Bug 380801

Summary: KDE applications menu crash after typing a few characters.
Product: [Plasma] plasmashell Reporter: Park Sanghyung <scrtrees>
Component: generalAssignee: David Edmundson <kde>
Status: RESOLVED DUPLICATE    
Severity: crash CC: bshah, hmh, notmart, plasma-bugs-null
Priority: NOR Keywords: drkonqi
Version First Reported In: 5.9.4   
Target Milestone: 1.0   
Platform: Ubuntu   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Park Sanghyung 2017-06-04 07:26:22 UTC 
Application: plasmashell (5.9.4)

Qt Version: 5.7.1
Frameworks Version: 5.31.0
Operating System: Linux 4.10.0-21-generic x86_64
Distribution: Ubuntu 17.04

-- Information about the crash:
- What I was doing when the application crashed:
When I type a few characters (3~4 characters) to search in the applications menu.

- Unusual behavior I noticed:
Plasma stopped and restarted a few seconds after.

- Custom settings of the application:
This problem occured after using processor microcode firmware for Intel CPUs from intel-microcode.

The crash can be reproduced every time.

-- 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 0x7f4e32fdd280 (LWP 1332))]

Thread 20 (Thread 0x7f4d1effd700 (LWP 1574)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4e2d2a0b4b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f4d5b52c240 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x00007f4d5b530478 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f4d5b52b3bd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f4d5b52e289 in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f4e2d29fc98 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f4e2c1426da in start_thread (arg=0x7f4d1effd700) at pthread_create.c:456
#8  0x00007f4e2cbac17f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 19 (Thread 0x7f4d1f7fe700 (LWP 1573)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4e2d2a0b4b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f4d5b52c240 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x00007f4d5b530478 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f4d5b52b3bd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f4d5b52e289 in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f4e2d29fc98 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f4e2c1426da in start_thread (arg=0x7f4d1f7fe700) at pthread_create.c:456
#8  0x00007f4e2cbac17f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 18 (Thread 0x7f4d1ffff700 (LWP 1572)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4e2d2a0b4b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f4d5b52c240 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x00007f4d5b530478 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f4d5b52b3bd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f4d5b5304d2 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f4d5b52b3bd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f4d5b52e289 in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f4e2d29fc98 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f4e2c1426da in start_thread (arg=0x7f4d1ffff700) at pthread_create.c:456
#10 0x00007f4e2cbac17f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 17 (Thread 0x7f4d34811700 (LWP 1571)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4e2d2a0b4b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f4d5b52c240 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x00007f4d5b530478 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f4d5b52b3bd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f4d5b52e289 in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f4e2d29fc98 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f4e2c1426da in start_thread (arg=0x7f4d34811700) at pthread_create.c:456
#8  0x00007f4e2cbac17f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 16 (Thread 0x7f4d35012700 (LWP 1570)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4e2d2a0b4b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f4d5b52c240 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x00007f4d5b530478 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f4d5b52b3bd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f4d5b52e289 in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f4e2d29fc98 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f4e2c1426da in start_thread (arg=0x7f4d35012700) at pthread_create.c:456
#8  0x00007f4e2cbac17f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 15 (Thread 0x7f4d35813700 (LWP 1569)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4e2d2a0b4b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f4d5b52c240 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x00007f4d5b530478 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f4d5b52b3bd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f4d5b5304d2 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f4d5b52b3bd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f4d5b52e289 in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f4e2d29fc98 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f4e2c1426da in start_thread (arg=0x7f4d35813700) at pthread_create.c:456
#10 0x00007f4e2cbac17f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 14 (Thread 0x7f4d36014700 (LWP 1568)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4e2d2a0b4b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f4d5b52c240 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x00007f4d5b530478 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f4d5b52b3bd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f4d5b52e289 in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f4e2d29fc98 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f4e2c1426da in start_thread (arg=0x7f4d36014700) at pthread_create.c:456
#8  0x00007f4e2cbac17f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 13 (Thread 0x7f4d36815700 (LWP 1567)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4e2d2a0b4b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f4d5b52c240 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#3  0x00007f4d5b530478 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#4  0x00007f4d5b52b3bd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#5  0x00007f4d5b5304d2 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#6  0x00007f4d5b52b3bd in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007f4d5b52e289 in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007f4e2d29fc98 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f4e2c1426da in start_thread (arg=0x7f4d36815700) at pthread_create.c:456
