Bug 321930

Application: cantor (0.3)
KDE Platform Version: 4.8.5 (4.8.5)
Qt Version: 4.8.1
Operating System: Linux 3.2.0-49-generic x86_64
Distribution: Ubuntu 12.04.2 LTS

-- Information about the crash:
- What I was doing when the application crashed:

Every time I check the About information on Cantor, it simply crashes. I had Kalgebra backend during the crash.

The crash can be reproduced every time.

-- Backtrace:
Application: Cantor (cantor), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fe628538780 (LWP 25951))]

Thread 4 (Thread 0x7fe60ea54700 (LWP 25953)):
#0  0x00007fe6252e5313 in poll () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007fe621e6dff6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe621e6e45a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe60ea5998b in ?? () from /usr/lib/x86_64-linux-gnu/gio/modules/libdconfsettings.so
#4  0x00007fe621e8f9b5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fe62233ae9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x00007fe6252f0ccd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#7  0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7fe60e022700 (LWP 25954)):
#0  0x00007fe6252e5313 in poll () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007fe621e6dff6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe621e6e45a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe615bad5e6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007fe621e8f9b5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fe62233ae9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x00007fe6252f0ccd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#7  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fe607fff700 (LWP 27655)):
#0  0x00007fe6252ea033 in select () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007fe625a1506f in QProcessManager::run (this=0x7fe625d8d500) at io/qprocess_unix.cpp:245
#2  0x00007fe625937fcb in QThreadPrivate::start (arg=0x7fe625d8d500) at thread/qthread_unix.cpp:298
#3  0x00007fe62233ae9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007fe6252f0ccd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#5  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fe628538780 (LWP 25951)):
[KCrash Handler]
#6  0x00007fe625a4ab02 in QObject::disconnect (sender=0x1a6c1d0, signal=0x1b7e3d9 "rowsInserted(QModelIndex,int,int)", receiver=0x1b2d4c0, method=0x1b7d679 "_k_slotRowsInserted(QModelIndex,int,int)") at kernel/qobject.cpp:2891
#7  0x00007fe627f04cff in ?? () from /usr/lib/libkdeui.so.5
#8  0x00007fe625a37028 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<optimized out>, receiver=0x1a71df0, event=0x7fff2d32e600) at kernel/qcoreapplication.cpp:986
#9  0x00007fe62643085f in notify_helper (e=0x7fff2d32e600, receiver=0x1a71df0, this=0xf2ac10) at kernel/qapplication.cpp:4555
#10 QApplicationPrivate::notify_helper (this=0xf2ac10, receiver=0x1a71df0, e=0x7fff2d32e600) at kernel/qapplication.cpp:4531
#11 0x00007fe626435713 in QApplication::notify (this=0x7fff2d32f5f0, receiver=0x1a71df0, e=0x7fff2d32e600) at kernel/qapplication.cpp:4420
#12 0x00007fe627f263f6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#13 0x00007fe625a36e9c in QCoreApplication::notifyInternal (this=0x7fff2d32f5f0, receiver=0x1a71df0, event=0x7fff2d32e600) at kernel/qcoreapplication.cpp:876
#14 0x00007fe62694b30d in sendEvent (event=0x7fff2d32e600, receiver=0x1a71df0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#15 QAccessible::queryAccessibleInterface (object=0x1a71df0) at accessible/qaccessible.cpp:593
#16 0x00007fe62695151d in QAccessible::updateAccessibility (o=<optimized out>, who=0, reason=QAccessible::ObjectDestroyed) at accessible/qaccessible_unix.cpp:102
#17 0x00007fe62647b74f in QWidget::~QWidget (this=0x1a71df0, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1679
#18 0x00007fe62647ba19 in QWidget::~QWidget (this=0x1a71df0, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1700
#19 0x00007fe625a49935 in QObjectPrivate::deleteChildren (this=0x16d6c30) at kernel/qobject.cpp:1908
