Bug 213436

Summary: Panel crashed after clicking on a task in taskbar
Product: [Unmaintained] plasma4 Reporter: Sasa Kara <Alexandr.Kara>
Component: generalAssignee: Plasma Bugs List <plasma-bugs-null>
Status: RESOLVED DUPLICATE    
Severity: crash CC: andresbajotierra, aseigo
Priority: NOR    
Version First Reported In: unspecified   
Target Milestone: ---   
Platform: Unlisted Binaries   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Sasa Kara 2009-11-06 17:09:20 UTC 
Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.1 (KDE 4.3.1) "release 6"
Qt Version: 4.5.3
Operating System: Linux 2.6.27.37-0.1-default x86_64
Distribution: "openSUSE 11.2 RC 1 (x86_64)"

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f219e776750 (LWP 3295))]

Thread 7 (Thread 0x7f217ddb0910 (LWP 28285)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007f219e1ed53b in wait (time=<value optimized out>, this=<value optimized out>) at thread/qwaitcondition_unix.cpp:87
#2  QWaitCondition::wait (time=<value optimized out>, this=<value optimized out>) at thread/qwaitcondition_unix.cpp:159
#3  0x00007f219a6c69ec in QHostInfoAgent::run (this=0x1d627e0) at kernel/qhostinfo.cpp:260
#4  0x00007f219e1ec485 in QThreadPrivate::start (arg=0x1d627e0) at thread/qthread_unix.cpp:188
#5  0x00007f219df7865d in start_thread (arg=<value optimized out>) at pthread_create.c:297
#6  0x00007f219b98c14d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 6 (Thread 0x7f2171d37910 (LWP 28303)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:220
#1  0x00007f2176a30631 in ?? () from /usr/lib64/libxine.so.1
#2  0x00007f219df7865d in start_thread (arg=<value optimized out>) at pthread_create.c:297
#3  0x00007f219b98c14d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#4  0x0000000000000000 in ?? ()
The current source language is "auto; currently asm".

Thread 5 (Thread 0x7f216fcb1910 (LWP 28305)):
#0  0x00007f219b983033 in __poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f219b00f58c in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f219b00f8d0 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f219e2fa3f6 in QEventDispatcherGlib::processEvents (this=0x2797db0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:409
#4  0x00007f219e2d0712 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#5  0x00007f219e2d0ae4 in QEventLoop::exec (this=0x7f216fcb1000, flags=) at kernel/qeventloop.cpp:201
#6  0x00007f219e1e971b in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:487
#7  0x00007f2176c8b3f4 in Phonon::MediaSource::type() const () from /usr/lib64/kde4/plugins/phonon_backend/phonon_xine.so
#8  0x00007f219e1ec485 in QThreadPrivate::start (arg=0x27964b0) at thread/qthread_unix.cpp:188
#9  0x00007f219df7865d in start_thread (arg=<value optimized out>) at pthread_create.c:297
#10 0x00007f219b98c14d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f216f2a6910 (LWP 1428)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:220
#1  0x00007f2176a3e6a5 in ?? () from /usr/lib64/libxine.so.1
#2  0x00007f219df7865d in start_thread (arg=<value optimized out>) at pthread_create.c:297
#3  0x00007f219b98c14d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#4  0x0000000000000000 in ?? ()
The current source language is "auto; currently c".

Thread 3 (Thread 0x7f216eaa5910 (LWP 1429)):
#0  0x00007f219df7fabb in read () from /lib64/libpthread.so.0
#1  0x00007f2176efd2f5 in ?? () from /usr/lib64/libasound.so.2
#2  0x00007f2176ef8058 in snd_hctl_handle_events () from /usr/lib64/libasound.so.2
#3  0x00007f2176f01da9 in snd_mixer_handle_events () from /usr/lib64/libasound.so.2
#4  0x00007f216f2aba00 in snd_pcm_sw_params_set_start_threshold () from /usr/lib64/xine/plugins/1.26/xineplug_ao_out_alsa.so
#5  0x00007f219df7865d in start_thread (arg=<value optimized out>) at pthread_create.c:297
#6  0x00007f219b98c14d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()
The current source language is "auto; currently asm".

