[kdelibs] [Bug 312914] New: kscreen-console crashes with seg fault when unloading/loading kscreen kded4 module

Achim Bohnet ach at mpe.mpg.de
Tue Jan 8 22:13:01 GMT 2013 

https://bugs.kde.org/show_bug.cgi?id=312914

            Bug ID: 312914
           Summary: kscreen-console crashes with seg fault when
                    unloading/loading  kscreen kded4 module
    Classification: Unclassified
           Product: kdelibs
           Version: unspecified
          Hardware: Compiled Sources
                OS: Linux
            Status: CONFIRMED
          Severity: crash
          Priority: NOR
         Component: kded
          Assignee: unassigned-bugs at kde.org
          Reporter: ach at mpe.mpg.de

Application: kded4 ($Id$)
KDE Platform Version: 4.9.97 (Compiled from sources)
Qt Version: 4.8.3
Operating System: Linux 3.5.0-21-generic x86_64
Distribution: Ubuntu 12.10

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

I was running in a terminal  kscreen-console while in another terminal

./kde-reset-kded 
qdbus org.kde.kded /kded org.kde.kded.unloadModule randrmonitor
false
qdbus org.kde.kded /kded org.kde.kded.setModuleAutoloading randrmonitor false


qdbus org.kde.kded /kded org.kde.kded.unloadModule kscreen
true
qdbus org.kde.kded /kded org.kde.kded.setModuleAutoloading kscreen true

qdbus org.kde.kded /kded org.kde.kded.loadModule kscreen
Error: org.freedesktop.DBus.Error.NoReply
Message did not receive a reply (timeout by message bus)

-- Backtrace:
Application: KDE Dæmon (kdeinit4), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f5ed377a780 (LWP 10668))]

