Bug 411597

Summary: KDE Updater Crash from Notification Center
Product: [Applications] Discover Reporter: Alex Anderson <admin>
Component: discoverAssignee: Dan Leinir Turthra Jensen <leinir>
Status: RESOLVED UPSTREAM    
Severity: crash CC: aleixpol, tewc79
Priority: NOR Keywords: drkonqi
Version: 5.14.5   
Target Milestone: ---   
Platform: Debian testing   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:
Attachments: New crash information added by DrKonqi

Description Alex Anderson 2019-09-04 18:35:02 UTC 
Application: plasma-discover (5.14.5)

Qt Version: 5.11.3
Frameworks Version: 5.54.0
Operating System: Linux 5.2.0-2parrot1-amd64 x86_64
Distribution: Parrot GNU/Linux 4.7

-- Information about the crash:
- What I was doing when the application crashed:
Using the Notification Center update widget to "view updates" available for my system

- Custom settings of the application:
Using Parrot OS (https://parrotlinux.org/) 5.2.0-2parrot1-amd64 (stable, based on Debian testing)

The crash can be reproduced every time.

-- Backtrace:
Application: Discover (plasma-discover), signal: Aborted
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f855c330800 (LWP 2755))]

Thread 18 (Thread 0x7f84e7fff700 (LWP 2775)):
#0  0x00007f855ff50819 in __GI___poll (fds=0x55da4ef9b2b0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f855eb86bf6 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f855eb86f82 in g_main_loop_run () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8521a52e46 in  () at /lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f855ebaf89d in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f855f404fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f855ff5b4cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7f8520e81700 (LWP 2774)):
#0  0x00007f855ff4c494 in __GI___libc_read (nbytes=16, buf=0x7f8520e80ce0, fd=26) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007f855ff4c494 in __GI___libc_read (fd=26, buf=0x7f8520e80ce0, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:24
#2  0x00007f855ebcd430 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f855eb866cf in g_main_context_check () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f855eb86ba0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f855eb86d1c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f855eb86d61 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f855ebaf89d in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007f855f404fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#9  0x00007f855ff5b4cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7f852230e700 (LWP 2773)):
#0  0x00007f855f40b3f9 in futex_reltimed_wait_cancelable (private=0, reltime=0x7f852230dc50, expected=0, futex_word=0x7f8510008004) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f855f40b3f9 in __pthread_cond_wait_common (abstime=0x7f852230dd10, mutex=0x7f8510007fb0, cond=0x7f8510007fd8) at pthread_cond_wait.c:533
#2  0x00007f855f40b3f9 in __pthread_cond_timedwait (cond=0x7f8510007fd8, mutex=0x7f8510007fb0, abstime=0x7f852230dd10) at pthread_cond_wait.c:667
#3  0x00007f85602c009c in QWaitCondition::wait(QMutex*, unsigned long) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f85602b8152 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f85602bfa07 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f855f404fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#7  0x00007f855ff5b4cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7f8522d13700 (LWP 2772)):
#0  0x00007f855f40b3f9 in futex_reltimed_wait_cancelable (private=0, reltime=0x7f8522d12c50, expected=0, futex_word=0x7f85100061e0) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f855f40b3f9 in __pthread_cond_wait_common (abstime=0x7f8522d12d10, mutex=0x7f8510006190, cond=0x7f85100061b8) at pthread_cond_wait.c:533
#2  0x00007f855f40b3f9 in __pthread_cond_timedwait (cond=0x7f85100061b8, mutex=0x7f8510006190, abstime=0x7f8522d12d10) at pthread_cond_wait.c:667
#3  0x00007f85602c009c in QWaitCondition::wait(QMutex*, unsigned long) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f85602b8152 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f85602bfa07 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f855f404fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#7  0x00007f855ff5b4cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7f8523514700 (LWP 2771)):
#0  0x00007f855ff55f59 in syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007f85602b4a84 in QSemaphore::acquire(int) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f8560490708 in QMetaObject::activate(QObject*, int, int, void**) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f855f9d1d82 in  () at /lib/x86_64-linux-gnu/libQt5Network.so.5
#4  0x00007f855f9d2b6c in  () at /lib/x86_64-linux-gnu/libQt5Network.so.5
#5  0x00007f8560490463 in QMetaObject::activate(QObject*, int, int, void**) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f855f9d0dd2 in  () at /lib/x86_64-linux-gnu/libQt5Network.so.5
#7  0x00007f855f9244b5 in  () at /lib/x86_64-linux-gnu/libQt5Network.so.5
#8  0x00007f855f925c2c in  () at /lib/x86_64-linux-gnu/libQt5Network.so.5
#9  0x00007f8560490463 in QMetaObject::activate(QObject*, int, int, void**) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f855f9a0972 in QSslSocket::preSharedKeyAuthenticationRequired(QSslPreSharedKeyAuthenticator*) () at /lib/x86_64-linux-gnu/libQt5Network.so.5
