Bug 185708

Created attachment 31683 [details]
backtrace

Pasting the backtrace inline:

Anwendung: Kate (kate), Signal SIGSEGV
Using host libthread_db library "/lib/i686/cmov/libthread_db.so.1".

Thread 1 (Thread 0xb5d626c0 (LWP 9065)):
[KCrash Handler]
#6  0xb749d872 in QMenu::findIdForAction (this=0x8323f60, act=0x814e9f8) at /home/kde-devel/kdesvn/qt-copy/src/gui/widgets/qmenu.cpp:3152
#7  0xb749f04d in QMenuPrivate::activateCausedStack (this=0x8318100, causedStack=@0xbfbb63c8, action=0x814e9f8, action_e=QAction::Trigger, self=true)
    at /home/kde-devel/kdesvn/qt-copy/src/gui/widgets/qmenu.cpp:960
#8  0xb74a5711 in QMenuPrivate::activateAction (this=0x8318100, action=0x814e9f8, action_e=QAction::Trigger, self=<value optimized out>)
    at /home/kde-devel/kdesvn/qt-copy/src/gui/widgets/qmenu.cpp:1053
#9  0xb74a6492 in QMenu::mouseReleaseEvent (this=0x8329020, e=0xbfbb6aac) at /home/kde-devel/kdesvn/qt-copy/src/gui/widgets/qmenu.cpp:2247
#10 0xb7b92f95 in KMenu::mouseReleaseEvent (this=0x8329020, e=0xbfbb6aac) at /home/kde-devel/kdesvn/kdelibs/kdeui/widgets/kmenu.cpp:454
#11 0xb70df8ea in QWidget::event (this=0x8329020, event=0xbfbb6aac) at /home/kde-devel/kdesvn/qt-copy/src/gui/kernel/qwidget.cpp:7511
#12 0xb74a6f09 in QMenu::event (this=0x8329020, e=0xbfbb6aac) at /home/kde-devel/kdesvn/qt-copy/src/gui/widgets/qmenu.cpp:2346
#13 0xb708c34c in QApplicationPrivate::notify_helper (this=0x80539d0, receiver=0x8329020, e=0xbfbb6aac) at /home/kde-devel/kdesvn/qt-copy/src/gui/kernel/qapplication.cpp:4051
#14 0xb7094716 in QApplication::notify (this=0xbfbb73e8, receiver=0x8329020, e=0xbfbb6aac) at /home/kde-devel/kdesvn/qt-copy/src/gui/kernel/qapplication.cpp:3753
#15 0xb7aad35d in KApplication::notify (this=0xbfbb73e8, receiver=0x8329020, event=0xbfbb6aac) at /home/kde-devel/kdesvn/kdelibs/kdeui/kernel/kapplication.cpp:307
#16 0xb6c1a5ab in QCoreApplication::notifyInternal (this=0xbfbb73e8, receiver=0x8329020, event=0xbfbb6aac) at /home/kde-devel/kdesvn/qt-copy/src/corelib/kernel/qcoreapplication.cpp:593
#17 0xb7095b9e in QApplicationPrivate::sendMouseEvent (receiver=0x8329020, event=0xbfbb6aac, alienWidget=0x0, nativeWidget=0x8329020, buttonDown=0xb77886c0, lastMouseReceiver=@0xb77886c4)
    at ../../include/QtCore/../../../../qt-copy/src/corelib/kernel/qcoreapplication.h:211
#18 0xb70f6af5 in QETWidget::translateMouseEvent (this=0x8329020, event=0xbfbb6ffc) at /home/kde-devel/kdesvn/qt-copy/src/gui/kernel/qapplication_x11.cpp:4348
#19 0xb70f5964 in QApplication::x11ProcessEvent (this=0xbfbb73e8, event=0xbfbb6ffc) at /home/kde-devel/kdesvn/qt-copy/src/gui/kernel/qapplication_x11.cpp:3532
#20 0xb711c84a in x11EventSourceDispatch (s=0x8056840, callback=0, user_data=0x0) at /home/kde-devel/kdesvn/qt-copy/src/gui/kernel/qguieventdispatcher_glib.cpp:141
#21 0xb602d1b8 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#22 0xb6030853 in ?? () from /usr/lib/libglib-2.0.so.0
#23 0x08055ad0 in ?? ()
#24 0x00000000 in ?? ()

i have this bug but not only in kate, with klipper too ( kde 4.2.1 and Qt4.5 )

Crissi, what version of Qt are you using?


