Bug 351030

Summary: Quickly switching virtual desktops crashes plasma
Product: [Plasma] plasmashell Reporter: quazgar <quazgar>
Component: generalAssignee: David Edmundson <kde>
Status: RESOLVED DUPLICATE    
Severity: crash CC: bhush94, plasma-bugs
Priority: NOR Keywords: drkonqi
Version: 5.3.2   
Target Milestone: 1.0   
Platform: Debian testing   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description quazgar 2015-08-06 10:59:58 UTC 
Application: plasmashell (5.3.2)

Qt Version: 5.4.2
Operating System: Linux 4.0.0-2-amd64 x86_64
Distribution: Debian GNU/Linux testing (stretch)

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

I clicked on a link in KMail (4.14), which was immediately opened in Firefox on another desktop (desktop 1).  Because I anticipated this and first wanted to continue reading the email, I immediately switched back to the desktop with KMail (desktop 2) using the shortcut (Meta-Right) to switch to the desktop to the right.

This caused plasma to segfault (see backtrace) a very short time (maybe 100-300ms) after desktop 2 was fully visible again.  I was able to reproduce the problem several times.

- Custom settings of the application:

If relevant: The desktop switching animation is set to "Slide".

The crash can be reproduced sometimes.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f9f7b55b940 (LWP 3528))]

