Bug 404003

Summary: Crash installing any Flatpak package from Gnome Builder
Product: [Applications] Discover Reporter: slavslav <oooslavooo>
Component: discoverAssignee: Dan Leinir Turthra Jensen <leinir>
Status: RESOLVED DUPLICATE    
Severity: crash CC: aleixpol, nate
Priority: NOR Keywords: drkonqi
Version First Reported In: 5.14.90   
Target Milestone: ---   
Platform: Ubuntu   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description slavslav 2019-02-06 14:35:47 UTC 
Application: plasma-discover (5.14.90)

Qt Version: 5.11.3
Frameworks Version: 5.54.0
Operating System: Linux 4.19.0-12-generic x86_64
Distribution: Ubuntu Disco Dingo (development branch)

-- Information about the crash:
- Build any Gnome Builder Flatpak package
- Install with discovery
- Discovery crashed

The crash can be reproduced every time.

-- Backtrace:
Application: Discover (plasma-discover), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fba46654800 (LWP 3746))]

Thread 20 (Thread 0x7fba1effd700 (LWP 6305)):
#0  0x00007fba4a4d3219 in syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007fba48edd0ba in g_cond_wait_until () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fba48e65091 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fba48ebbf02 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fba48ebb425 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fba49703164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007fba4a4d9def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7fba250fc700 (LWP 6303)):
#0  0x00007fba4a4cd6d9 in __GI___poll (fds=0x7fb9ec003b80, nfds=1, timeout=300000) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fba48e93136 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fba48e9325c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fba268fa1b6 in  () at /lib/x86_64-linux-gnu/libostree-1.so.1
#4  0x00007fba48ebb425 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fba49703164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007fba4a4d9def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7fba25e5b700 (LWP 6302)):
#0  0x00007fba4a4cd6d9 in __GI___poll (fds=0x7fba0c00c960, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fba48e93136 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fba48e9325c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fba268fa1b6 in  () at /lib/x86_64-linux-gnu/libostree-1.so.1
#4  0x00007fba48ebb425 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fba49703164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007fba4a4d9def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7fb9c27fc700 (LWP 6301)):
#0  0x00007fba4a4cd6d9 in __GI___poll (fds=0x7fb9b00186f0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fba48e93136 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fba48e9325c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fba268fa1b6 in  () at /lib/x86_64-linux-gnu/libostree-1.so.1
#4  0x00007fba48ebb425 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fba49703164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007fba4a4d9def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7fb9c3fff700 (LWP 6300)):
#0  0x00007fba4a4cd6d9 in __GI___poll (fds=0x7fba15032fb0, nfds=2, timeout=60000) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fba48e93136 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fba48e9325c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fba268fa1b6 in  () at /lib/x86_64-linux-gnu/libostree-1.so.1
#4  0x00007fba48ebb425 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fba49703164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007fba4a4d9def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7fba1e7fc700 (LWP 3830)):
#0  0x00007fba4a4cd6d9 in __GI___poll (fds=0x7fb9e8000b20, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fba48e93136 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fba48e9325c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fba4a9f016b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fba4a99d14b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fba4a7ec106 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fba4a7f5cd7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fba49703164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007fba4a4d9def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7fba1f7fe700 (LWP 3827)):
#0  0x00007fba4a4d3219 in syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007fba48edd0ba in g_cond_wait_until () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fba48e65091 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fba48ebbf02 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fba48ebb425 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fba49703164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007fba4a4d9def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7fb9c2ffd700 (LWP 3821)):
#0  0x00007fba4a4c8f64 in __GI___libc_read (fd=72, buf=0x7fb9c2ffcce0, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007fba48ed8aa0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fba48e92c0f in g_main_context_check () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fba48e930e0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fba48e9325c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fba48e932a1 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fba48ebb425 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007fba49703164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007fba4a4d9def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7fb9d97fa700 (LWP 3819)):
#0  0x00007fba4a4cd6d9 in __GI___poll (fds=0x7fb9c4005a80, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fba48e93136 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fba48e9325c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fba4a9f016b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fba4a99d14b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fba4a7ec106 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fba4a7f5cd7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fba49703164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007fba4a4d9def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7fb9ba3cc700 (LWP 3816)):
