Version: (using KDE 4.2.0) Installed from: Gentoo Packages Hello, Kalarm have crash at close. See back trace: Application: KAlarm (kalarm), signal SIGSEGV 0x00007f6aebfd9901 in nanosleep () from /lib/libc.so.6 Current language: auto; currently c [Current thread is 0 (LWP 5531)] Thread 2 (Thread 0x7f6ae14be950 (LWP 5542)): #0 0x00007f6aec003682 in select () from /lib/libc.so.6 #1 0x00007f6aee046f05 in QProcessManager::run (this=0x2056d10) at io/qprocess_unix.cpp:300 #2 0x00007f6aedf86a69 in QThreadPrivate::start (arg=0x2056d10) at thread/qthread_unix.cpp:184 #3 0x00007f6aedd12007 in start_thread (arg=<value optimized out>) at pthread_create.c:297 #4 0x00007f6aec009f7d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112 #5 0x0000000000000000 in ?? () Thread 1 (Thread 0x7f6af1164750 (LWP 5531)): [KCrash Handler] #5 0x00007f6aecfbea0e in QMenu::findIdForAction (this=0x21f3c20, act=0x220bef0) at widgets/qmenu.cpp:3152 #6 0x00007f6aecfbfa7c in QMenuPrivate::activateCausedStack (this=0x21f10c0, causedStack=@0x7ffff91a41d0, action=0x220bef0, action_e=QAction::Trigger, self=true) at widgets/qmenu.cpp:960 #7 0x00007f6aecfc603b in QMenuPrivate::activateAction (this=0x21f10c0, action=0x220bef0, action_e=36403456, self=true) at widgets/qmenu.cpp:1053 #8 0x00007f6aeeca6cf5 in KMenu::mouseReleaseEvent (this=0x22b7900, e=0x7ffff91a4d80) at /var/tmp/portage/kde-base/kdelibs-4.2.0-r3/work/kdelibs-4.2.0/kdeui/widgets/kmenu.cpp:454 #9 0x00007f6aecc2b670 in QWidget::event (this=0x22b7900, event=0x7ffff91a4d80) at kernel/qwidget.cpp:7511 #10 0x00007f6aecfc75e3 in QMenu::event (this=0x22b7900, e=0x7ffff91a4d80) at widgets/qmenu.cpp:2346 #11 0x00007f6aecbd884d in QApplicationPrivate::notify_helper (this=0x2053130, receiver=0x22b7900, e=0x7ffff91a4d80) at kernel/qapplication.cpp:4051 #12 0x00007f6aecbe1b1d in QApplication::notify (this=<value optimized out>, receiver=0x22b7900, e=0x7ffff91a4d80) at kernel/qapplication.cpp:3753 #13 0x00007f6aeebee2a1 in KApplication::notify (this=0x2046390, receiver=0x22b7900, event=0x7ffff91a4d80) at /var/tmp/portage/kde-base/kdelibs-4.2.0-r3/work/kdelibs-4.2.0/kdeui/kernel/kapplication.cpp:307 #14 0x00007f6aee065963 in QCoreApplication::notifyInternal (this=0x2046390, receiver=0x22b7900, event=0x7ffff91a4d80) at kernel/qcoreapplication.cpp:590 #15 0x00007f6aecbe0ca2 in QApplicationPrivate::sendMouseEvent (receiver=0x22b7900, event=0x7ffff91a4d80, alienWidget=0x0, nativeWidget=0x22b7900, buttonDown=<value optimized out>, lastMouseReceiver=@0x7f6aed57afd0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:211 #16 0x00007f6aecc41bdb in QETWidget::translateMouseEvent (this=0x22b7900, event=<value optimized out>) at kernel/qapplication_x11.cpp:4348 #17 0x00007f6aecc408c5 in QApplication::x11ProcessEvent (this=0x2046390, event=0x7ffff91a5720) at kernel/qapplication_x11.cpp:3532 #18 0x00007f6aecc65d9c in x11EventSourceDispatch (s=0x20563d0, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:141 #19 0x00007f6ae7019212 in IA__g_main_context_dispatch (context=0x2054310) at gmain.c:2144 #20 0x00007f6ae701c92d in g_main_context_iterate (context=0x2054310, block=1, dispatch=1, self=<value optimized out>) at gmain.c:2778 #21 0x00007f6ae701caeb in IA__g_main_context_iteration (context=0x2054310, may_block=1) at gmain.c:2841 #22 0x00007f6aee08d49f in QEventDispatcherGlib::processEvents (this=0x204ef70, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:318 #23 0x00007f6aecc655ff in QGuiEventDispatcherGlib::processEvents (this=0x21f3c20, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:197 #24 0x00007f6aee064602 in QEventLoop::processEvents (this=<value optimized out>, flags={i = -115713520}) at kernel/qeventloop.cpp:144 #25 0x00007f6aee064795 in QEventLoop::exec (this=0x7ffff91a5a50, flags={i = -115713440}) at kernel/qeventloop.cpp:191 #26 0x00007f6aee069356 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:872 #27 0x000000000045875b in main (argc=3, argv=0x7ffff91a6928) at /var/tmp/portage/kde-base/kalarm-4.2.0/work/kalarm-4.2.0/kalarm/main.cpp:123
How exactly did you close KAlarm? What version of Qt are you using?