Thread 21 (Thread 0x7f9f64d4a700 (LWP 3545)):
#0  0x00007f9f7615b53d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f9f7a1c6252 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f9f7a1c7ddf in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f9f66efaaa9 in QXcbEventReader::run (this=0x2298090) at qxcbconnection.cpp:1105
#4  0x00007f9f767d687e in QThreadPrivate::start (arg=0x2298090) at thread/qthread_unix.cpp:337
#5  0x00007f9f757540a4 in start_thread (arg=0x7f9f64d4a700) at pthread_create.c:309
#6  0x00007f9f7616407d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 20 (Thread 0x7f9f5e8ac700 (LWP 3562)):
#0  0x00007f9f7615b53d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f9f72ce7ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9f72ce7fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9f76a1f35c in QEventDispatcherGlib::processEvents (this=0x7f9f580008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f9f769c3b62 in QEventLoop::exec (this=this@entry=0x7f9f5e8abc60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f9f767d18b4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f9f7905ff05 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f9f767d687e in QThreadPrivate::start (arg=0x235ed90) at thread/qthread_unix.cpp:337
#8  0x00007f9f757540a4 in start_thread (arg=0x7f9f5e8ac700) at pthread_create.c:309
#9  0x00007f9f7616407d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 19 (Thread 0x7f9f56fe6700 (LWP 3564)):
#0  0x00007ffebe7c9d18 in clock_gettime ()
#1  0x00007f9f76170ccd in __GI___clock_gettime (clock_id=<optimized out>, tp=<optimized out>) at ../sysdeps/unix/clock_gettime.c:115
#2  0x00007f9f7688ca76 in qt_clock_gettime (ts=0x7f9f56fe59c0, clock=<optimized out>) at tools/qelapsedtimer_unix.cpp:105
#3  do_gettime (frac=<synthetic pointer>, sec=<synthetic pointer>) at tools/qelapsedtimer_unix.cpp:161
#4  qt_gettime () at tools/qelapsedtimer_unix.cpp:170
#5  0x00007f9f76a1cd29 in QTimerInfoList::updateCurrentTime (this=this@entry=0x7f9f50002cd0) at kernel/qtimerinfo_unix.cpp:84
#6  0x00007f9f76a1d295 in QTimerInfoList::timerWait (this=0x7f9f50002cd0, tm=...) at kernel/qtimerinfo_unix.cpp:379
#7  0x00007f9f76a1e72e in timerSourcePrepareHelper (timeout=0x7f9f56fe5a94, src=<optimized out>) at kernel/qeventdispatcher_glib.cpp:127
#8  timerSourcePrepare (source=<optimized out>, timeout=0x7f9f56fe5a94) at kernel/qeventdispatcher_glib.cpp:160
#9  0x00007f9f72ce73fd in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007f9f72ce7de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007f9f72ce7fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007f9f76a1f35c in QEventDispatcherGlib::processEvents (this=0x7f9f500008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#13 0x00007f9f769c3b62 in QEventLoop::exec (this=this@entry=0x7f9f56fe5c60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#14 0x00007f9f767d18b4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#15 0x00007f9f7905ff05 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#16 0x00007f9f767d687e in QThreadPrivate::start (arg=0x2552930) at thread/qthread_unix.cpp:337
#17 0x00007f9f757540a4 in start_thread (arg=0x7f9f56fe6700) at pthread_create.c:309
#18 0x00007f9f7616407d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 18 (Thread 0x7f9f54d88700 (LWP 3568)):
#0  0x00007f9f7615b53d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f9f72ce7ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9f72ce7fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9f76a1f35c in QEventDispatcherGlib::processEvents (this=0x7f9f4c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f9f769c3b62 in QEventLoop::exec (this=this@entry=0x7f9f54d87c60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f9f767d18b4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f9f7905ff05 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f9f767d687e in QThreadPrivate::start (arg=0x28c6da0) at thread/qthread_unix.cpp:337
#8  0x00007f9f757540a4 in start_thread (arg=0x7f9f54d88700) at pthread_create.c:309
#9  0x00007f9f7616407d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 17 (Thread 0x7f9f477ff700 (LWP 3569)):
#0  0x00007f9f7615b53d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f9f72ce7ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9f72ce7fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9f76a1f35c in QEventDispatcherGlib::processEvents (this=0x7f9f400008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f9f769c3b62 in QEventLoop::exec (this=this@entry=0x7f9f477fec60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f9f767d18b4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f9f7905ff05 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f9f767d687e in QThreadPrivate::start (arg=0x29c2020) at thread/qthread_unix.cpp:337
#8  0x00007f9f757540a4 in start_thread (arg=0x7f9f477ff700) at pthread_create.c:309
#9  0x00007f9f7616407d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 16 (Thread 0x7f9f467fe700 (LWP 3580)):