#0  0x00007fba4a4cd6d9 in __GI___poll (fds=0x7fba0c00dda0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fba48e93136 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fba48e9325c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fba268f89cd in  () at /lib/x86_64-linux-gnu/libostree-1.so.1
#4  0x00007fba268bf33e in  () at /lib/x86_64-linux-gnu/libostree-1.so.1
#5  0x00007fba268c8b79 in ostree_repo_remote_fetch_summary_with_options () at /lib/x86_64-linux-gnu/libostree-1.so.1
#6  0x00007fba268a95f6 in ostree_repo_remote_fetch_summary () at /lib/x86_64-linux-gnu/libostree-1.so.1
#7  0x00007fba26aad4d2 in  () at /lib/x86_64-linux-gnu/libflatpak.so.0
#8  0x00007fba26aad948 in  () at /lib/x86_64-linux-gnu/libflatpak.so.0
#9  0x00007fba26ae6618 in flatpak_installation_fetch_remote_metadata_sync () at /lib/x86_64-linux-gnu/libflatpak.so.0
#10 0x00007fba26ba5e50 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/discover/flatpak-backend.so
#11 0x00007fba26ba26f8 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/discover/flatpak-backend.so
#12 0x00007fba4a7edfc1 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007fba4a7f5cd7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007fba49703164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#15 0x00007fba4a4d9def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7fb9babcd700 (LWP 3815)):
#0  0x00007fba4a4cd6d9 in __GI___poll (fds=0x7fb9cc00ab70, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fba48e93136 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fba48e9325c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fba268f89cd in  () at /lib/x86_64-linux-gnu/libostree-1.so.1
#4  0x00007fba268bf33e in  () at /lib/x86_64-linux-gnu/libostree-1.so.1
#5  0x00007fba268c8b79 in ostree_repo_remote_fetch_summary_with_options () at /lib/x86_64-linux-gnu/libostree-1.so.1
#6  0x00007fba268a95f6 in ostree_repo_remote_fetch_summary () at /lib/x86_64-linux-gnu/libostree-1.so.1
#7  0x00007fba26aad4d2 in  () at /lib/x86_64-linux-gnu/libflatpak.so.0
#8  0x00007fba26aad948 in  () at /lib/x86_64-linux-gnu/libflatpak.so.0
#9  0x00007fba26ae6618 in flatpak_installation_fetch_remote_metadata_sync () at /lib/x86_64-linux-gnu/libflatpak.so.0
#10 0x00007fba26ba5e50 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/discover/flatpak-backend.so
#11 0x00007fba26ba26f8 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/discover/flatpak-backend.so
#12 0x00007fba4a7edfc1 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007fba4a7f5cd7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007fba49703164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#15 0x00007fba4a4d9def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7fb9bb3ce700 (LWP 3814)):
#0  0x00007fba4a4cd6d9 in __GI___poll (fds=0x7fb9d1044780, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fba48e93136 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fba48e9325c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fba268f89cd in  () at /lib/x86_64-linux-gnu/libostree-1.so.1
#4  0x00007fba268bf33e in  () at /lib/x86_64-linux-gnu/libostree-1.so.1
#5  0x00007fba268c8b79 in ostree_repo_remote_fetch_summary_with_options () at /lib/x86_64-linux-gnu/libostree-1.so.1
#6  0x00007fba268a95f6 in ostree_repo_remote_fetch_summary () at /lib/x86_64-linux-gnu/libostree-1.so.1
#7  0x00007fba26aad4d2 in  () at /lib/x86_64-linux-gnu/libflatpak.so.0
#8  0x00007fba26aad948 in  () at /lib/x86_64-linux-gnu/libflatpak.so.0
#9  0x00007fba26ae6618 in flatpak_installation_fetch_remote_metadata_sync () at /lib/x86_64-linux-gnu/libflatpak.so.0
#10 0x00007fba26ba5e50 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/discover/flatpak-backend.so
#11 0x00007fba26ba26f8 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/discover/flatpak-backend.so
#12 0x00007fba4a7edfc1 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007fba4a7f5cd7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007fba49703164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#15 0x00007fba4a4d9def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7fba26836700 (LWP 3781)):
#0  0x00007fba4a4cd6d9 in __GI___poll (fds=0x7fba14012980, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fba48e93136 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fba48e9325c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fba268f89cd in  () at /lib/x86_64-linux-gnu/libostree-1.so.1
#4  0x00007fba268bf33e in  () at /lib/x86_64-linux-gnu/libostree-1.so.1
#5  0x00007fba268c8b79 in ostree_repo_remote_fetch_summary_with_options () at /lib/x86_64-linux-gnu/libostree-1.so.1
#6  0x00007fba268a95f6 in ostree_repo_remote_fetch_summary () at /lib/x86_64-linux-gnu/libostree-1.so.1
#7  0x00007fba26aad4d2 in  () at /lib/x86_64-linux-gnu/libflatpak.so.0
#8  0x00007fba26aad948 in  () at /lib/x86_64-linux-gnu/libflatpak.so.0
#9  0x00007fba26ae6618 in flatpak_installation_fetch_remote_metadata_sync () at /lib/x86_64-linux-gnu/libflatpak.so.0
#10 0x00007fba26ba5e50 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/discover/flatpak-backend.so
#11 0x00007fba26ba26f8 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/discover/flatpak-backend.so
#12 0x00007fba4a7edfc1 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007fba4a7f5cd7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007fba49703164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#15 0x00007fba4a4d9def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7fba366f3700 (LWP 3756)):
#0  0x00007fba4a4cd6d9 in __GI___poll (fds=0x7fba28042440, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fba48e93136 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fba48e9325c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fba4a9f016b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fba4a99d14b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fba4a7ec106 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fba4a7f5cd7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fba49703164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007fba4a4d9def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fba35ef2700 (LWP 3755)):
