Cannot reproduce this crash. Tried multiple times and I cannot get it to crash.

After having erased all cookies, I can no longer reproduce. It happened while I deleted existing cookies from KDE 4.9, which is maybe another indication that they are handled/saved differently now.

(In reply to comment #2)
> After having erased all cookies, I can no longer reproduce. It happened
> while I deleted existing cookies from KDE 4.9, which is maybe another
> indication that they are handled/saved differently now.

Nope. They are not. Only a new policy was added and unless you have kdelibs-4.10 branch, you will not get those necessary changes. IOW, kde-baseapps master needs to start requiring the kdelibs-4.10 branch to work properly. There is no way around it.

(In reply to comment #3)
> (In reply to comment #2)
> > After having erased all cookies, I can no longer reproduce. It happened
> > while I deleted existing cookies from KDE 4.9, which is maybe another
> > indication that they are handled/saved differently now.
> 
> Nope. They are not. Only a new policy was added and unless you have
> kdelibs-4.10 branch, you will not get those necessary changes. IOW,
> kde-baseapps master needs to start requiring the kdelibs-4.10 branch to work
> properly. There is no way around it.

Hmm... but it says here that you are using 4.9.80 which means you are using kdelibs 4.10. Oh well... Can you please send me your kcookiejarrc file if you have not manually deleted that already ? I did this update and it did not seem to have affected my setup, but my global cookies policy was to accept all cookies as if they are session cookies. Perhaps different global policies and settings would cause the issues you reported here.

I just got the same crash by just changing

Cookies > Policy > Default Policy

to "Reject all cookies", then hit Apply.

This at least confirms that the crash is not dependend on old files, the current "cookies" file has been entirely "collected" today.

(yes, running kdelibs 4.10 branch, master for everything else)

(In reply to comment #5)
> I just got the same crash by just changing
> 
> Cookies > Policy > Default Policy
> 
> to "Reject all cookies", then hit Apply.
> 
> This at least confirms that the crash is not dependend on old files, the
> current "cookies" file has been entirely "collected" today.
> 
> (yes, running kdelibs 4.10 branch, master for everything else)

OK, I can duplicate that. I will fix it.

Git commit a791edd3d42a9b40c2d64b39048e0260d5632891 by Dawit Alemayehu.
Committed on 05/10/2012 at 01:51.
Pushed by adawit into branch 'master'.

Do not crash when global policy is changed and the Apply button is pressed.
FIXED-IN: 4.10

M  +24   -29   konqueror/settings/kio/kcookiespolicies.cpp
M  +1    -1    konqueror/settings/kio/kcookiespolicies.h

http://commits.kde.org/kde-baseapps/a791edd3d42a9b40c2d64b39048e0260d5632891

Hmmm, don't rush it, doesn't compile :)

The same problems happen in Rekonq. Could the patch be backported to 4.9.3? I think it's too long to wait, over three months, till 4.10 is released.

The same things happens to me, but I'm NOT using 4.10 kdelibs, everything is just 4.9.2 here.

I second the request to have this fix backported for 4.9.3.

It is not a simple matter to port this patch back to the 4.9 branch because many changes were made in the master branch prior to committing this fix. Moreover, are you both sure the back trace generated by the crash in your system the same as the one posted here ?

(In reply to comment #11)
> Moreover, are you both sure the back trace generated by the crash in your
> system the same as the one posted here ?

I'm reasonably certain it is. It also happens in 
KCookiesPolicies::save (and ultimately qtreewdigdet).

This is what the backtrace looks like for me:


Application: Konqueror (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fda8ffdc780 (LWP 4902))]