#0  0x00007f9f72d2c734 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9f72ce73f0 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9f72ce7de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9f72ce7fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9f76a1f35c in QEventDispatcherGlib::processEvents (this=0x7f9f380008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f9f769c3b62 in QEventLoop::exec (this=this@entry=0x7f9f467fdc60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f9f767d18b4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f9f7905ff05 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f9f767d687e in QThreadPrivate::start (arg=0x2ac87a0) at thread/qthread_unix.cpp:337
#9  0x00007f9f757540a4 in start_thread (arg=0x7f9f467fe700) at pthread_create.c:309
#10 0x00007f9f7616407d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 15 (Thread 0x7f9f457fd700 (LWP 3581)):
#0  0x00007f9f7615b53d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f9f72ce7ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9f72ce7fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9f76a1f35c in QEventDispatcherGlib::processEvents (this=0x7f9f3c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f9f769c3b62 in QEventLoop::exec (this=this@entry=0x7f9f457fcc60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f9f767d18b4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f9f7905ff05 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f9f767d687e in QThreadPrivate::start (arg=0x2bbf620) at thread/qthread_unix.cpp:337
#8  0x00007f9f757540a4 in start_thread (arg=0x7f9f457fd700) at pthread_create.c:309
#9  0x00007f9f7616407d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 14 (Thread 0x7f9f37fff700 (LWP 3582)):
#0  0x00007f9f72d2c732 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9f72ce7d6d in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9f72ce7fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9f76a1f35c in QEventDispatcherGlib::processEvents (this=0x7f9f300008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f9f769c3b62 in QEventLoop::exec (this=this@entry=0x7f9f37ffec60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f9f767d18b4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f9f7905ff05 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f9f767d687e in QThreadPrivate::start (arg=0x2cb84f0) at thread/qthread_unix.cpp:337
#8  0x00007f9f757540a4 in start_thread (arg=0x7f9f37fff700) at pthread_create.c:309
#9  0x00007f9f7616407d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 13 (Thread 0x7f9f36ffe700 (LWP 3583)):
#0  0x00007f9f72d2c734 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9f72ce78b9 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9f72ce7e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9f72ce7fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9f76a1f35c in QEventDispatcherGlib::processEvents (this=0x7f9f280008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f9f769c3b62 in QEventLoop::exec (this=this@entry=0x7f9f36ffdc60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f9f767d18b4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f9f7905ff05 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f9f767d687e in QThreadPrivate::start (arg=0x2dbc230) at thread/qthread_unix.cpp:337
#9  0x00007f9f757540a4 in start_thread (arg=0x7f9f36ffe700) at pthread_create.c:309
#10 0x00007f9f7616407d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 12 (Thread 0x7f9f35ffd700 (LWP 3591)):
#0  0x00007f9f72d2c734 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9f72ce78b9 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9f72ce7e60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9f72ce7fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9f76a1f35c in QEventDispatcherGlib::processEvents (this=0x7f9f2c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f9f769c3b62 in QEventLoop::exec (this=this@entry=0x7f9f35ffcc60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f9f767d18b4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f9f7905ff05 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f9f767d687e in QThreadPrivate::start (arg=0x2eaee40) at thread/qthread_unix.cpp:337
#9  0x00007f9f757540a4 in start_thread (arg=0x7f9f35ffd700) at pthread_create.c:309
#10 0x00007f9f7616407d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 11 (Thread 0x7f9f34df4700 (LWP 3597)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f9f7afcc644 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f9f7afcc689 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f9f757540a4 in start_thread (arg=0x7f9f34df4700) at pthread_create.c:309
#4  0x00007f9f7616407d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 10 (Thread 0x7f9ea7fff700 (LWP 3600)):
#0  0x00007f9f7615b53d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f9f72ce7ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9f72ce7fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9f76a1f35c in QEventDispatcherGlib::processEvents (this=0x7f9ea00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f9f769c3b62 in QEventLoop::exec (this=this@entry=0x7f9ea7ffec60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f9f767d18b4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f9f7905ff05 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f9f767d687e in QThreadPrivate::start (arg=0x2faa550) at thread/qthread_unix.cpp:337
