[PyQt] Eric4 issue with splitted views

Tue Mar 25 17:22:20 GMT 2014

Hi Hans-Peter,

Does this only happen when you SPLIT the view or when you create a new view without a new 
split as well? If so it might be a QScintilla issue because when a new view is created both views 
are accessing the *same* document, i.e. the very same instance.

Regards,
Detlev

On Monday 24 March 2014, 15:01:34 Hans-Peter Jansen wrote:
> Dear Phil,
> 
> I suffer from a long term Eric 4 problem, where eric crashes consistently on
> exit, when I split just one view.
> 
> Prerequisites:
> Running on KDE4 with PyQt4 available
> Using tabbed view in Viewmanager
> 
> Reproduce:
> Just running eric with a single file argument, right click into editor,
> choose "New view (with new split)" and exit reproduces this for me.
> 
> Results in:
> Thread 1 (Thread 0x7fc162564700 (LWP 4712)):
> [KCrash Handler]
> #6  0x00007fc15d707aca in QWidgetPrivate::deleteTLSysExtra
> (this=this at entry=0x44e45f0) at kernel/qwidget_x11.cpp:2885 #7 
> 0x00007fc15d6bea85 in QWidgetPrivate::deleteExtra
> (this=this at entry=0x44e45f0) at kernel/qwidget.cpp:1832 #8 
> 0x00007fc15d6becad in QWidgetPrivate::~QWidgetPrivate (this=0x44e45f0,
> __in_chrg=<optimized out>) at kernel/qwidget.cpp:365 #9  0x00007fc15daa8e75
> in ~QMenuPrivate (this=0x44e45f0, __in_chrg=<optimized out>) at
> widgets/qmenu_p.h:171 #10 QMenuPrivate::~QMenuPrivate (this=0x44e45f0,
> __in_chrg=<optimized out>) at widgets/qmenu_p.h:183 #11 0x00007fc15fc68c35
> in cleanup (pointer=<optimized out>) at
> ../../src/corelib/tools/qscopedpointer.h:62 #12 ~QScopedPointer
> (this=0x44e4588, __in_chrg=<optimized out>) at
> ../../src/corelib/tools/qscopedpointer.h:100 #13 QObject::~QObject
> (this=0x44e4580, __in_chrg=<optimized out>) at kernel/qobject.cpp:816 #14
> 0x00007fc15d6c76ac in QWidget::~QWidget (this=0x44e4580,
> __in_chrg=<optimized out>) at kernel/qwidget.cpp:1554 #15
> 0x00007fc15e5bd989 in sipQMenu::~sipQMenu (this=0x44e4580,
> __in_chrg=<optimized out>) at sipQtGuiQMenu.cpp:316 #16 0x00007fc15e5bd9fe
> in release_QMenu (sipCppV=0x44e4580) at sipQtGuiQMenu.cpp:2785 #17
> 0x00007fc1604ba476 in forgetObject (sw=sw at entry=0x422c2b0) at
> siplib.c:10891 #18 0x00007fc1604bb599 in sipWrapper_dealloc
> (self=0x422c2b0) at siplib.c:10443 #19 0x00007fc16209aefa in
> subtype_dealloc (self=0x422c2b0) at Objects/typeobject.c:1030 #20
> 0x00007fc1620937e0 in dict_dealloc (mp=0x44f9d50) at
> Objects/dictobject.c:1010 #21 0x00007fc1620937b9 in dict_dealloc
> (mp=0x3d30f20) at Objects/dictobject.c:1010 #22 0x00007fc1604b86a7 in
> sipSimpleWrapper_clear (self=self at entry=0x3c11b00) at siplib.c:10016 #23
> 0x00007fc1604bb4c4 in sipWrapper_clear (self=0x3c11b00) at siplib.c:10402
> #24 0x00007fc16207b232 in delete_garbage (old=0x7fc162370260
> <generations+96>, collectable=0x7fff271e2780) at Modules/gcmodule.c:820 #25
> collect (generation=2) at Modules/gcmodule.c:984
> #26 0x00007fc16207b710 in PyGC_Collect () at Modules/gcmodule.c:1440
> #27 0x00007fc1620727b9 in Py_Finalize () at Python/pythonrun.c:449
> #28 0x00007fc162072255 in Py_Exit (sts=0) at Python/pythonrun.c:1777
> #29 0x00007fc1620723a4 in handle_system_exit () at Python/pythonrun.c:1151
> #30 0x00007fc1620723d1 in PyErr_PrintEx
> (set_sys_last_vars=set_sys_last_vars at entry=1) at Python/pythonrun.c:1161
> #31 0x00007fc162072691 in PyErr_Print () at Python/pythonrun.c:1064 #32
> 0x00007fc162072bf9 in PyRun_SimpleFileExFlags (fp=fp at entry=0x83e4e0,
> filename=<optimized out>, filename at entry=0x7fff271e4f42
> "/usr/lib64/python2.7/site-packages/eric4/eric4.py",
> closeit=closeit at entry=1, flags=flags at entry=0x7fff271e29e0) at
> Python/pythonrun.c:952 #33 0x00007fc16207312c in PyRun_AnyFileExFlags
> (fp=fp at entry=0x83e4e0, filename=filename at entry=0x7fff271e4f42
> "/usr/lib64/python2.7/site-packages/eric4/eric4.py",
> closeit=closeit at entry=1, flags=flags at entry=0x7fff271e29e0) at
> Python/pythonrun.c:752 #34 0x00007fc16207a81e in Py_Main (argc=<optimized
> out>, argv=0x7fff271e2b98) at Modules/main.c:640 #35 0x00007fc161a31be5 in
> __libc_start_main () from /lib64/libc.so.6 #36 0x0000000000400791 in _start
> ()
> 
> 
> As you can see, this crash is a typical case of "dtor called" after python
> exited. Of course, there isn't much, you can do about this. You even provide
> sip.setdestroyonexit() for such issues. But that's exactly my problem here.
> 
> With this patch applied, shouldn't such an issue not happen anymore:
> 
> --- eric4.py.orig       2014-01-07 07:46:19.000000000 +0100
> +++ eric4.py    2014-03-24 10:07:04.223139840 +0100
> @@ -17,6 +17,7 @@ import traceback
>  import cStringIO
>  import time
>  import logging
> +import sip
> 
>  from PyQt4.QtCore import QTextCodec, SIGNAL, SLOT, qWarning, \
>      QLibraryInfo, QTimer
> @@ -162,7 +163,12 @@ def main():
>      global args, mainWindow, splash, restartArgs
> 
>      sys.excepthook = excepthook
> -
> +
> +    try:
> +        sip.setdestroyonexit(True)
> +    except AttributeError:
> +        pass
> +
>      options = [\
>          ("--config=configDir",
>           "use the given directory as the one containing the config files"),
> 
> 
> I checked it also without exception handling, just in case, but problem
> persists. Since I always use splitted views, and don't want to miss eric's
> KDE integration, I would like to see this fixed.
> 
> I've checked eric's source for suspect operations during the split, but
> couldn't spot any fishy operations. (ViewManager/ViewManager.py,
> Plugins/ViewManagerPlugins/Tabview/Tabview.py).
> 
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