#10 0x00007f4e2cbac17f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 12 (Thread 0x7f4d4be90700 (LWP 1557)):
#0  0x00007f4e27836ef4 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f4e277f0d99 in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4e277f14e8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4e277f168c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4e2d4c3f2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f4e2d46d88a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f4e2d29afe3 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f4d4e3ad5c7 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#8  0x00007f4e2d29fc98 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f4e2c1426da in start_thread (arg=0x7f4d4be90700) at pthread_create.c:456
#10 0x00007f4e2cbac17f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 11 (Thread 0x7f4d72a29700 (LWP 1542)):
#0  0x00007f4e32ed2bbb in _dl_update_slotinfo (req_modid=1) at dl-tls.c:645
#1  0x00007f4e32ed2dcc in update_get_addr (ti=0x7f4e2d8b8660) at dl-tls.c:802
#2  0x00007f4e2d29eb26 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f4e2d4c367a in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f4e277f0a6d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f4e277f149b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f4e277f168c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f4e2d4c3f2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f4e2d46d88a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f4e2d29afe3 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f4e30ce94c6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007f4e2d29fc98 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f4e2c1426da in start_thread (arg=0x7f4d72a29700) at pthread_create.c:456
#13 0x00007f4e2cbac17f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 10 (Thread 0x7f4d7d426700 (LWP 1482)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4d8363d52b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#2  0x00007f4d8363d257 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#3  0x00007f4e2c1426da in start_thread (arg=0x7f4d7d426700) at pthread_create.c:456
#4  0x00007f4e2cbac17f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 9 (Thread 0x7f4d7dc27700 (LWP 1481)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4d8363d52b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#2  0x00007f4d8363d257 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#3  0x00007f4e2c1426da in start_thread (arg=0x7f4d7dc27700) at pthread_create.c:456
#4  0x00007f4e2cbac17f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 8 (Thread 0x7f4d7e428700 (LWP 1480)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4d8363d52b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#2  0x00007f4d8363d257 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#3  0x00007f4e2c1426da in start_thread (arg=0x7f4d7e428700) at pthread_create.c:456
#4  0x00007f4e2cbac17f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 7 (Thread 0x7f4d7ec29700 (LWP 1479)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4d8363d52b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#2  0x00007f4d8363d257 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#3  0x00007f4e2c1426da in start_thread (arg=0x7f4d7ec29700) at pthread_create.c:456
#4  0x00007f4e2cbac17f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 6 (Thread 0x7f4d7f664700 (LWP 1478)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4d8363d52b in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#2  0x00007f4d8363d257 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#3  0x00007f4e2c1426da in start_thread (arg=0x7f4d7f664700) at pthread_create.c:456
#4  0x00007f4e2cbac17f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 5 (Thread 0x7f4e0cdca700 (LWP 1470)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4e329532c4 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f4e32953309 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f4e2c1426da in start_thread (arg=0x7f4e0cdca700) at pthread_create.c:456
#4  0x00007f4e2cbac17f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 4 (Thread 0x7f4e0ed99700 (LWP 1460)):
#0  0x00007f4e2cba018d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4e277f1576 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4e277f168c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4e2d4c3f2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f4e2d46d88a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f4e2d29afe3 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f4e30162df5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f4e2d29fc98 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f4e2c1426da in start_thread (arg=0x7f4e0ed99700) at pthread_create.c:456
#9  0x00007f4e2cbac17f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 3 (Thread 0x7f4e14d58700 (LWP 1415)):
#0  0x00007f4e2cba018d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4e277f1576 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4e277f168c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4e2d4c3f2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f4e2d46d88a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f4e2d29afe3 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f4e30162df5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f4e2d29fc98 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f4e2c1426da in start_thread (arg=0x7f4e14d58700) at pthread_create.c:456
#9  0x00007f4e2cbac17f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 2 (Thread 0x7f4e1f13a700 (LWP 1337)):
#0  0x00007f4e2cba018d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4e277f1576 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4e277f168c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4e2d4c3f2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f4e2d46d88a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f4e2d29afe3 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f4e2d8d65c5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f4e2d29fc98 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f4e2c1426da in start_thread (arg=0x7f4e1f13a700) at pthread_create.c:456
#9  0x00007f4e2cbac17f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105