Thread 2 (Thread 0x7f2170d1c910 (LWP 1430)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007f2176a41c23 in ?? () from /usr/lib64/libxine.so.1
#2  0x00007f219df7865d in start_thread (arg=<value optimized out>) at pthread_create.c:297
#3  0x00007f219b98c14d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#4  0x0000000000000000 in ?? ()
The current source language is "auto; currently c".

Thread 1 (Thread 0x7f219e776750 (LWP 3295)):
[KCrash Handler]
#5  QMutex::lock (this=0xffffff9b008400dd) at thread/qmutex.cpp:152
#6  0x00007f219e2d1ae2 in QCoreApplication::postEvent (receiver=0x3325930, event=0x11c6490, priority=0) at kernel/qcoreapplication.cpp:1020
#7  0x00007f219c140e57 in QX11Data::xdndHandleFinished (this=<value optimized out>, xe=<value optimized out>, passive=<value optimized out>) at kernel/qdnd_x11.cpp:1245
#8  0x00007f219c11ce33 in QApplication::x11ClientMessage (this=<value optimized out>, w=0xb239a0, event=0x0, passive_only=128) at kernel/qapplication_x11.cpp:3131
#9  0x00007f219c12d864 in QApplication::x11ProcessEvent (this=<value optimized out>, event=0x7fffa985a200) at kernel/qapplication_x11.cpp:3682
#10 0x00007f219c155b6c in x11EventSourceDispatch (s=<value optimized out>, callback=<value optimized out>, user_data=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:146
#11 0x00007f219b00bdde in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#12 0x00007f219b00f7a8 in ?? () from /usr/lib64/libglib-2.0.so.0
#13 0x00007f219b00f8d0 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#14 0x00007f219e2fa3a3 in QEventDispatcherGlib::processEvents (this=0x618810, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:407
#15 0x00007f219c15531e in QGuiEventDispatcherGlib::processEvents (this=0xffffff9b008400dd, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#16 0x00007f219e2d0712 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#17 0x00007f219e2d0ae4 in QEventLoop::exec (this=0x7fffa985a530, flags=) at kernel/qeventloop.cpp:201
#18 0x00007f219e2d2c99 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#19 0x00007f2192875d6f in kdemain () from /usr/lib64/libkdeinit4_plasma-desktop.so
#20 0x0000000000406f88 in _start ()
The current source language is "auto; currently asm".
The current source language is "auto; currently c".

Reported using DrKonqi
Comment 1 Aaron J. Seigo 2009-11-06 19:27:34 UTC 
crash in Qt; probably due to the click in the taskbar starting a drag of the button and something going wrong with the drag process.

do you have an autohidden panel?
Comment 2 Sasa Kara 2009-11-08 22:23:20 UTC 
No, I didn't have an autohidden panel. But there was a widget which didn't work properly (Activity Bar) - it didn't paint itself and was eating 100% of one CPU core. But the system was still responsive.

The crash happened when I clicked on a task in the taskbar. When Plasma was reloaded, it worked OK afterwards.
Comment 3 Dario Andres 2009-11-10 00:45:21 UTC 
BTW, the backtrace mostly matches bug 192000 and its duplicates... can you confirm that ?
Thanks
Comment 4 Dario Andres 2009-12-20 20:46:38 UTC 
Waiting for feedback. Marking as NEEDSINFO.
Comment 5 Sasa Kara 2010-01-05 14:33:24 UTC 
I hasn't been able to reproduce the problem since. It is true that it looks similar to bug 192000 - it is probably the same problem. I think it can be closed as a duplicate.
Comment 6 Dario Andres 2010-02-21 16:02:12 UTC 

*** This bug has been marked as a duplicate of bug 192000 ***