[kde] [Bug 347759] New: Crashed when attempting to make a taskbar entry

Sam Shiell samopn at yahoo.co.uk
Fri May 15 14:11:51 BST 2015 

https://bugs.kde.org/show_bug.cgi?id=347759

            Bug ID: 347759
           Summary: Crashed when attempting to make a taskbar entry
           Product: kde
           Version: unspecified
          Platform: unspecified
                OS: Linux
            Status: UNCONFIRMED
          Keywords: drkonqi
          Severity: crash
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: samopn at yahoo.co.uk

Application: kded5 ()

Qt Version: 5.4.1
Operating System: Linux 3.19.0-16-generic x86_64
Distribution: Ubuntu 15.04

-- Information about the crash:
I had just set notifications to "mark taskbar entry" when the mains power was
unplugged. On unplugging the mains power the crash occurs.

The crash can be reproduced every time.

-- Backtrace:
Application: kded5 (kded5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fcc8a638780 (LWP 2433))]

Thread 11 (Thread 0x7fcc7e57d700 (LWP 2434)):
#0  0x00007fcc89ff88dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fcc84d52b72 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fcc84d5464f in xcb_wait_for_event () from
/usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fcc8a5a8099 in QXcbEventReader::run (this=0x128f810) at
qxcbconnection.cpp:1105
#4  0x00007fcc88302b0e in QThreadPrivate::start (arg=0x128f810) at
thread/qthread_unix.cpp:337
#5  0x00007fcc87d396aa in start_thread (arg=0x7fcc7e57d700) at
pthread_create.c:333
#6  0x00007fcc8a003eed in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7fcc5f5ef700 (LWP 2439)):
#0  0x00007fcc882faa21 in QMutex::lock (this=this at entry=0x1524ee8) at
thread/qmutex.cpp:218
#1  0x00007fcc885995a9 in QMutexLocker (m=0x1524ee8, this=<synthetic pointer>)
at ../../include/QtCore/../../src/corelib/thread/qmutex.h:128
#2  canWaitLocked (this=0x1524ec0) at
../../include/QtCore/5.4.1/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:243
#3  postEventSourcePrepare (timeout=<synthetic pointer>, s=0x7fcc500012d0) at
kernel/qeventdispatcher_glib.cpp:254
#4  postEventSourceCheck (source=0x7fcc500012d0) at
kernel/qeventdispatcher_glib.cpp:264
#5  0x00007fcc8781a8c1 in g_main_context_check () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fcc8781ae60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007fcc8781afcc in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007fcc88599c6c in QEventDispatcherGlib::processEvents
(this=0x7fcc500008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#9  0x00007fcc8853e3e2 in QEventLoop::exec (this=this at entry=0x7fcc5f5eee00,
flags=..., flags at entry=...) at kernel/qeventloop.cpp:204
#10 0x00007fcc882fdb44 in QThread::exec (this=<optimized out>) at
thread/qthread.cpp:503
#11 0x00007fcc677aecf7 in KCupsConnection::run() () from
/usr/lib/x86_64-linux-gnu/libkcupslib.so
#12 0x00007fcc88302b0e in QThreadPrivate::start (arg=0x144ed20) at
thread/qthread_unix.cpp:337
#13 0x00007fcc87d396aa in start_thread (arg=0x7fcc5f5ef700) at
pthread_create.c:333
#14 0x00007fcc8a003eed in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7fcc5edee700 (LWP 2440)):
#0  0x00007fcc8785f7a4 in g_mutex_unlock () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fcc8781a3f0 in g_main_context_prepare () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fcc8781ade8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fcc8781afcc in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fcc88599c6c in QEventDispatcherGlib::processEvents
(this=0x7fcc580008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007fcc8853e3e2 in QEventLoop::exec (this=this at entry=0x7fcc5edede40,
flags=..., flags at entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fcc882fdb44 in QThread::exec (this=<optimized out>) at
thread/qthread.cpp:503
#7  0x00007fcc88302b0e in QThreadPrivate::start (arg=0x1403530) at
thread/qthread_unix.cpp:337
#8  0x00007fcc87d396aa in start_thread (arg=0x7fcc5edee700) at
pthread_create.c:333
#9  0x00007fcc8a003eed in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7fcc4bde2700 (LWP 2460)):
#0  0x00007fcc89ff88dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fcc75894601 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#2  0x00007fcc75885b41 in pa_mainloop_poll () from