Thread 6 (Thread 0x7f5ebb3c8700 (LWP 10678)):
#0  0x00007f5ed614cfc0 in __pthread_mutex_lock (mutex=0x7f5eac000a60) at
pthread_mutex_lock.c:113
#1  0x00007f5ed58aee21 in g_mutex_lock () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5ed5871623 in g_main_context_prepare () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5ed5871cab in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f5ed5871ea4 in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f5ed9da1c16 in QEventDispatcherGlib::processEvents
(this=0x7f5eac0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007f5ed9d722bf in QEventLoop::processEvents
(this=this at entry=0x7f5ebb3c7dd0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f5ed9d72548 in QEventLoop::exec (this=0x7f5ebb3c7dd0, flags=...) at
kernel/qeventloop.cpp:204
#8  0x00007f5ed9c73b10 in QThread::exec (this=<optimized out>) at
thread/qthread.cpp:501
#9  0x00007f5ed9d529af in QInotifyFileSystemWatcherEngine::run (this=0x2609850)
at io/qfilesystemwatcher_inotify.cpp:248
#10 0x00007f5ed9c76aec in QThreadPrivate::start (arg=0x2609850) at
thread/qthread_unix.cpp:338
#11 0x00007f5ed614ae9a in start_thread (arg=0x7f5ebb3c8700) at
pthread_create.c:308
#12 0x00007f5ed8980cbd in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7f5eabdf9700 (LWP 10691)):
#0  0x00007f5ed58aee21 in g_mutex_lock () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f5ed5871623 in g_main_context_prepare () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5ed5871cab in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5ed5871ea4 in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f5ed9da1c16 in QEventDispatcherGlib::processEvents
(this=0x7f5e9c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#5  0x00007f5ed9d722bf in QEventLoop::processEvents
(this=this at entry=0x7f5eabdf8e00, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f5ed9d72548 in QEventLoop::exec (this=0x7f5eabdf8e00, flags=...) at
kernel/qeventloop.cpp:204
#7  0x00007f5ed9c73b10 in QThread::exec (this=<optimized out>) at
thread/qthread.cpp:501
#8  0x00007f5ed9c76aec in QThreadPrivate::start (arg=0x29c8c40) at
thread/qthread_unix.cpp:338
#9  0x00007f5ed614ae9a in start_thread (arg=0x7f5eabdf9700) at
pthread_create.c:308
#10 0x00007f5ed8980cbd in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f5eab5f8700 (LWP 10692)):
#0  0x00007f5ed614e05d in __pthread_mutex_unlock_usercnt (mutex=<optimized
out>, decr=<optimized out>) at pthread_mutex_unlock.c:52
#1  __pthread_mutex_unlock (mutex=0x7f5ea4000a60) at pthread_mutex_unlock.c:290
#2  0x00007f5ed58aee51 in g_mutex_unlock () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5ed5871884 in g_main_context_check () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f5ed5871d22 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f5ed5871ea4 in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f5ed9da1c16 in QEventDispatcherGlib::processEvents
(this=0x7f5ea40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#7  0x00007f5ed9d722bf in QEventLoop::processEvents
(this=this at entry=0x7f5eab5f7e00, flags=...) at kernel/qeventloop.cpp:149
#8  0x00007f5ed9d72548 in QEventLoop::exec (this=0x7f5eab5f7e00, flags=...) at
kernel/qeventloop.cpp:204
#9  0x00007f5ed9c73b10 in QThread::exec (this=<optimized out>) at
thread/qthread.cpp:501
#10 0x00007f5ed9c76aec in QThreadPrivate::start (arg=0x299fd10) at
thread/qthread_unix.cpp:338
#11 0x00007f5ed614ae9a in start_thread (arg=0x7f5eab5f8700) at
pthread_create.c:308
#12 0x00007f5ed8980cbd in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f5ea3fff700 (LWP 10738)):
#0  0x00007f5ed8975303 in __GI___poll (fds=<optimized out>, nfds=<optimized
out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f5ed5871d84 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5ed5871ea4 in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5ed9da1c16 in QEventDispatcherGlib::processEvents
(this=0x7f5e980008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f5ed9d722bf in QEventLoop::processEvents
(this=this at entry=0x7f5ea3ffedd0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f5ed9d72548 in QEventLoop::exec (this=0x7f5ea3ffedd0, flags=...) at
kernel/qeventloop.cpp:204
#6  0x00007f5ed9c73b10 in QThread::exec (this=<optimized out>) at
thread/qthread.cpp:501
#7  0x00007f5ed9d529af in QInotifyFileSystemWatcherEngine::run (this=0x2596830)
at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f5ed9c76aec in QThreadPrivate::start (arg=0x2596830) at
thread/qthread_unix.cpp:338
#9  0x00007f5ed614ae9a in start_thread (arg=0x7f5ea3fff700) at
pthread_create.c:308
#10 0x00007f5ed8980cbd in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f5ebbbc9700 (LWP 13859)):
#0  0x00007f5ed614cf69 in __pthread_mutex_lock (mutex=0x7f5eb40028c0) at
pthread_mutex_lock.c:92
#1  0x00007f5ed58aee21 in g_mutex_lock () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5ed58716eb in g_main_context_query () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5ed5871cf9 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f5ed5871ea4 in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f5ed9da1c16 in QEventDispatcherGlib::processEvents
(this=0x7f5eb4003500, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007f5ed9d722bf in QEventLoop::processEvents
(this=this at entry=0x7f5ebbbc8e00, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f5ed9d72548 in QEventLoop::exec (this=0x7f5ebbbc8e00, flags=...) at
kernel/qeventloop.cpp:204
#8  0x00007f5ed9c73b10 in QThread::exec (this=<optimized out>) at
thread/qthread.cpp:501