#8  0x00007f9f757540a4 in start_thread (arg=0x7f9ea7fff700) at pthread_create.c:309
#9  0x00007f9f7616407d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 9 (Thread 0x7f9ea4817700 (LWP 3602)):
#0  0x00007f9f72d2c734 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9f72ce73f0 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9f72ce7de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9f72ce7fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9f76a1f35c in QEventDispatcherGlib::processEvents (this=0x7f9e980008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f9f769c3b62 in QEventLoop::exec (this=this@entry=0x7f9ea4816c10, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f9f767d18b4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f9f794dda16 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007f9f767d687e in QThreadPrivate::start (arg=0x354ce40) at thread/qthread_unix.cpp:337
#9  0x00007f9f757540a4 in start_thread (arg=0x7f9ea4817700) at pthread_create.c:309
#10 0x00007f9f7616407d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 8 (Thread 0x7f9e9f815700 (LWP 3629)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f9f767d79db in wait (time=18446744073709551615, this=0x35bc9f0) at thread/qwaitcondition_unix.cpp:136
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x35be910, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#3  0x00007f9f7954ff2b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007f9f79550320 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f9f767d687e in QThreadPrivate::start (arg=0x35be890) at thread/qthread_unix.cpp:337
#6  0x00007f9f757540a4 in start_thread (arg=0x7f9e9f815700) at pthread_create.c:309
#7  0x00007f9f7616407d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 7 (Thread 0x7f9e93fff700 (LWP 3630)):
#0  0x00007f9f72d2c734 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9f72ce76f9 in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9f72ce7e37 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9f72ce7fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9f76a1f35c in QEventDispatcherGlib::processEvents (this=0x7f9e8c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f9f769c3b62 in QEventLoop::exec (this=this@entry=0x7f9e93ffec60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f9f767d18b4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f9f7905ff05 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f9f767d687e in QThreadPrivate::start (arg=0x385fde0) at thread/qthread_unix.cpp:337
#9  0x00007f9f757540a4 in start_thread (arg=0x7f9e93fff700) at pthread_create.c:309
#10 0x00007f9f7616407d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 6 (Thread 0x7f9e90baf700 (LWP 3675)):
#0  0x00007f9f72d2c719 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9f72ce6f38 in g_main_context_release () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9f72ce7e76 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9f72ce7fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9f76a1f35c in QEventDispatcherGlib::processEvents (this=0x7f9e840008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#5  0x00007f9f769c3b62 in QEventLoop::exec (this=this@entry=0x7f9e90baec60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f9f767d18b4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f9f7905ff05 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f9f767d687e in QThreadPrivate::start (arg=0x3ce2300) at thread/qthread_unix.cpp:337
#9  0x00007f9f757540a4 in start_thread (arg=0x7f9e90baf700) at pthread_create.c:309
#10 0x00007f9f7616407d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 5 (Thread 0x7f9e8a352700 (LWP 3705)):
#0  0x00007f9f7615b53d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f9f72ce7ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9f72ce7fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9f76a1f35c in QEventDispatcherGlib::processEvents (this=0x7f9e800008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f9f769c3b62 in QEventLoop::exec (this=this@entry=0x7f9e8a351c60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f9f767d18b4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f9f7905ff05 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f9f767d687e in QThreadPrivate::start (arg=0x407fa90) at thread/qthread_unix.cpp:337
#8  0x00007f9f757540a4 in start_thread (arg=0x7f9e8a352700) at pthread_create.c:309
#9  0x00007f9f7616407d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7f9e88daa700 (LWP 3718)):
#0  __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1  0x00007f9f757581a4 in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:327
#2  0x00007f9f767d79db in wait (time=18446744073709551615, this=0x448e270) at thread/qwaitcondition_unix.cpp:136