/usr/lib/x86_64-linux-gnu/libpulse.so.0
#3  0x00007fcc758861de in pa_mainloop_iterate () from
/usr/lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007fcc75886290 in pa_mainloop_run () from
/usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007fcc75894596 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007fcc74de46c8 in ?? () from
/usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-6.0.so
#7  0x00007fcc87d396aa in start_thread (arg=0x7fcc4bde2700) at
pthread_create.c:333
#8  0x00007fcc8a003eed in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7fcc49be2700 (LWP 2461)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007fcc8785f8ef in g_cond_wait () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fcc5d2ced0d in ?? () from
/usr/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0
#3  0x00007fcc878422e8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fcc87841955 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fcc87d396aa in start_thread (arg=0x7fcc49be2700) at
pthread_create.c:333
#6  0x00007fcc8a003eed in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7fcc48d82700 (LWP 2462)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007fcc8785f8ef in g_cond_wait () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fcc5d2ced0d in ?? () from
/usr/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0
#3  0x00007fcc878422e8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fcc87841955 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fcc87d396aa in start_thread (arg=0x7fcc48d82700) at
pthread_create.c:333
#6  0x00007fcc8a003eed in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7fcc3fffe700 (LWP 2463)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007fcc8785f8ef in g_cond_wait () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fcc5c795032 in ?? () from
/usr/lib/x86_64-linux-gnu/libgstbase-1.0.so.0
#3  0x00007fcc5c796340 in gst_data_queue_pop () from
/usr/lib/x86_64-linux-gnu/libgstbase-1.0.so.0
#4  0x00007fcc4a275201 in ?? () from
/usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstcoreelements.so
#5  0x00007fcc5d2ceb71 in ?? () from
/usr/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0
#6  0x00007fcc878422e8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007fcc87841955 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007fcc87d396aa in start_thread (arg=0x7fcc3fffe700) at
pthread_create.c:333
#9  0x00007fcc8a003eed in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7fcc3f7fd700 (LWP 2464)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007fcc8785f8ef in g_cond_wait () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fcc5c77942d in gst_base_sink_wait_preroll () from
/usr/lib/x86_64-linux-gnu/libgstbase-1.0.so.0
#3  0x00007fcc5c2ab31c in ?? () from
/usr/lib/x86_64-linux-gnu/libgstaudio-1.0.so.0
#4  0x00007fcc5c77b947 in ?? () from
/usr/lib/x86_64-linux-gnu/libgstbase-1.0.so.0
#5  0x00007fcc5c77ce14 in ?? () from
/usr/lib/x86_64-linux-gnu/libgstbase-1.0.so.0
#6  0x00007fcc5d2a0e3f in ?? () from
/usr/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0
#7  0x00007fcc5c78ac04 in ?? () from
/usr/lib/x86_64-linux-gnu/libgstbase-1.0.so.0
#8  0x00007fcc5d2a0e3f in ?? () from
/usr/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0
#9  0x00007fcc5c78ac04 in ?? () from
/usr/lib/x86_64-linux-gnu/libgstbase-1.0.so.0
#10 0x00007fcc5d2a0e3f in ?? () from
/usr/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0
#11 0x00007fcc5c78ac04 in ?? () from
/usr/lib/x86_64-linux-gnu/libgstbase-1.0.so.0
#12 0x00007fcc5d2a0e3f in ?? () from
/usr/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0
#13 0x00007fcc4a278f4e in ?? () from
/usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstcoreelements.so
#14 0x00007fcc5d2ceb71 in ?? () from
/usr/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0
#15 0x00007fcc878422e8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#16 0x00007fcc87841955 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#17 0x00007fcc87d396aa in start_thread (arg=0x7fcc3f7fd700) at
pthread_create.c:333
#18 0x00007fcc8a003eed in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fcc3effc700 (LWP 2465)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007fcc8785f8ef in g_cond_wait () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fcc5d2ced0d in ?? () from
