition::wait(QMutex*, unsigned long) 
> ()
> from /opt/Qt5.4/5.4/gcc_64/lib/libQt5Core.so.5
> #2  0x00007fffec5cc7c2 in ?? () from
> /opt/Qt5.4/5.4/gcc_64/lib/libQt5Qml.so.5
> #3  0x00007fffec570134 in ?? () from
> /opt/Qt5.4/5.4/gcc_64/lib/libQt5Qml.so.5
> #4  0x00007fffec570590 in ?? () from
> /opt/Qt5.4/5.4/gcc_64/lib/libQt5Qml.so.5
> #5  0x00007fffec5536dd in QQmlComponentPrivate::loadUrl(QUrl const&,
> QQmlComponent::CompilationMode) () from
> /opt/Qt5.4/5.4/gcc_64/lib/libQt5Qml.so.5
> #6  0x00007fffe93f5ecf in meth_QQmlComponent_loadUrl () from
> /home/fab/Téléchargements/ButtleOFX_Alpha_Linux64_v2.0/py3.3_env/lib/python3.3/site-packages/PyQt5/QtQml.so
> 
> Regards,
> Fabien

Then I need a complete, small example that demonstrates the problem.

Phil

> 2015-01-03 11:23 GMT+01:00 Phil Thompson <phil at riverbankcomputing.com>:
> 
>> On 02/01/2015 11:29 pm, Fabien Castan wrote:
>> 
>>> Hi,
>>> 
>>> I have installed Qt5.4 and compiled PyQt5.4 (with python3.4).
>>> But I'm stuck when loading a QML file which uses QtQuick.Dialogs.
>>> 
>>> Here is a simple QML example:
>>> 
>>> ```
>>> 
>>> import QtQuick 2.0
>>> 
>>> import QtQuick.Controls 1.0
>>> 
>>> import QtQuick.Dialogs 1.2 // works fine if you comment this line
>>> 
>>> 
>>> ApplicationWindow {
>>> 
>>> 
>>>     id: root
>>> 
>>>     title:"Title"
>>> 
>>> 
>>>     width: 1200
>>> 
>>>     height: 800
>>> 
>>> }
>>> 
>>> ```
>>> 
>>> 
>>> This QML file is loaded without trouble using "qmlscene".
>>> When I load it from PyQt it remains blocked...
>>> If I run python3 inside gdb, and kill the process, I get this 
>>> backtrace:
>>> 
>>> (gdb) bt
>>> #0  pthread_cond_wait@@GLIBC_2.3.2 () at
>>> ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
>>> 
>> 
>> Most likely to be the GIL not being released when it should causing a
>> deadlock. Hopefully fixed in tonight's snapshot.
>> 
>> Thanks,
>> Phil
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