#11 0x00007f855f9c6e8a in  () at /lib/x86_64-linux-gnu/libQt5Network.so.5
#12 0x00007f853c1dc2ae in  () at /lib/x86_64-linux-gnu/libssl.so.1.1
#13 0x00007f853c1da2b9 in  () at /lib/x86_64-linux-gnu/libssl.so.1.1
#14 0x00007f853c1e4406 in  () at /lib/x86_64-linux-gnu/libssl.so.1.1
#15 0x00007f853c1e333f in  () at /lib/x86_64-linux-gnu/libssl.so.1.1
#16 0x00007f853c1cf264 in SSL_do_handshake () at /lib/x86_64-linux-gnu/libssl.so.1.1
#17 0x00007f855f9c7605 in  () at /lib/x86_64-linux-gnu/libQt5Network.so.5
#18 0x00007f855f9c79a5 in  () at /lib/x86_64-linux-gnu/libQt5Network.so.5
#19 0x00007f855f9a1618 in QSslSocket::startClientEncryption() () at /lib/x86_64-linux-gnu/libQt5Network.so.5
#20 0x00007f855f9a2330 in  () at /lib/x86_64-linux-gnu/libQt5Network.so.5
#21 0x00007f855f9a9d79 in  () at /lib/x86_64-linux-gnu/libQt5Network.so.5
#22 0x00007f8560490463 in QMetaObject::activate(QObject*, int, int, void**) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007f855f9701f3 in  () at /lib/x86_64-linux-gnu/libQt5Network.so.5
#24 0x00007f855f972fb0 in  () at /lib/x86_64-linux-gnu/libQt5Network.so.5
#25 0x00007f855f981f5d in  () at /lib/x86_64-linux-gnu/libQt5Network.so.5
#26 0x00007f856127a501 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#27 0x00007f85612819b0 in QApplication::notify(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#28 0x00007f8560467029 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007f85604b8fea in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00007f855eb869ee in g_main_context_dispatch () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#31 0x00007f855eb86c88 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#32 0x00007f855eb86d1c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#33 0x00007f85604b83e3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#34 0x00007f8560465cfb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#35 0x00007f85602b5d8e in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#36 0x00007f85602bfa07 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#37 0x00007f855f404fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#38 0x00007f855ff5b4cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7f8523fff700 (LWP 2770)):
#0  0x00007f855ff50819 in __GI___poll (fds=0x7f8518004e30, nfds=1, timeout=9724) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f855eb86bf6 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f855eb86d1c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f85604b83e3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8560465cfb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f85602b5d8e in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f85602bfa07 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f855f404fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007f855ff5b4cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7f853d7fa700 (LWP 2769)):
#0  0x00007f855ff4c494 in __GI___libc_read (nbytes=16, buf=0x7f853d7f9b40, fd=15) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007f855ff4c494 in __GI___libc_read (fd=15, buf=0x7f853d7f9b40, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:24
#2  0x00007f855ebcd430 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f855eb866cf in g_main_context_check () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f855eb86ba0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f855eb86d1c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f85604b83e3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f8560465cfb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f85602b5d8e in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f8561ce9476 in  () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#10 0x00007f85602bfa07 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f855f404fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#12 0x00007f855ff5b4cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f853dffb700 (LWP 2765)):
#0  0x00007f855f40b00c in futex_wait_cancelable (private=0, expected=0, futex_word=0x55da4e812be0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f855f40b00c in __pthread_cond_wait_common (abstime=0x0, mutex=0x55da4e812b90, cond=0x55da4e812bb8) at pthread_cond_wait.c:502
#2  0x00007f855f40b00c in __pthread_cond_wait (cond=0x55da4e812bb8, mutex=0x55da4e812b90) at pthread_cond_wait.c:655
#3  0x00007f8551d29c4b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f8551d29877 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f855f404fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f855ff5b4cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f853e7fc700 (LWP 2764)):
#0  0x00007f855f40b00c in futex_wait_cancelable (private=0, expected=0, futex_word=0x55da4e812be0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f855f40b00c in __pthread_cond_wait_common (abstime=0x0, mutex=0x55da4e812b90, cond=0x55da4e812bb8) at pthread_cond_wait.c:502
#2  0x00007f855f40b00c in __pthread_cond_wait (cond=0x55da4e812bb8, mutex=0x55da4e812b90) at pthread_cond_wait.c:655
#3  0x00007f8551d29c4b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f8551d29877 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f855f404fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f855ff5b4cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f853effd700 (LWP 2763)):