Thread 2 (Thread 0x7fda79b1f700 (LWP 4908)):
#0  0x00007fda962c8373 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fda92d516ae in g_main_context_poll (n_fds=2, fds=0x7fda74002bb0, timeout=-1, context=0x7fda740009a0, priority=<optimized out>) at gmain.c:3440
#2  g_main_context_iterate (dispatch=1, block=<optimized out>, context=0x7fda740009a0, self=<optimized out>) at gmain.c:3141
#3  g_main_context_iterate (context=0x7fda740009a0, block=<optimized out>, dispatch=1, self=<optimized out>) at gmain.c:3083
#4  0x00007fda92d517cc in g_main_context_iteration (context=0x7fda740009a0, may_block=1) at gmain.c:3207
#5  0x00007fda9794fa2e in QEventDispatcherGlib::processEvents (this=0x7fda740008c0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007fda9791f692 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007fda9791f917 in QEventLoop::exec (this=0x7fda79b1edd0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007fda9781f67f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#9  0x00007fda978ff53f in QInotifyFileSystemWatcherEngine::run (this=0x2979540) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x00007fda9782265b in QThreadPrivate::start (arg=0x2979540) at thread/qthread_unix.cpp:307
#11 0x00007fda97589006 in start_thread (arg=0x7fda79b1f700) at pthread_create.c:305
#12 0x00007fda962d0f8d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 1 (Thread 0x7fda8ffdc780 (LWP 4902)):
[KCrash Handler]
#6  0x00007fda7afdc34c in text (column=0, this=0x20254b0) at /usr/include/qt4/QtGui/qtreewidget.h:110
#7  KCookiesPolicies::save (this=0x2c67db0) at /var/tmp/portage/kde-base/konqueror-4.9.2/work/konqueror-4.9.2/konqueror/settings/kio/kcookiespolicies.cpp:391
#8  0x00007fda7afda771 in KCookiesMain::save (this=0x2c2e790) at /var/tmp/portage/kde-base/konqueror-4.9.2/work/konqueror-4.9.2/konqueror/settings/kio/kcookiesmain.cpp:70
#9  0x00007fda87973dc7 in KCModuleProxy::save (this=<optimized out>) at /var/tmp/portage/kde-base/kdelibs-4.9.2/work/kdelibs-4.9.2/kutils/kcmoduleproxy.cpp:279
#10 0x00007fda87970c40 in KCMultiDialogPrivate::apply (this=<optimized out>) at /var/tmp/portage/kde-base/kdelibs-4.9.2/work/kdelibs-4.9.2/kutils/kcmultidialog.cpp:300
#11 0x00007fda97934971 in QMetaObject::activate (sender=0x1ab5180, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3547
#12 0x00007fda98677f3a in KDialog::slotButtonClicked (this=0x1ab5180, button=8) at /var/tmp/portage/kde-base/kdelibs-4.9.2/work/kdelibs-4.9.2/kdeui/dialogs/kdialog.cpp:888
#13 0x00007fda986783b4 in qt_static_metacall (_a=<optimized out>, _id=<optimized out>, _o=<optimized out>, _c=<optimized out>) at /var/tmp/portage/kde-base/kdelibs-4.9.2/work/kdelibs-4.9.2_build/kdeui/kdialog.moc:167
#14 KDialog::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at /var/tmp/portage/kde-base/kdelibs-4.9.2/work/kdelibs-4.9.2_build/kdeui/kdialog.moc:127
#15 0x00007fda97934971 in QMetaObject::activate (sender=0x2025cc0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff2475fdc0) at kernel/qobject.cpp:3547
#16 0x00007fda9793c0ee in QSignalMapper::mapped (this=<optimized out>, _t1=8) at .moc/release-shared/moc_qsignalmapper.cpp:115
#17 0x00007fda9793c62b in QSignalMapper::map (this=0x2025cc0, sender=0x1fa8630) at kernel/qsignalmapper.cpp:266
#18 0x00007fda97934971 in QMetaObject::activate (sender=0x1fa8630, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff2475ff70) at kernel/qobject.cpp:3547
#19 0x00007fda970fa1b2 in QAbstractButton::clicked (this=<optimized out>, _t1=false) at .moc/release-shared/moc_qabstractbutton.cpp:220
#20 0x00007fda96e35fce in QAbstractButtonPrivate::emitClicked (this=<optimized out>) at widgets/qabstractbutton.cpp:548