Here's my valgrind report with KDE 4.2.1 and Qt4.5

==16151== Invalid read of size 4                                                
==16151==    at 0x4F0A9FA: QMenuPrivate::q_func() (qmenu_p.h:126)               
==16151==    by 0x4F01C7A:
QMenuPrivate::activateCausedStack(QList<QPointer<QWidget> > const&, QAction*,
QAction::ActionEvent, bool) (qmenu.cpp:965)                                     
==16151==    by 0x4F07D06: QMenuPrivate::activateAction(QAction*,
QAction::ActionEvent, bool) (qmenu.cpp:1058)                              
==16151==    by 0x4F0A4C7: QMenu::mouseReleaseEvent(QMouseEvent*)
(qmenu.cpp:2252)                                                          
==16151==    by 0x46867BB: KMenu::mouseReleaseEvent(QMouseEvent*)
(kmenu.cpp:454)                                                           
==16151==    by 0x4AA0E85: QWidget::event(QEvent*) (qwidget.cpp:7516)           
==16151==    by 0x4F05A67: QMenu::event(QEvent*) (qmenu.cpp:2351)               
==16151==    by 0x4A3F0DE: QApplicationPrivate::notify_helper(QObject*,
QEvent*) (qapplication.cpp:4084)                                    
==16151==    by 0x4A3FE4C: QApplication::notify(QObject*, QEvent*)
(qapplication.cpp:3786)                                                  
==16151==    by 0x458998F: KApplication::notify(QObject*, QEvent*)
(kapplication.cpp:307)                                                   
==16151==    by 0x5653DBD: QCoreApplication::notifyInternal(QObject*, QEvent*)
(qcoreapplication.cpp:598)                                   
==16151==    by 0x4A4AE6C: QCoreApplication::sendSpontaneousEvent(QObject*,
QEvent*) (qcoreapplication.h:216)                               
==16151==  Address 0x9a689ac is 4 bytes inside a block of size 408 free'd       
==16151==    at 0x402292C: operator delete(void*) (vg_replace_malloc.c:342)     
==16151==    by 0x4F0B6AC: QMenuPrivate::~QMenuPrivate() (qmenu_p.h:151)        
==16151==    by 0x566B157: QObject::~QObject() (qobject.cpp:865)                
==16151==    by 0x4A9B899: QWidget::~QWidget() (qwidget.cpp:1386)               
==16151==    by 0x4F00578: QMenu::~QMenu() (qmenu.cpp:1373)                     
==16151==    by 0x46879F4: KMenu::~KMenu() (kmenu.cpp:173)                      
==16151==    by 0x5663CF5: QObjectPrivate::deleteChildren() (qobject.cpp:1854)  
==16151==    by 0x4A9B7EC: QWidget::~QWidget() (qwidget.cpp:1373)               
==16151==    by 0x4ED7F4E: QMainWindow::~QMainWindow() (qmainwindow.cpp:328)    
==16151==    by 0x4684B79: KMainWindow::~KMainWindow() (kmainwindow.cpp:467)    
==16151==    by 0x46CAD9B: KXmlGuiWindow::~KXmlGuiWindow()
(kxmlguiwindow.cpp:127)                                                         
==16151==    by 0x40D41BF: KParts::MainWindow::~MainWindow()
(mainwindow.cpp:77)

I get about the same with Qt 4.5 and kdelibs trunk r937775 (4.2.66); kate r937636
but I don't think this is a kate bug...

*** Bug 186870 has been marked as a duplicate of this bug. ***

http://lists.trolltech.com/pipermail/qt-interest/2009-March/003200.html

Can anyone try this under an earlier Qt version?

I had a very similar problem (backtrace even) with Subtitle Composer. The problem turned up to be that the action was being deleted in its handler. Using deleteLater() instead of delete operator was enough to fix the issue.

*** Bug 189127 has been marked as a duplicate of this bug. ***

Looking at http://websvn.kde.org/trunk/qt-copy/src/gui/widgets/qmenu.cpp?r1=958369&r2=958368&pathrev=958369 I feel this is fixed with Qt 4.5.1 (see change in QMenuPrivate::activateCausedStack). Also I cannot reproduce it. Can anyone reproduce with Qt 4.5.1?

*** Bug 190787 has been marked as a duplicate of this bug. ***

SVN commit 961550 by cullmann:

fix crash on exit, not that beautiful, but works
BUG: 185708


 M  +6 -0      katemainwindow.cpp  
 M  +1 -0      katemainwindow.h  


WebSVN link: http://websvn.kde.org/?view=rev&revision=961550

*** Bug 192068 has been marked as a duplicate of this bug. ***

*** Bug 192182 has been marked as a duplicate of this bug. ***

*** Bug 192356 has been marked as a duplicate of this bug. ***

*** Bug 192738 has been marked as a duplicate of this bug. ***

*** Bug 193106 has been marked as a duplicate of this bug. ***

*** Bug 194711 has been marked as a duplicate of this bug. ***

*** Bug 194914 has been marked as a duplicate of this bug. ***

The bug still exists with Kate version that comes with KDE 4.2.4. When closing Kate from Menu it still crashes.