#0  0x00007f855f40b00c in futex_wait_cancelable (private=0, expected=0, futex_word=0x55da4e812660) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f855f40b00c in __pthread_cond_wait_common (abstime=0x0, mutex=0x55da4e812610, cond=0x55da4e812638) at pthread_cond_wait.c:502
#2  0x00007f855f40b00c in __pthread_cond_wait (cond=0x55da4e812638, mutex=0x55da4e812610) at pthread_cond_wait.c:655
#3  0x00007f8551d29c4b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f8551d29877 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f855f404fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f855ff5b4cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f853f7fe700 (LWP 2762)):
#0  0x00007f855f40b00c in futex_wait_cancelable (private=0, expected=0, futex_word=0x55da4e812660) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f855f40b00c in __pthread_cond_wait_common (abstime=0x0, mutex=0x55da4e812610, cond=0x55da4e812638) at pthread_cond_wait.c:502
#2  0x00007f855f40b00c in __pthread_cond_wait (cond=0x55da4e812638, mutex=0x55da4e812610) at pthread_cond_wait.c:655
#3  0x00007f8551d29c4b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f8551d29877 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f855f404fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f855ff5b4cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f853ffff700 (LWP 2761)):
#0  0x00007f855f40b00c in futex_wait_cancelable (private=0, expected=0, futex_word=0x55da4e812660) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f855f40b00c in __pthread_cond_wait_common (abstime=0x0, mutex=0x55da4e812610, cond=0x55da4e812638) at pthread_cond_wait.c:502
#2  0x00007f855f40b00c in __pthread_cond_wait (cond=0x55da4e812638, mutex=0x55da4e812610) at pthread_cond_wait.c:655
#3  0x00007f8551d29c4b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f8551d29877 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f855f404fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f855ff5b4cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f8550b43700 (LWP 2760)):
#0  0x00007f855f40b00c in futex_wait_cancelable (private=0, expected=0, futex_word=0x55da4e309b18) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f855f40b00c in __pthread_cond_wait_common (abstime=0x0, mutex=0x55da4e309ac8, cond=0x55da4e309af0) at pthread_cond_wait.c:502
#2  0x00007f855f40b00c in __pthread_cond_wait (cond=0x55da4e309af0, mutex=0x55da4e309ac8) at pthread_cond_wait.c:655
#3  0x00007f8551d29c4b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f8551d29877 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f855f404fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f855ff5b4cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f85514b2700 (LWP 2759)):
#0  0x00007f855f40b00c in futex_wait_cancelable (private=0, expected=0, futex_word=0x55da4e32cc18) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f855f40b00c in __pthread_cond_wait_common (abstime=0x0, mutex=0x55da4e32cbc8, cond=0x55da4e32cbf0) at pthread_cond_wait.c:502
#2  0x00007f855f40b00c in __pthread_cond_wait (cond=0x55da4e32cbf0, mutex=0x55da4e32cbc8) at pthread_cond_wait.c:655
#3  0x00007f8551d29c4b in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f8551d29877 in  () at /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f855f404fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f855ff5b4cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f8553fff700 (LWP 2758)):
#0  0x00007f855ff4c494 in __GI___libc_read (nbytes=16, buf=0x7f8553ffeb60, fd=9) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007f855ff4c494 in __GI___libc_read (fd=9, buf=0x7f8553ffeb60, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:24
#2  0x00007f855ebcd430 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f855eb866cf in g_main_context_check () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f855eb86ba0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f855eb86d1c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f85604b83e3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f8560465cfb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f85602b5d8e in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f8560a42c65 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007f85602bfa07 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f855f404fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#12 0x00007f855ff5b4cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f8559906700 (LWP 2757)):
#0  0x00007f855ff4c494 in __GI___libc_read (nbytes=16, buf=0x7f8559905b50, fd=7) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007f855ff4c494 in __GI___libc_read (fd=7, buf=0x7f8559905b50, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:24
#2  0x00007f855ebcd430 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f855eb866cf in g_main_context_check () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f855eb86ba0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f855eb86d1c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f85604b83e3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f8560465cfb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f85602b5d8e in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f856178a545 in  () at /lib/x86_64-linux-gnu/libQt5DBus.so.5