#21 0x00007fda96e37320 in QAbstractButtonPrivate::click (this=0x1fbe990) at widgets/qabstractbutton.cpp:541
#22 0x00007fda96e3754c in QAbstractButton::mouseReleaseEvent (this=0x1fa8630, e=0x7fff24760a60) at widgets/qabstractbutton.cpp:1123
#23 0x00007fda96ad3bce in QWidget::event (this=0x1fa8630, event=0x7fff24760a60) at kernel/qwidget.cpp:8371
#24 0x00007fda96a82ed4 in notify_helper (e=0x7fff24760a60, receiver=0x1fa8630, this=0x6e3ce0) at kernel/qapplication.cpp:4551
#25 QApplicationPrivate::notify_helper (this=0x6e3ce0, receiver=0x1fa8630, e=0x7fff24760a60) at kernel/qapplication.cpp:4523
#26 0x00007fda96a88591 in QApplication::notify (this=<optimized out>, receiver=0x1fa8630, e=0x7fff24760a60) at kernel/qapplication.cpp:4094
#27 0x00007fda98723628 in KApplication::notify (this=0x7fff247616e0, receiver=0x1fa8630, event=0x7fff24760a60) at /var/tmp/portage/kde-base/kdelibs-4.9.2/work/kdelibs-4.9.2/kdeui/kernel/kapplication.cpp:311
#28 0x00007fda97920bcb in QCoreApplication::notifyInternal (this=0x7fff247616e0, receiver=0x1fa8630, event=0x7fff24760a60) at kernel/qcoreapplication.cpp:915
#29 0x00007fda96a83e42 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#30 QApplicationPrivate::sendMouseEvent (receiver=0x1fa8630, event=0x7fff24760a60, alienWidget=0x1fa8630, nativeWidget=0x1ab5180, buttonDown=0x1fa8630, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:3162
#31 0x00007fda96b006ff in QETWidget::translateMouseEvent (this=0x1ab5180, event=<optimized out>) at kernel/qapplication_x11.cpp:4502
#32 0x00007fda96aff512 in QApplication::x11ProcessEvent (this=0x7fff247616e0, event=0x7fff24761180) at kernel/qapplication_x11.cpp:3625
#33 0x00007fda96b26b92 in x11EventSourceDispatch (s=0x6e6610, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#34 0x00007fda92d513d2 in g_main_dispatch (context=0x6e5300) at gmain.c:2539
#35 g_main_context_dispatch (context=0x6e5300) at gmain.c:3075
#36 0x00007fda92d51710 in g_main_context_iterate (dispatch=1, block=<optimized out>, context=0x6e5300, self=<optimized out>) at gmain.c:3146
#37 g_main_context_iterate (context=0x6e5300, block=<optimized out>, dispatch=1, self=<optimized out>) at gmain.c:3083
#38 0x00007fda92d517cc in g_main_context_iteration (context=0x6e5300, may_block=1) at gmain.c:3207
#39 0x00007fda9794f9d6 in QEventDispatcherGlib::processEvents (this=0x612740, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#40 0x00007fda96b26866 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#41 0x00007fda9791f692 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#42 0x00007fda9791f917 in QEventLoop::exec (this=0x7fff24761510, flags=...) at kernel/qeventloop.cpp:204
#43 0x00007fda97924785 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1187
#44 0x00007fda84b33a71 in kdemain (argc=<optimized out>, argv=<optimized out>) at /var/tmp/portage/kde-base/konqueror-4.9.2/work/konqueror-4.9.2/konqueror/src/konqmain.cpp:227
#45 0x0000000000408b9c in launch (argc=2, _name=0x6799e8 "/usr/bin/konqueror", args=<optimized out>, cwd=0x0, envc=<optimized out>, envs=<optimized out>, reset_env=false, tty=0x0, avoid_loops=false, startup_id_str=0x679a14 "tolkien;1350141167;404814;3027_TIME6361105") at /var/tmp/portage/kde-base/kdelibs-4.9.2/work/kdelibs-4.9.2/kinit/kinit.cpp:734
#46 0x0000000000409c76 in handle_launcher_request (sock=7, who=<optimized out>) at /var/tmp/portage/kde-base/kdelibs-4.9.2/work/kdelibs-4.9.2/kinit/kinit.cpp:1226
#47 0x000000000040a1c3 in handle_requests (waitForPid=0) at /var/tmp/portage/kde-base/kdelibs-4.9.2/work/kdelibs-4.9.2/kinit/kinit.cpp:1419
#48 0x0000000000405b2d in main (argc=2, argv=0x7fff24762bc0, envp=0x7fff24762e90) at /var/tmp/portage/kde-base/kdelibs-4.9.2/work/kdelibs-4.9.2/kinit/kinit.cpp:1907