#3  QWaitCondition::wait (this=<optimized out>, mutex=0x4491e60, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#4  0x00007f9f7954ff2b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f9f79550320 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007f9f767d687e in QThreadPrivate::start (arg=0x4491de0) at thread/qthread_unix.cpp:337
#7  0x00007f9f757540a4 in start_thread (arg=0x7f9e88daa700) at pthread_create.c:309
#8  0x00007f9f7616407d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7f9e7ffff700 (LWP 3719)):
#0  0x00007f9f7615b53d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f9f72ce7ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9f72ce7fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9f76a1f35c in QEventDispatcherGlib::processEvents (this=0x7f9e740008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007f9f769c3b62 in QEventLoop::exec (this=this@entry=0x7f9e7fffec60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f9f767d18b4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f9f7905ff05 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f9f767d687e in QThreadPrivate::start (arg=0x2e10170) at thread/qthread_unix.cpp:337
#8  0x00007f9f757540a4 in start_thread (arg=0x7f9e7ffff700) at pthread_create.c:309
#9  0x00007f9f7616407d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7f9e7310f700 (LWP 3824)):
#0  __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1  0x00007f9f75758577 in pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:402
#2  0x00007f9f767d7918 in wait_relative (time=30000, this=0x47e78a0) at thread/qwaitcondition_unix.cpp:126
#3  wait (time=30000, this=0x47e78a0) at thread/qwaitcondition_unix.cpp:134
#4  QWaitCondition::wait (this=this@entry=0x42b2ca0, mutex=mutex@entry=0x431e2b0, time=30000) at thread/qwaitcondition_unix.cpp:208
#5  0x00007f9f767d39c4 in QThreadPoolThread::run (this=0x42b2c90) at thread/qthreadpool.cpp:127
#6  0x00007f9f767d687e in QThreadPrivate::start (arg=0x42b2c90) at thread/qthread_unix.cpp:337
#7  0x00007f9f757540a4 in start_thread (arg=0x7f9e7310f700) at pthread_create.c:309
#8  0x00007f9f7616407d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f9f7b55b940 (LWP 3528)):
[KCrash Handler]
#6  0x00007f9f76973468 in Change (c=..., this=0x4a23888) at ../../include/QtCore/5.4.2/QtCore/private/../../../../../src/corelib/itemmodels/qabstractitemmodel_p.h:128
#7  QVector<QAbstractItemModelPrivate::Change>::reallocData (this=this@entry=0x39ad4b0, asize=-1, aalloc=<optimized out>, options=...) at ../../include/QtCore/../../src/corelib/tools/qvector.h:517
#8  0x00007f9f7696e18a in resize (asize=<optimized out>, this=0x39ad4b0) at ../../include/QtCore/../../src/corelib/tools/qvector.h:383
#9  pop (this=0x39ad4b0) at ../../include/QtCore/../../src/corelib/tools/qstack.h:58
#10 QAbstractItemModel::endRemoveRows (this=0x39aa150) at itemmodels/qabstractitemmodel.cpp:2675
#11 0x00007f9e91ef674c in ?? () from /usr/lib/x86_64-linux-gnu/libtaskmanager.so.5
#12 0x00007f9f769f712e in QMetaObject::activate (sender=0x39aa170, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=0x7ffebe771060) at kernel/qobject.cpp:3717
#13 0x00007f9e91ee7ef2 in TaskManager::TaskGroup::itemRemoved(TaskManager::AbstractGroupableItem*) () from /usr/lib/x86_64-linux-gnu/libtaskmanager.so.5
#14 0x00007f9e91ee8a83 in TaskManager::TaskGroup::Private::signalRemovals() () from /usr/lib/x86_64-linux-gnu/libtaskmanager.so.5
#15 0x00007f9e91eea699 in ?? () from /usr/lib/x86_64-linux-gnu/libtaskmanager.so.5
#16 0x00007f9f769f7e8a in QObject::event (this=0x39aa170, e=<optimized out>) at kernel/qobject.cpp:1245
#17 0x00007f9f774c4adc in QApplicationPrivate::notify_helper (this=this@entry=0x22714d0, receiver=receiver@entry=0x39aa170, e=e@entry=0x394e030) at kernel/qapplication.cpp:3720
#18 0x00007f9f774c9fb0 in QApplication::notify (this=0x7ffebe7717b0, receiver=0x39aa170, e=0x394e030) at kernel/qapplication.cpp:3503
#19 0x00007f9f769c63ab in QCoreApplication::notifyInternal (this=0x7ffebe7717b0, receiver=0x39aa170, event=event@entry=0x394e030) at kernel/qcoreapplication.cpp:935
#20 0x00007f9f769c841b in sendEvent (event=0x394e030, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#21 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x2266ad0) at kernel/qcoreapplication.cpp:1552
#22 0x00007f9f769c8a18 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1410
#23 0x00007f9f76a1ef33 in postEventSourceDispatch (s=0x22bac80) at kernel/qeventdispatcher_glib.cpp:271
#24 0x00007f9f72ce7c3d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f9f72ce7f20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f9f72ce7fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007f9f76a1f347 in QEventDispatcherGlib::processEvents (this=0x22c08c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#28 0x00007f9f769c3b62 in QEventLoop::exec (this=this@entry=0x7ffebe771630, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#29 0x00007f9f769cb7ac in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1188
#30 0x0000000000430a43 in main ()

Possible duplicates by query: bug 344224.

Reported using DrKonqi
Comment 1 David Edmundson 2015-08-06 11:05:39 UTC 

*** This bug has been marked as a duplicate of bug 342763 ***