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xb5a89700 (LWP 30387)]
0xb73966d2 in QMenu::findIdForAction () from /usr/lib/libQtGui.so.4

KDE 4.2.2 Kate 3.2.2, Kate crashes on exit signal 11. Backtrace:

Application: Kate (kate), signal SIGSEGV

Thread 1 (Thread 0xb5ac1700 (LWP 6279)):
[KCrash Handler]
#6  0xb73d06d2 in QMenu::findIdForAction (this=0x91c1330, act=0x90d7e40) at widgets/qmenu.cpp:3157
#7  0xb73d1ead in QMenuPrivate::activateCausedStack (this=0x91d0f08, causedStack=@0xbfb95f98, action=0x90d7e40, action_e=QAction::Trigger, self=true) at widgets/qmenu.cpp:965
#8  0xb73d876b in QMenuPrivate::activateAction (this=0x91d0f08, action=0x90d7e40, action_e=QAction::Trigger, self=<value optimized out>) at widgets/qmenu.cpp:1058
#9  0xb73d9242 in QMenu::mouseReleaseEvent (this=0x91d2e08, e=0xbfb965d8) at widgets/qmenu.cpp:2252
#10 0xb7c677e5 in KMenu::mouseReleaseEvent (this=0x91d2e08, e=0xbfb965d8) at /build/buildd/kde4libs-4.2.2/kdeui/widgets/kmenu.cpp:454
#11 0xb6fb3b43 in QWidget::event (this=0x91d2e08, event=0xbfb965d8) at kernel/qwidget.cpp:7516
#12 0xb73db629 in QMenu::event (this=0x91d2e08, e=0xbfb965d8) at widgets/qmenu.cpp:2351
#13 0xb6f5ce9c in QApplicationPrivate::notify_helper (this=0x8f24de8, receiver=0x91d2e08, e=0xbfb965d8) at kernel/qapplication.cpp:4084
#14 0xb6f65b11 in QApplication::notify (this=0xbfb97018, receiver=0x91d2e08, e=0xbfb965d8) at kernel/qapplication.cpp:3786
#15 0xb7b8094d in KApplication::notify (this=0xbfb97018, receiver=0x91d2e08, event=0xbfb965d8) at /build/buildd/kde4libs-4.2.2/kdeui/kernel/kapplication.cpp:307
#16 0xb6a8ba3b in QCoreApplication::notifyInternal (this=0xbfb97018, receiver=0x91d2e08, event=0xbfb965d8) at kernel/qcoreapplication.cpp:602
#17 0xb6f64b7e in QApplicationPrivate::sendMouseEvent (receiver=0x91d2e08, event=0xbfb965d8, alienWidget=0x0, nativeWidget=0x91d2e08, buttonDown=0xb7807200, lastMouseReceiver=@0xb7807204)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#18 0xb6fd4c06 in QETWidget::translateMouseEvent (this=0x91d2e08, event=0xbfb96c1c) at kernel/qapplication_x11.cpp:4359
#19 0xb6fd3ca7 in QApplication::x11ProcessEvent (this=0xbfb97018, event=0xbfb96c1c) at kernel/qapplication_x11.cpp:3421
#20 0xb6ffec6a in x11EventSourceDispatch (s=0x8f27e00, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#21 0xb5e3fb88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#22 0xb5e430eb in ?? () from /usr/lib/libglib-2.0.so.0
#23 0xb5e43268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#24 0xb6ab7438 in QEventDispatcherGlib::processEvents (this=0x8f11c68, flags={i = -1078366760}) at kernel/qeventdispatcher_glib.cpp:323
#25 0xb6ffe365 in QGuiEventDispatcherGlib::processEvents (this=0x8f11c68, flags={i = -1078366712}) at kernel/qguieventdispatcher_glib.cpp:202
#26 0xb6a8a06a in QEventLoop::processEvents (this=0xbfb96e80, flags={i = -1078366648}) at kernel/qeventloop.cpp:149
#27 0xb6a8a4aa in QEventLoop::exec (this=0xbfb96e80, flags={i = -1078366584}) at kernel/qeventloop.cpp:200
#28 0xb6a8c959 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:880
#29 0xb6f5cd17 in QApplication::exec () at kernel/qapplication.cpp:3553
#30 0xb805f73d in kdemain () from /usr/lib/libkdeinit4_kate.so
#31 0x08048672 in _start ()

*** Bug 199571 has been marked as a duplicate of this bug. ***

*** Bug 194848 has been marked as a duplicate of this bug. ***

*** Bug 199915 has been marked as a duplicate of this bug. ***

*** Bug 201279 has been marked as a duplicate of this bug. ***

*** Bug 197869 has been marked as a duplicate of this bug. ***

If it's been fixed, why does my Crash Handler still report a Fatal Error signal 11 (SIGSEGV) when I quit my Kate from her File menu?  I'm unable to create a valid backtrace, and don't know how to take advantage of the fix.

SVN commit 1090955 by dhaumann:

better fix for crash:  kate crash on close in QMenu
-> use QtConnection instead of singleShot timer

CCBUG: 185708


 M  +4 -8      katemainwindow.cpp  
 M  +0 -1      katemainwindow.h  


WebSVN link: http://websvn.kde.org/?view=rev&revision=1090955