192714 2009-05-14 22:40:16 +0000 calling org.kde.KIO.Scheduler.reparseSlaveConfiguration via dbus crashes whole system 2010-09-09 00:51:15 +0000 1 1 10 Unmaintained kio general unspecified Ubuntu Unspecified RESOLVED DUPLICATE 226721 NOR crash --- 0 Ronny.Standtke faure ahartmetz andresbajotierra 0 oldest_to_newest 757433 0 Ronny.Standtke 2009-05-14 22:40:16 +0000 Version: (using KDE 4.2.2) Installed from: Ubuntu Packages In the good old days of KDE 3 it was possible to trigger reparsing of KIO http configuration with the following call: $ dcop <program> KIO::Scheduler reparseSlaveConfiguration http Now that I migrated to KDE 4 I wanted to do the same. DCOP is gone, so I spend some time figuring out what I had to do. I learned that I can use qdbus to get a list of valid destinations and can use dbus-send to send a signal. Example: ---------------- $ qdbus | grep konqueror org.kde.konqueror-8084 $ dbus-send --session --dest=org.kde.konqueror-8084 /KIO/Scheduler org.kde.KIO.Scheduler.reparseSlaveConfiguration ---------------- Unfortunately, executing the last statement crashed many parts of KDE. Plasma, Krunner, Akregator, Konqueror, ... everything crashed at the same time. Here is a backtrace of the konqueror crash: ---------------- [Thread debugging using libthread_db enabled] [New Thread 0xb5eb6b50 (LWP 7798)] 0xb8024430 in __kernel_vsyscall () [Current thread is 0 (process 7798)] Thread 1 (Thread 0xb5eb6b50 (LWP 7798)): #0 0xb8024430 in __kernel_vsyscall () #1 0xb64e7780 in __nanosleep_nocancel () from /lib/tls/i686/cmov/libc.so.6 #2 0xb64e75be in __sleep (seconds=0) at ../sysdeps/unix/sysv/linux/sleep.c:138 #3 0xb795c8b2 in ?? () from /usr/lib/libkdeui.so.5 #4 0xb795d274 in KCrash::defaultCrashHandler () from /usr/lib/libkdeui.so.5 #5 <signal handler called> #6 0xb7367907 in QVariant::userType () from /usr/lib/libQtCore.so.4 #7 0xb7457391 in ?? () from /usr/lib/libQtDBus.so.4 #8 0xb745e479 in ?? () from /usr/lib/libQtDBus.so.4 #9 0xb745e624 in ?? () from /usr/lib/libQtDBus.so.4 #10 0xb7464663 in ?? () from /usr/lib/libQtDBus.so.4 #11 0xb7468582 in ?? () from /usr/lib/libQtDBus.so.4 #12 0xb5c9e0d5 in dbus_connection_dispatch () from /lib/libdbus-1.so.3 #13 0xb7457406 in ?? () from /usr/lib/libQtDBus.so.4 #14 0xb745756f in ?? () from /usr/lib/libQtDBus.so.4 #15 0xb749cc2c in ?? () from /usr/lib/libQtDBus.so.4 #16 0xb735eca8 in QMetaObject::activate () from /usr/lib/libQtCore.so.4 #17 0xb735f932 in QMetaObject::activate () from /usr/lib/libQtCore.so.4 #18 0xb739a5a3 in QSocketNotifier::activated () from /usr/lib/libQtCore.so.4 #19 0xb73639a7 in QSocketNotifier::event () from /usr/lib/libQtCore.so.4 #20 0xb694ff2c in QApplicationPrivate::notify_helper (this=0x89313b8, receiver=0x89bbaf8, e=0xbfb41db0) at kernel/qapplication.cpp:4084 #21 0xb695822e in QApplication::notify (this=0xbfb421d8, receiver=0x89bbaf8, e=0xbfb41db0) at kernel/qapplication.cpp:3631 #22 0xb78ec94d in KApplication::notify () from /usr/lib/libkdeui.so.5 #23 0xb7348a3b in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4 #24 0xb73746ca in ?? () from /usr/lib/libQtCore.so.4 #25 0xb621fb88 in IA__g_main_context_dispatch (context=0x8933690) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:1814 #26 0xb62230eb in g_main_context_iterate (context=0x8933690, block=1, dispatch=1, self=0x89315d0) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:2448 #27 0xb6223268 in IA__g_main_context_iteration (context=0x8933690, may_block=1) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:2511 #28 0xb7374438 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4 #29 0xb69f13f5 in QGuiEventDispatcherGlib::processEvents (this=0x891e7c0, flags={i = -1078714568}) at kernel/qguieventdispatcher_glib.cpp:202 #30 0xb734706a in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4 #31 0xb73474aa in QEventLoop::exec () from /usr/lib/libQtCore.so.4 #32 0xb7349959 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4 #33 0xb694fda7 in QApplication::exec () at kernel/qapplication.cpp:3553 #34 0xb7ff400f in kdemain (argc=2, argv=0xbfb42554) at /build/buildd/kdebase-4.2.2/apps/konqueror/src/konqmain.cpp:257 #35 0x080486f2 in main (argc=1, argv=0x3) at /build/buildd/kdebase-4.2.2/obj-i486-linux-gnu/apps/konqueror/src/konqueror_dummy.cpp:3 #0 0xb8024430 in __kernel_vsyscall () ---------------- I tested with the KDE-4.3 openSuse Live CD and could reproduce the problem even with the latest and greatest Beta. 757434 1 Ronny.Standtke 2009-05-14 22:42:38 +0000 Sorry, I forgot to change the severity to "Crash" and it looks like I can not change this after filing the bug. (Why?) Could someone please change the severity? 757484 2 andresbajotierra 2009-05-15 00:37:09 +0000 What is your Qt4 version and your dbus lib version ? Thanks 757589 3 Ronny.Standtke 2009-05-15 09:17:30 +0000 Sorry, I forgot to mention that I am using Kubuntu-9.04. Here is the requested additional info: $ dpkg -l libqt4-dbus dbus Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Cfg-files/Unpacked/Failed-cfg/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad) ||/ Name Version Description +++-===============-===============-============================================== ii dbus 1.2.12-0ubuntu2 simple interprocess messaging system ii libqt4-dbus 4.5.0-0ubuntu4 Qt 4 D-Bus module 845305 4 Ronny.Standtke 2009-10-15 11:24:59 +0000 I just tested with Kubuntu-9.10 Beta and, unfortunately, the issue is still there. Here is the current version info: $ dpkg -l libqt4-dbus dbus Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Cfg-files/Unpacked/Failed-cfg/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Name Version Description +++-==========================-==========================-==================================================================== ii dbus 1.2.16-0ubuntu8 simple interprocess messaging system ii libqt4-dbus 4.5.3really4.5.2-0ubuntu1 Qt 4 D-Bus module Here is a simple bash script to test the issue: #!/bin/bash KONQUEROR=$(qdbus | grep -m1 konqueror) KONQUEROR=${KONQUEROR## } if [ -z "${KONQUEROR}" ] then echo "No running Konqueror instance found. Please start Konqueror." exit 1 fi dbus-send --session --dest=${KONQUEROR} /KIO/Scheduler org.kde.KIO.Scheduler.reparseSlaveConfiguration 845306 5 37591 Ronny.Standtke 2009-10-15 11:26:59 +0000 Created attachment 37591 bash script that triggers the crash The correct line breaks are not preserved in the comments. Therefore I attach the test script here. Just start Konqueror and then the test script -> the whole KDE 4 desktop crashes... 917198 6 Ronny.Standtke 2010-02-15 12:56:29 +0000 I just tested with KDE 4.4 and reparsing the configuration still crashes the whole desktop. 1016394 7 cfeck 2010-09-09 00:51:15 +0000 *** This bug has been marked as a duplicate of bug 226721 *** 37591 2009-10-15 11:26:59 +0000 2009-10-15 11:26:59 +0000 bash script that triggers the crash crash-kde.sh text/plain 291 Ronny.Standtke IyEvYmluL2Jhc2gKS09OUVVFUk9SPSQocWRidXMgfCBncmVwIC1tMSBrb25xdWVyb3IpCktPTlFV RVJPUj0ke0tPTlFVRVJPUiMjIH0KaWYgWyAteiAiJHtLT05RVUVST1J9IiBdCnRoZW4KCWVjaG8g Ik5vIHJ1bm5pbmcgS29ucXVlcm9yIGluc3RhbmNlIGZvdW5kLiBQbGVhc2Ugc3RhcnQgS29ucXVl cm9yLiIKCWV4aXQgMQpmaQpkYnVzLXNlbmQgLS1zZXNzaW9uIC0tZGVzdD0ke0tPTlFVRVJPUn0g L0tJTy9TY2hlZHVsZXIgb3JnLmtkZS5LSU8uU2NoZWR1bGVyLnJlcGFyc2VTbGF2ZUNvbmZpZ3Vy YXRpb24K