#20 0x00007fe62647b740 in QWidget::~QWidget (this=0x1ace2e0, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1676
#21 0x00007fe627e9ef8e in ?? () from /usr/lib/libkdeui.so.5
#22 0x00007fe625a49935 in QObjectPrivate::deleteChildren (this=0x1a6b570) at kernel/qobject.cpp:1908
#23 0x00007fe62647b740 in QWidget::~QWidget (this=0x1a1b8f0, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1676
#24 0x00007fe62647ba19 in QWidget::~QWidget (this=0x1a1b8f0, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1700
#25 0x00007fe625a49935 in QObjectPrivate::deleteChildren (this=0x1ae6a00) at kernel/qobject.cpp:1908
#26 0x00007fe62647b740 in QWidget::~QWidget (this=0x1ae2d40, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1676
#27 0x00007fe62689c4b9 in QStackedWidget::~QStackedWidget (this=0x1ae2d40, __in_chrg=<optimized out>) at widgets/qstackedwidget.cpp:193
#28 0x00007fe625a49935 in QObjectPrivate::deleteChildren (this=0x19b1290) at kernel/qobject.cpp:1908
#29 0x00007fe62647b740 in QWidget::~QWidget (this=0x1a1c3b0, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1676
#30 0x00007fe6268a7fa9 in QTabWidget::~QTabWidget (this=0x1a1c3b0, __in_chrg=<optimized out>) at widgets/qtabwidget.cpp:367
#31 0x00007fe625a49935 in QObjectPrivate::deleteChildren (this=0x16dadc0) at kernel/qobject.cpp:1908
#32 0x00007fe62647b740 in QWidget::~QWidget (this=0x1b2e910, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1676
#33 0x00007fe62647ba19 in QWidget::~QWidget (this=0x1b2e910, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1700
#34 0x00007fe625a49935 in QObjectPrivate::deleteChildren (this=0x1ae5eb0) at kernel/qobject.cpp:1908
#35 0x00007fe62647b740 in QWidget::~QWidget (this=0x1ade3b0, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1676
#36 0x00007fe627e92729 in KAboutApplicationDialog::~KAboutApplicationDialog() () from /usr/lib/libkdeui.so.5
#37 0x00007fe627fd13be in KHelpMenu::timerExpired() () from /usr/lib/libkdeui.so.5
#38 0x00007fe625a50446 in QObject::event (this=0x126db70, e=<optimized out>) at kernel/qobject.cpp:1195
#39 0x00007fe626430894 in notify_helper (e=0x1b72130, receiver=0x126db70, this=0xf2ac10) at kernel/qapplication.cpp:4559
#40 QApplicationPrivate::notify_helper (this=0xf2ac10, receiver=0x126db70, e=0x1b72130) at kernel/qapplication.cpp:4531
#41 0x00007fe626435713 in QApplication::notify (this=0x7fff2d32f5f0, receiver=0x126db70, e=0x1b72130) at kernel/qapplication.cpp:4420
#42 0x00007fe627f263f6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#43 0x00007fe625a36e9c in QCoreApplication::notifyInternal (this=0x7fff2d32f5f0, receiver=0x126db70, event=0x1b72130) at kernel/qcoreapplication.cpp:876
#44 0x00007fe625a3ac6a in sendEvent (event=0x1b72130, receiver=0x126db70) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#45 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0xf02670) at kernel/qcoreapplication.cpp:1500
#46 0x00007fe625a65f93 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#47 postEventSourceDispatch (s=<optimized out>) at kernel/qeventdispatcher_glib.cpp:279
#48 0x00007fe621e6dd13 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#49 0x00007fe621e6e060 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#50 0x00007fe621e6e124 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#51 0x00007fe625a663bf in QEventDispatcherGlib::processEvents (this=0xf03b30, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#52 0x00007fe6264d8d5e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#53 0x00007fe625a35c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#54 0x00007fe625a35ed7 in QEventLoop::exec (this=0x7fff2d32f580, flags=...) at kernel/qeventloop.cpp:204
#55 0x00007fe625a3af67 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#56 0x000000000040a28f in ?? ()
#57 0x00007fe62521e76d in __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6
#58 0x000000000040a475 in _start ()

Possible duplicates by query: bug 305931.

Reported using DrKonqi