#0  0x00007fba4a4cd6d9 in __GI___poll (fds=0x7fba18004e10, nfds=1, timeout=10198) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fba48e93136 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fba48e9325c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fba4a9f0153 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fba4a99d14b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fba4a7ec106 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fba4a7f5cd7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fba49703164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007fba4a4d9def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fba356f1700 (LWP 3754)):
#0  0x00007fba4a4cd6d9 in __GI___poll (fds=0x7fba10004db0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fba48e93136 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fba48e9325c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fba4a9f016b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fba4a99d14b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fba4a7ec106 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fba4c2dd4d6 in  () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fba4a7f5cd7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fba49703164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#9  0x00007fba4a4d9def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fba3e270700 (LWP 3749)):
#0  0x00007fba4a4cd6d9 in __GI___poll (fds=0x7fba30004a00, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fba48e93136 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fba48e9325c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fba4a9f016b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fba4a99d14b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fba4a7ec106 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fba4b122375 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fba4a7f5cd7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fba49703164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#9  0x00007fba4a4d9def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fba3f481700 (LWP 3748)):
#0  0x00007fba4a4cd6d9 in __GI___poll (fds=0x7fba38018f80, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fba48e93136 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fba48e9325c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fba4a9f016b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fba4a99d14b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fba4a7ec106 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fba4be68545 in  () at /lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007fba4a7f5cd7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fba49703164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#9  0x00007fba4a4d9def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fba44d5e700 (LWP 3747)):
#0  0x00007fba4a4cd6d9 in __GI___poll (fds=0x7fba44d5dcb8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fba48db4917 in  () at /lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fba48db653a in xcb_wait_for_event () at /lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fba45ef4519 in  () at /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007fba4a7f5cd7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fba49703164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007fba4a4d9def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fba46654800 (LWP 3746)):
[KCrash Handler]
#6  0x00007fba4a9a76c5 in QMetaObject::inherits(QMetaObject const*) const () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fba4a9a7724 in QMetaObject::cast(QObject const*) const () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fba4b15dcdc in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007fba4b164ce2 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007fba4b164d82 in QQmlDelegateModel::release(QObject*) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#11 0x00007fba4b1598f9 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#12 0x00007fba4b159d86 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#13 0x00007fba4b15a090 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#14 0x00007fba4b15b2b5 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#15 0x00007fba4b08a572 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#16 0x00007fba4b087853 in QQmlPropertyPrivate::write(QObject*, QQmlPropertyData const&, QVariant const&, QQmlContextData*, QFlags<QQmlPropertyData::WriteFlag>) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#17 0x00007fba4b109b44 in QQmlBinding::slowWrite(QQmlPropertyData const&, QQmlPropertyData const&, QV4::Value const&, bool, QFlags<QQmlPropertyData::WriteFlag>) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#18 0x00007fba4b10ac70 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#19 0x00007fba4b10c23c in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#20 0x00007fba4b108833 in QQmlBinding::update(QFlags<QQmlPropertyData::WriteFlag>) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#21 0x00007fba4b0df6f3 in QQmlNotifier::emitNotify(QQmlNotifierEndpoint*, void**) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#22 0x00007fba4b07834a in QQmlData::signalEmitted(QAbstractDeclarativeData*, QObject*, int, void**) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#23 0x00007fba4a9c6fff in QMetaObject::activate(QObject*, int, int, void**) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007fba4b0df6f3 in QQmlNotifier::emitNotify(QQmlNotifierEndpoint*, void**) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#25 0x00007fba4b07834a in QQmlData::signalEmitted(QAbstractDeclarativeData*, QObject*, int, void**) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#26 0x00007fba4a9c6fff in QMetaObject::activate(QObject*, int, int, void**) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00007fba4b10e416 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#28 0x00007fba4b057b45 in