/usr/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0
#3  0x00007fcc878422e8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fcc87841955 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fcc87d396aa in start_thread (arg=0x7fcc3effc700) at
pthread_create.c:333
#6  0x00007fcc8a003eed in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fcc3e7fb700 (LWP 2466)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007fcc8785f8ef in g_cond_wait () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fcc5d2ced0d in ?? () from
/usr/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0
#3  0x00007fcc878422e8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fcc87841955 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fcc87d396aa in start_thread (arg=0x7fcc3e7fb700) at
pthread_create.c:333
#6  0x00007fcc8a003eed in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fcc8a638780 (LWP 2433)):
[KCrash Handler]
#6  operator& (f=Qt::WindowType_Mask, this=<optimized out>) at
../../include/QtCore/../../src/corelib/global/qflags.h:136
#7  windowType (this=<optimized out>) at
../../include/QtWidgets/../../src/widgets/kernel/qwidget.h:744
#8  isWindow (this=<optimized out>) at
../../include/QtWidgets/../../src/widgets/kernel/qwidget.h:752
#9  QWidget::window (this=0x0) at kernel/qwidget.cpp:4279
#10 0x00007fcc7cfdffd5 in topLevelWidget (this=<optimized out>) at
/usr/include/x86_64-linux-gnu/qt5/QtWidgets/qwidget.h:294
#11 NotifyByTaskbar::notify (this=0x1492ab0, notification=0x15443c0,
config=<optimized out>) at ../../src/notifybytaskbar.cpp:44
#12 0x00007fcc7cfc4b6f in KNotificationManager::notify (this=0x7fcc7d1f8e90
<(anonymous namespace)::Q_QGS_s_self::innerFunction()::holder>,
n=n at entry=0x15443c0) at ../../src/knotificationmanager.cpp:177
#13 0x00007fcc7cfc32d8 in KNotification::sendEvent (this=0x15443c0) at
../../src/knotification.cpp:381
#14 0x00007fcc8857273a in QObject::event (this=0x15443c0, e=<optimized out>) at
kernel/qobject.cpp:1245
#15 0x00007fcc899b1b2c in QApplicationPrivate::notify_helper (this=0x1278d20,
receiver=0x15443c0, e=0x155c9f0) at kernel/qapplication.cpp:3720
#16 0x00007fcc899b7000 in QApplication::notify (this=0x7ffd12e68320,
receiver=0x15443c0, e=0x155c9f0) at kernel/qapplication.cpp:3503
#17 0x00007fcc88540c2b in QCoreApplication::notifyInternal
(this=0x7ffd12e68320, receiver=0x15443c0, event=event at entry=0x155c9f0) at
kernel/qcoreapplication.cpp:935
#18 0x00007fcc88542c9b in sendEvent (event=0x155c9f0, receiver=<optimized out>)
at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#19 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver at entry=0x0,
event_type=event_type at entry=0, data=0x1278e90) at
kernel/qcoreapplication.cpp:1552
#20 0x00007fcc88543298 in QCoreApplication::sendPostedEvents
(receiver=receiver at entry=0x0, event_type=event_type at entry=0) at
kernel/qcoreapplication.cpp:1410
#21 0x00007fcc88599843 in postEventSourceDispatch (s=0x12cfee0) at
kernel/qeventdispatcher_glib.cpp:271
#22 0x00007fcc8781ac3d in g_main_context_dispatch () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007fcc8781af20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007fcc8781afcc in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007fcc88599c57 in QEventDispatcherGlib::processEvents (this=0x12c1060,
flags=...) at kernel/qeventdispatcher_glib.cpp:418
#26 0x00007fcc8853e3e2 in QEventLoop::exec (this=this at entry=0x7ffd12e68240,
flags=..., flags at entry=...) at kernel/qeventloop.cpp:204
#27 0x00007fcc8854602c in QCoreApplication::exec () at
kernel/qcoreapplication.cpp:1188
#28 0x00007fcc88ae231c in QGuiApplication::exec () at
kernel/qguiapplication.cpp:1510
#29 0x00007fcc899ad7a5 in QApplication::exec () at kernel/qapplication.cpp:2956
#30 0x00007fcc8a2d4321 in kdemain (argc=1, argv=<optimized out>) at
../../src/kded.cpp:846
#31 0x00007fcc89f1da40 in __libc_start_main (main=0x400720 <main(int, char**)>,
argc=1, argv=0x7ffd12e68488, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7ffd12e68478) at libc-start.c:289
#32 0x0000000000400759 in _start ()

Reported using DrKonqi

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