Qt 4.5 I have never used kalarm, just open, restart kde, close kalarm.
But what method did you use to close KAlarm? Did you use the menu File -> Quit? or what?
The cross on the with (top, and most at right).
Bug 185017 seems to have a similar backtrace, but in another app and situation. May be it's a Qt4.5 bug (or KDE4.2+Qt4.5 bug)
I have had a look at this through Valgrind,and it looks like kalarm is deleting the QAction (KActionCollection::~KActionCollection() ), and then later when QMenu::findIdForAction(QAction*) is called, QAction::d_func() will be invalid. This seems to be an implementation error in kalarm. From this reasoning, I am guessing that 185017 is not a Qt bug either. valgrind output: ==12479== Invalid read of size 8 ==12479== at 0x8683464: QAction::d_func() (qaction.h:67) ==12479== by 0x8BF904C: QMenu::findIdForAction(QAction*) const (qmenu.cpp:3157) ==12479== by 0x8BFCD6B: QMenuPrivate::activateCausedStack(QList<QPointer<QWidget> > const&, QAction*, QAction::ActionEvent, bool) (qmenu.cpp:965) ==12479== by 0x8C01938: QMenuPrivate::activateAction(QAction*, QAction::ActionEvent, bool) (qmenu.cpp:1058) ==12479== by 0x8C0392B: QMenu::mouseReleaseEvent(QMouseEvent*) (qmenu.cpp:2252) ==12479== by 0x793E270: KMenu::mouseReleaseEvent(QMouseEvent*) (in /usr/lib/libkdeui.so.5.2.0) ==12479== by 0x86F7BBE: QWidget::event(QEvent*) (qwidget.cpp:7516) ==12479== by 0x8C02C5B: QMenu::event(QEvent*) (qmenu.cpp:2351) ==12479== by 0x8686EC6: QApplicationPrivate::notify_helper(QObject*, QEvent*) (qapplication.cpp:4084) ==12479== by 0x8687CBD: QApplication::notify(QObject*, QEvent*) (qapplication.cpp:3786) ==12479== by 0x786D5DA: KApplication::notify(QObject*, QEvent*) (in /usr/lib/libkdeui.so.5.2.0) ==12479== by 0x9BECEF6: QCoreApplication::notifyInternal(QObject*, QEvent*) (qcoreapplication.cpp:602) ==12479== Address 0x14e2a7c8 is 8 bytes inside a block of size 24 free'd ==12479== at 0x4C24DAD: operator delete(void*) (vg_replace_malloc.c:342) ==12479== by 0x9C009D8: QObjectPrivate::deleteChildren() (qobject.cpp:1845) ==12479== by 0x9C09BE8: QObject::~QObject() (qobject.cpp:844) ==12479== by 0x7797475: KActionCollection::~KActionCollection() (in /usr/lib/libkdeui.so.5.2.0) ==12479== by 0x78EC07E: KSystemTrayIcon::~KSystemTrayIcon() (in /usr/lib/libkdeui.so.5.2.0) ==12479== by 0x4DD139: (within /usr/bin/kalarm) ==12479== by 0x4ABE92: (within /usr/bin/kalarm) ==12479== by 0x4AA47A: (within /usr/bin/kalarm) ==12479== by 0x49B2D8: (within /usr/bin/kalarm) ==12479== by 0x49B8DE: (within /usr/bin/kalarm) ==12479== by 0x4DC297: (within /usr/bin/kalarm) ==12479== by 0x9C086B5: QMetaObject::activate(QObject*, int, int, void**) (qobject.cpp:3060) ==12479==
Now fixed for KDE 4.2.2 (SVN commits 935343, 935344).