(In reply to comment #12)
> (In reply to comment #11)
> > Moreover, are you both sure the back trace generated by the crash in your
> > system the same as the one posted here ?

(In reply to comment #12)
> (In reply to comment #11)
> > Moreover, are you both sure the back trace generated by the crash in your
> > system the same as the one posted here ?
> 
> I'm reasonably certain it is. It also happens in 
> KCookiesPolicies::save (and ultimately qtreewdigdet).

Ok. Can either one of you test the attached patch to make sure it compiles. I am on the 4.10 branch and do not have the time to test this patch at the moment. If it works, then I can push it into the 4.9 branch.

Created attachment 74516 [details]
proposed patch for 4.9 branch

Doesn't compile:

[ 92%] Building CXX object konqueror/settings/kio/CMakeFiles/kcm_kio.dir/kcookiespolicies.o
cd /var/tmp/portage/kde-base/konqueror-4.9.2-r1/work/konqueror-4.9.2_build/konqueror/settings/kio && /usr/lib64/ccache/bin/x86_64-pc-linux-gnu-g++  -DMAKE_KCM_KIO_LIB -D_BSD_SOURCE -D_XOPEN_SOURCE=500 -D_BSD_SOURCE -DQT_NO_STL -DQT_NO_CAST_TO_ASCII -D_REENTRANT -DKDE_DEPRECATED_WARNINGS -DKDE4_CMAKE_TOPLEVEL_DIR_LENGTH=49 -DDISABLE_NEPOMUK_LEGACY -DQT_USE_FAST_CONCATENATION -DQT_USE_FAST_OPERATOR_PLUS -D_LARGEFILE64_SOURCE  -DQT_NO_DEBUG -DNDEBUG -O2 -pipe -fomit-frame-pointer -march=bdver1 -mtune=bdver1 -mcx16 -msahf -maes -mpclmul -mpopcnt -mabm -mlwp -mavx -ggdb  -Wnon-virtual-dtor -Wno-long-long -Wundef -Wcast-align -Wchar-subscripts -Wall -W -Wpointer-arith -Wformat-security -fno-exceptions -DQT_NO_EXCEPTIONS -fno-check-new -fno-common -Woverloaded-virtual -fno-threadsafe-statics -fvisibility=hidden -Werror=return-type -fvisibility-inlines-hidden -fPIC -I/var/tmp/portage/kde-base/konqueror-4.9.2-r1/work/konqueror-4.9.2_build/konqueror/settings/kio -I/var/tmp/portage/kde-base/konqueror-4.9.2-r1/work/konqueror-4.9.2/konqueror/settings/kio -I/var/tmp/portage/kde-base/konqueror-4.9.2-r1/work/konqueror-4.9.2_build -I/var/tmp/portage/kde-base/konqueror-4.9.2-r1/work/konqueror-4.9.2/lib/konq -I/usr/include/KDE -I/usr/include/qt4/QtXmlPatterns -I/usr/include/qt4/QtXml -I/usr/include/qt4/QtWebKit -I/usr/include/qt4/QtUiTools -I/usr/include/qt4/QtTest -I/usr/include/qt4/QtSvg -I/usr/include/qt4/QtSql -I/usr/include/qt4/QtScriptTools -I/usr/include/qt4/QtScript -I/usr/include/qt4/QtOpenGL -I/usr/include/qt4/QtNetwork -I/usr/include/qt4/QtMultimedia -I/usr/include/qt4/QtDesigner -I/usr/include/qt4/QtDeclarative -I/usr/include/qt4/QtDBus -I/usr/include/qt4/Qt3Support -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtCore -I/usr/include/qt4/Qt -I/usr/share/qt4/mkspecs/default -I/usr/include/qt4    -D_GNU_SOURCE -D_LARGEFILE64_SOURCE -o CMakeFiles/kcm_kio.dir/kcookiespolicies.o -c /var/tmp/portage/kde-base/konqueror-4.9.2-r1/work/konqueror-4.9.2/konqueror/settings/kio/kcookiespolicies.cpp
/var/tmp/portage/kde-base/konqueror-4.9.2-r1/work/konqueror-4.9.2/konqueror/settings/kio/kcookiespolicies.cpp: In member function ‘void KCookiesPolicies::addNewPolicy(const QString&)’:
/var/tmp/portage/kde-base/konqueror-4.9.2-r1/work/konqueror-4.9.2/konqueror/settings/kio/kcookiespolicies.cpp:189:30: warning: unused variable ‘item’ [-Wunused-variable]
/var/tmp/portage/kde-base/konqueror-4.9.2-r1/work/konqueror-4.9.2/konqueror/settings/kio/kcookiespolicies.cpp: In member function ‘virtual void KCookiesPolicies::save()’:
/var/tmp/portage/kde-base/konqueror-4.9.2-r1/work/konqueror-4.9.2/konqueror/settings/kio/kcookiespolicies.cpp:386:68: error: no matching function for call to ‘QMapIterator<QTreeWidgetItem*, const char*>::QMapIterator(QMap<QString, const char*>&)’
/var/tmp/portage/kde-base/konqueror-4.9.2-r1/work/konqueror-4.9.2/konqueror/settings/kio/kcookiespolicies.cpp:386:68: note: candidates are:
/usr/include/qt4/QtCore/qmap.h:1083:255: note: QMapIterator<Key, T>::QMapIterator(const QMap<Key, T>&) [with Key = QTreeWidgetItem*, T = const char*]
/usr/include/qt4/QtCore/qmap.h:1083:255: note:   no known conversion for argument 1 from ‘QMap<QString, const char*>’ to ‘const QMap<QTreeWidgetItem*, const char*>&’
/usr/include/qt4/QtCore/qmap.h:1083:37: note: QMapIterator<QTreeWidgetItem*, const char*>::QMapIterator(const QMapIterator<QTreeWidgetItem*, const char*>&)
/usr/include/qt4/QtCore/qmap.h:1083:37: note:   no known conversion for argument 1 from ‘QMap<QString, const char*>’ to ‘const QMapIterator<QTreeWidgetItem*, const char*>&’
/var/tmp/portage/kde-base/konqueror-4.9.2-r1/work/konqueror-4.9.2/konqueror/settings/kio/kcookiespolicies.cpp:389:33: error: conversion from ‘QTreeWidgetItem* const’ to non-scalar type ‘QString’ requested
In file included from /var/tmp/portage/kde-base/konqueror-4.9.2-r1/work/konqueror-4.9.2/konqueror/settings/kio/kcookiespolicies.cpp:473:0:
/var/tmp/portage/kde-base/konqueror-4.9.2-r1/work/konqueror-4.9.2/konqueror/settings/kio/kcookiespolicies.cpp: At global scope:
/var/tmp/portage/kde-base/konqueror-4.9.2-r1/work/konqueror-4.9.2/konqueror/settings/kio/kcookiespolicies.cpp:66:19: warning: ‘QByteArray tolerantToAce(const QString&)’ defined but not used [-Wunused-function]
make[2]: *** [konqueror/settings/kio/CMakeFiles/kcm_kio.dir/kcookiespolicies.o] Error 1
make[2]: Leaving directory `/var/tmp/portage/kde-base/konqueror-4.9.2-r1/work/konqueror-4.9.2_build'
make[1]: *** [konqueror/settings/kio/CMakeFiles/kcm_kio.dir/all] Error 2
make[1]: Leaving directory `/var/tmp/portage/kde-base/konqueror-4.9.2-r1/work/konqueror-4.9.2_build'
make: *** [all] Error 2