#9  0x00007f5ed9c76aec in QThreadPrivate::start (arg=0x2cbb360) at
thread/qthread_unix.cpp:338
#10 0x00007f5ed614ae9a in start_thread (arg=0x7f5ebbbc9700) at
pthread_create.c:308
#11 0x00007f5ed8980cbd in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f5ed377a780 (LWP 10668)):
[KCrash Handler]
#6  0x00007f5ed9d8cbd8 in QObject::connect (sender=0x25ab360,
signal=0x7f5ebfd36020 "2ready()", receiver=0x2533330, method=0x7f5ebfd36018
"1init()", type=Qt::AutoConnection) at kernel/qobject.cpp:2551
#7  0x00007f5ebfd2c848 in connect (atype=Qt::AutoConnection,
amember=0x7f5ebfd36018 "1init()", asignal=0x7f5ebfd36020 "2ready()",
asender=<optimized out>, this=0x2533330) at
/usr/include/qt4/QtCore/qobject.h:339
#8  KScreenDaemon::KScreenDaemon (this=0x2533330, parent=<optimized out>) at
/home/allee/Sources/kscreen-ng/kscreen-0.0+git2013010801/kded/daemon.cpp:59
#9  0x00007f5ebfd2c957 in KPluginFactory::createInstance<KScreenDaemon,
QObject> (parentWidget=<optimized out>, parent=<optimized out>, args=...) at
/usr/include/KDE/../kpluginfactory.h:477
#10 0x00007f5eda2ce7c5 in KPluginFactory::create (this=0x2544c80,
iface=0x7f5eda3251c0 <qt_meta_stringdata_KDEDModule> "KDEDModule",
parentWidget=0x0, parent=0x2380110, args=..., keyword=...) at
../../kdecore/util/kpluginfactory.cpp:203
#11 0x00007f5ec6730cd7 in create<KDEDModule> (args=..., parent=0x2380110,
this=<optimized out>) at ../../kdecore/util/kpluginfactory.h:507
#12 Kded::loadModule (this=this at entry=0x2380110, s=...,
onDemand=onDemand at entry=false) at ../../kded/kded.cpp:409
#13 0x00007f5ec67315bb in Kded::loadModule (this=0x2380110, obj=...,
onDemand=<optimized out>) at ../../kded/kded.cpp:361
#14 0x00007f5ec6734585 in KdedAdaptor::loadModule (this=<optimized out>,
module=...) at ../../kded/kdedadaptor.cpp:44
#15 0x00007f5ec673488e in qt_static_metacall (_a=<optimized out>,
_id=<optimized out>, _o=<optimized out>, _c=<optimized out>) at
./kdedadaptor.moc:70
#16 KdedAdaptor::qt_static_metacall (_o=<optimized out>, _c=<optimized out>,
_id=<optimized out>, _a=<optimized out>) at ./kdedadaptor.moc:64
#17 0x00007f5ec673499b in KdedAdaptor::qt_metacall (this=0x23875b0,
_c=QMetaObject::InvokeMetaMethod, _id=<optimized out>, _a=0x7fff81fc2260) at
./kdedadaptor.moc:124
#18 0x00007f5ed70eaed3 in QDBusConnectionPrivate::deliverCall
(this=this at entry=0x237c410, object=object at entry=0x23875b0, msg=...,
metaTypes=..., slotIdx=4) at qdbusintegrator.cpp:947
#19 0x00007f5ed70ebfd5 in QDBusConnectionPrivate::activateCall
(this=this at entry=0x237c410, object=0x23875b0, flags=flags at entry=273, msg=...)
at qdbusintegrator.cpp:857
#20 0x00007f5ed70ec94f in QDBusConnectionPrivate::activateObject
(this=0x237c410, node=..., msg=..., pathStartPos=<optimized out>) at
qdbusintegrator.cpp:1423
#21 0x00007f5ed70eca2b in QDBusActivateObjectEvent::placeMetaCall
(this=0x2d4f9f0) at qdbusintegrator.cpp:1537
#22 0x00007f5ed9d8843e in QObject::event (this=0x2380110, e=<optimized out>) at
kernel/qobject.cpp:1195
#23 0x00007f5ed911ae9c in QApplicationPrivate::notify_helper
(this=this at entry=0x2388430, receiver=receiver at entry=0x2380110,
e=e at entry=0x2d4f9f0) at kernel/qapplication.cpp:4562
#24 0x00007f5ed911f30a in QApplication::notify (this=0x7fff81fc3040,
receiver=0x2380110, e=0x2d4f9f0) at kernel/qapplication.cpp:4423
#25 0x00007f5edaaec626 in KApplication::notify (this=0x7fff81fc3040,
receiver=0x2380110, event=0x2d4f9f0) at ../../kdeui/kernel/kapplication.cpp:311
#26 0x00007f5ed9d7356e in QCoreApplication::notifyInternal
(this=0x7fff81fc3040, receiver=receiver at entry=0x2380110,
event=event at entry=0x2d4f9f0) at kernel/qcoreapplication.cpp:915
#27 0x00007f5ed9d773f1 in sendEvent (event=0x2d4f9f0, receiver=0x2380110) at
../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#28 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0,
data=0x22f32b0) at kernel/qcoreapplication.cpp:1539
#29 0x00007f5ed9da1a63 in sendPostedEvents () at
../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#30 postEventSourceDispatch (s=0x2389ac0) at
kernel/qeventdispatcher_glib.cpp:279
#31 0x00007f5ed5871ab5 in g_main_context_dispatch () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#32 0x00007f5ed5871de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#33 0x00007f5ed5871ea4 in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#34 0x00007f5ed9da1bf6 in QEventDispatcherGlib::processEvents (this=0x22f57d0,
flags=...) at kernel/qeventdispatcher_glib.cpp:424
#35 0x00007f5ed91bfc1e in QGuiEventDispatcherGlib::processEvents
(this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#36 0x00007f5ed9d722bf in QEventLoop::processEvents
(this=this at entry=0x7fff81fc2dc0, flags=...) at kernel/qeventloop.cpp:149
#37 0x00007f5ed9d72548 in QEventLoop::exec (this=0x7fff81fc2dc0, flags=...) at
kernel/qeventloop.cpp:204
#38 0x00007f5ed9d77708 in QCoreApplication::exec () at
kernel/qcoreapplication.cpp:1187
#39 0x00007f5ec67303f0 in kdemain (argc=1, argv=0x236a2f0) at
../../kded/kded.cpp:924
#40 0x00000000004084c6 in launch (argc=argc at entry=1, _name=_name at entry=0x40b127
"kded4", args=args at entry=0x0, cwd=cwd at entry=0x0, envc=envc at entry=0,
envs=<optimized out>, envs at entry=0x0, reset_env=reset_env at entry=false,
tty=tty at entry=0x0, avoid_loops=avoid_loops at entry=false,
startup_id_str=startup_id_str at entry=0x40afb6 "0") at ../../kinit/kinit.cpp:738
#41 0x0000000000405a29 in main (argc=4, argv=<optimized out>,
envp=0x7fff81fc3a40) at ../../kinit/kinit.cpp:1853

Reported using DrKonqi

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