Thread 1 (Thread 0x7f4e32fdd280 (LWP 1332)):
[KCrash Handler]
#6  0x00007f4e2d49bde5 in QMetaObject::activate(QObject*, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f4e2ff354ef in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f4e3018657a in QQmlDelegateModel::_q_itemsChanged(int, int, QVector<int> const&) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f4e301add2c in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007f4e301ae468 in QQmlDelegateModel::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#11 0x00007f4e2d49b644 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f4e2d5124bc in QAbstractItemModel::dataChanged(QModelIndex const&, QModelIndex const&, QVector<int> const&) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007f4d70dfd800 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/private/kicker/libkickerplugin.so
#14 0x00007f4d70dfb63e in ?? () from /usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/private/kicker/libkickerplugin.so
#15 0x00007f4d70e0bac9 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/private/kicker/libkickerplugin.so
#16 0x00007f4e2d49b4a9 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007f4d70082892 in Plasma::RunnerManager::matchesChanged(QList<Plasma::QueryMatch> const&) () from /usr/lib/x86_64-linux-gnu/libKF5Runner.so.5
#18 0x00007f4d70086ea1 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5Runner.so.5
#19 0x00007f4e2d49b4a9 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007f4e2d4a7e38 in QTimer::timerEvent(QTimerEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007f4e2d49c313 in QObject::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007f4e2e3d235c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#23 0x00007f4e2e3d9b11 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#24 0x00007f4e2d46f8a0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007f4e2d4c2eae in QTimerInfoList::activateTimers() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007f4e2d4c33d1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00007f4e277f1377 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007f4e277f15e0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007f4e277f168c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#30 0x00007f4e2d4c3f0f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x00007f4e2d46d88a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#32 0x00007f4e2d475ffc in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#33 0x0000561c9554e0bf in ?? ()
#34 0x00007f4e2cac43f1 in __libc_start_main (main=0x561c9554d560, argc=1, argv=0x7ffe801760d8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe801760c8) at ../csu/libc-start.c:291
#35 0x0000561c9554e43a in _start ()

Possible duplicates by query: bug 380300, bug 380026, bug 379768, bug 379570, bug 379560.

Reported using DrKonqi
Comment 1 Henrique de Moraes Holschuh 2017-06-04 18:52:01 UTC 
Responding to this report because I take care of the intel-microcode packages for Debian, and that's what ends up in Ubuntu most of the time.

This is the first time we heard about something like this after a microcode update.  Please open a bug about it in Ubuntu's launchpad, against the intel-microcode package, and we will take it from there.  We will need a lot more information about your system to be able to help.

Note: if you overclock, overvolt, underclock or undevolt your system, reset *everything* to the recommended values by Intel and check if the issue remains.
Comment 2 Marco Martin 2017-06-09 11:31:00 UTC 

*** This bug has been marked as a duplicate of bug 369430 ***
Comment 3 Christoph Feck 2017-06-14 15:32:47 UTC 
Henrique, I can assure you that this (randomly occuring) crash is not related to Intel microcode. It also happens on AMD systems.
Comment 4 Henrique de Moraes Holschuh 2017-06-14 16:34:39 UTC 
(In reply to Christoph Feck from comment #3)
> Henrique, I can assure you that this (randomly occuring) crash is not
> related to Intel microcode. It also happens on AMD systems.

Christoph, thank you very much for the information!