Created attachment 74530 [details]
proposed patch for 4.9 branch v2

This one fixes the bug.

Thank you.

Any chance of sneaking in the proposed 4.9 patch for 4.9.3?

Created attachment 74901 [details]
New crash information added by DrKonqi

kcmshell4 () on KDE Platform 4.9.2 using Qt 4.8.3

- What I was doing when the application crashed:

Crash happens in Rekonq as well (though not in the browser, as with Konqueror). Here I'm adding a new cookie policy.

-- Backtrace (Reduced):
#6  0x00007fe2a5be1404 in text (column=0, this=0xf10690) at /usr/include/qt4/QtGui/qtreewidget.h:110
#7  KCookiesPolicies::save (this=0xbfa670) at ../../../../konqueror/settings/kio/kcookiespolicies.cpp:391
#8  0x00007fe2a5bdf071 in KCookiesMain::save (this=0xceef30) at ../../../../konqueror/settings/kio/kcookiesmain.cpp:70
#9  0x00007fe2b66174a7 in KCModuleProxy::save (this=<optimized out>) at ../../kutils/kcmoduleproxy.cpp:279
#10 0x00007fe2b6614e20 in KCMultiDialogPrivate::apply (this=<optimized out>) at ../../kutils/kcmultidialog.cpp:300

Git commit 71f411a4ee7ba98843b9af81f327b67f8294087f by Dawit Alemayehu.
Committed on 10/11/2012 at 22:37.
Pushed by adawit into branch 'KDE/4.9'.

Do not crash when global policy is changed and the Apply button is pressed.
FIXED-IN: 4.9.4

M  +20   -23   konqueror/settings/kio/kcookiespolicies.cpp
M  +1    -1    konqueror/settings/kio/kcookiespolicies.h

http://commits.kde.org/kde-baseapps/71f411a4ee7ba98843b9af81f327b67f8294087f

*** Bug 310224 has been marked as a duplicate of this bug. ***

*** Bug 310828 has been marked as a duplicate of this bug. ***