#10 0x00007f85602bfa07 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f855f404fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#12 0x00007f855ff5b4cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f855b12d700 (LWP 2756)):
#0  0x00007f855ff50819 in __GI___poll (fds=0x7f855b12ccb8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f855eaa5cf7 in  () at /lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f855eaa791a in xcb_wait_for_event () at /lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f855bed0d79 in  () at /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f85602bfa07 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f855f404fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f855ff5b4cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f855c330800 (LWP 2755)):
[KCrash Handler]
#6  0x00007f855fe997bb in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#7  0x00007f855fe84535 in __GI_abort () at abort.c:79
#8  0x00007f855fedb508 in __libc_message (action=action@entry=do_abort, fmt=fmt@entry=0x7f855ffe628d "%s\n") at ../sysdeps/posix/libc_fatal.c:181
#9  0x00007f855fee1c1a in malloc_printerr (str=str@entry=0x7f855ffe7f58 "free(): double free detected in tcache 2") at malloc.c:5341
#10 0x00007f855fee36fd in _int_free (av=0x7f856001dc40 <main_arena>, p=0x55da4fcc6c50, have_lock=<optimized out>) at malloc.c:4193
#11 0x00007f853c0750d3 in  () at /lib/x86_64-linux-gnu/libappstream.so.4
#12 0x00007f853c0753dd in  () at /lib/x86_64-linux-gnu/libappstream.so.4
#13 0x00007f853c083c31 in  () at /lib/x86_64-linux-gnu/libappstream.so.4
#14 0x00007f853c07ea3f in as_metadata_parse () at /lib/x86_64-linux-gnu/libappstream.so.4
#15 0x00007f853c07eecc in as_metadata_parse_file () at /lib/x86_64-linux-gnu/libappstream.so.4
#16 0x00007f853c08b1ba in as_pool_load () at /lib/x86_64-linux-gnu/libappstream.so.4
#17 0x00007f853c0d57f7 in AppStream::Pool::load() () at /lib/x86_64-linux-gnu/libAppStreamQt.so.2
#18 0x00007f853c0d58cf in AppStream::Pool::load(QString*) () at /lib/x86_64-linux-gnu/libAppStreamQt.so.2
#19 0x00007f853c243815 in PackageKitBackend::reloadPackageList() () at /usr/lib/x86_64-linux-gnu/qt5/plugins/discover/packagekit-backend.so
#20 0x00007f853c2442ed in PackageKitBackend::PackageKitBackend(QObject*) () at /usr/lib/x86_64-linux-gnu/qt5/plugins/discover/packagekit-backend.so
#21 0x00007f853c24a91b in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/discover/packagekit-backend.so
#22 0x00007f8561b81fe4 in DiscoverBackendsFactory::backendForFile(QString const&, QString const&) const () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#23 0x00007f8561b8273b in DiscoverBackendsFactory::backend(QString const&) const () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#24 0x00007f8561b82b77 in DiscoverBackendsFactory::allBackends() const () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#25 0x00007f8561b6d62a in ResourcesModel::registerAllBackends() () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#26 0x00007f8561b926d5 in  () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#27 0x00007f8560490d62 in QObject::event(QEvent*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x00007f856127a501 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#29 0x00007f85612819b0 in QApplication::notify(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#30 0x00007f8560467029 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x00007f856046a00b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#32 0x00007f85604b8da3 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#33 0x00007f855eb869ee in g_main_context_dispatch () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#34 0x00007f855eb86c88 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007f855eb86d1c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#36 0x00007f85604b83c7 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#37 0x00007f855bf67391 in  () at /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#38 0x00007f8560465cfb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#39 0x00007f856046dcd2 in QCoreApplication::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#40 0x000055da4cc42b23 in  ()
#41 0x00007f855fe8609b in __libc_start_main (main=0x55da4cc42550, argc=1, argv=0x7fffab235388, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffab235378) at ../csu/libc-start.c:308
#42 0x000055da4cc430ca in _start ()
[Inferior 1 (process 2755) detached]

Possible duplicates by query: bug 398708, bug 398639, bug 398607, bug 398597, bug 398564.

Reported using DrKonqi
Comment 1 Aleix Pol 2019-10-28 18:21:30 UTC 
This is a crash in libappstream, told the maintainer.
Comment 2 chris 2019-12-14 09:14:41 UTC 
Created attachment 124482 [details]
New crash information added by DrKonqi

plasma-discover (5.14.5) using Qt 5.12.5

- Unusual behavior I noticed: Letters  in windows became hard to read and faint along with everything shutting down momentarily and coming back on.

-- Backtrace (Reduced):
#6  0x00007fb69dc8e081 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#7  0x00007fb69dc79535 in __GI_abort () at abort.c:79
[...]
#9  0x00007fb69dcd648a in malloc_printerr (str=str@entry=0x7fb69dddc768 "free(): double free detected in tcache 2") at malloc.c:5361
#10 0x00007fb69dcd7e4d in _int_free (av=0x7fb69de0dc40 <main_arena>, p=0x5639e86e32f0, have_lock=<optimized out>) at malloc.c:4215
#11 0x00007fb6898d6674 in  () at /lib/x86_64-linux-gnu/libappstream.so.4