QV4::Runtime::method_callProperty(QV4::ExecutionEngine*, QV4::Value*, int, QV4::Value*, int) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#29 0x00007fba4b04b0c2 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#30 0x00007fba4b1029af in QQmlJavaScriptExpression::evaluate(QV4::CallData*, bool*) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#31 0x00007fba4b094d47 in QQmlBoundSignalExpression::evaluate(void**) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#32 0x00007fba4b095edb in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#33 0x00007fba4b0df6f3 in QQmlNotifier::emitNotify(QQmlNotifierEndpoint*, void**) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#34 0x00007fba4b07834a in QQmlData::signalEmitted(QAbstractDeclarativeData*, QObject*, int, void**) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#35 0x00007fba4a9c6fff in QMetaObject::activate(QObject*, int, int, void**) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#36 0x00007fba4b159c16 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#37 0x00007fba4b15b056 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#38 0x00007fba4a9c76cb in QMetaObject::activate(QObject*, int, int, void**) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#39 0x00007fba4b1516fd in QQmlInstanceModel::createdItem(int, QObject*) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#40 0x00007fba4b1653fd in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#41 0x00007fba4b0906ff in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#42 0x00007fba4b090b9f in QQmlEnginePrivate::incubate(QQmlIncubator&, QQmlContextData*) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#43 0x00007fba4b164409 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#44 0x00007fba4b164531 in QQmlDelegateModel::object(int, QQmlIncubator::IncubationMode) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#45 0x00007fba4b15aaea in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#46 0x00007fba4b15b074 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#47 0x00007fba4a9c76cb in QMetaObject::activate(QObject*, int, int, void**) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#48 0x00007fba4b151696 in QQmlInstanceModel::modelUpdated(QQmlChangeSet const&, bool) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#49 0x00007fba4b15c2f8 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#50 0x00007fba4b161dc5 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#51 0x00007fba4b161f38 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#52 0x00007fba4b162ef1 in QQmlDelegateModel::_q_itemsInserted(int, int) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#53 0x00007fba4b168e95 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#54 0x00007fba4b1691fb in QQmlDelegateModel::qt_metacall(QMetaObject::Call, int, void**) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#55 0x00007fba4a9c779c in QMetaObject::activate(QObject*, int, int, void**) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#56 0x00007fba4a9526fe in QAbstractItemModel::rowsInserted(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#57 0x00007fba4a95a219 in QAbstractItemModel::endInsertRows() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#58 0x00007fba4c837dad in ResourcesProxyModel::sortedInsertion(QVector<AbstractResource*> const&) () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#59 0x00007fba4c839322 in ResourcesProxyModel::addResources(QVector<AbstractResource*> const&) () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#60 0x00007fba4a9c7820 in QMetaObject::activate(QObject*, int, int, void**) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#61 0x00007fba4c853af2 in ResultsStream::resourcesFound(QVector<AbstractResource*> const&) () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#62 0x00007fba4c831b74 in AggregatedResultsStream::emitResults() () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#63 0x00007fba4c831ba9 in AggregatedResultsStream::clear() () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#64 0x00007fba4c833303 in AggregatedResultsStream::destruction(QObject*) () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#65 0x00007fba4a9c7820 in QMetaObject::activate(QObject*, int, int, void**) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#66 0x00007fba4a9c7d8f in QObject::destroyed(QObject*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#67 0x00007fba4a9ce65f in QObject::~QObject() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#68 0x00007fba4c842ab9 in ResultsStream::~ResultsStream() () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#69 0x00007fba4a9c7fa0 in QObject::event(QEvent*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#70 0x00007fba4b959491 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#71 0x00007fba4b960ad0 in QApplication::notify(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#72 0x00007fba4a99e479 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#73 0x00007fba4a9a146b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#74 0x00007fba4a9f0b23 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#75 0x00007fba48e92f2e in g_main_context_dispatch () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#76 0x00007fba48e931c8 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#77 0x00007fba48e9325c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#78 0x00007fba4a9f0153 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#79 0x00007fba45f87861 in  () at /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#80 0x00007fba4a99d14b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#81 0x00007fba4a9a52c2 in QCoreApplication::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#82 0x000055fa2b2d9dea in  ()
#83 0x00007fba4a3e309b in __libc_start_main (main=0x55fa2b2d9770, argc=2, argv=0x7ffda5a24768, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffda5a24758) at ../csu/libc-start.c:308
#84 0x000055fa2b2da38a in _start ()
[Inferior 1 (process 3746) detached]

Reported using DrKonqi
Comment 1 Aleix Pol 2019-02-15 16:00:02 UTC 
Can you provide one of these packages for us to reproduce? There's not much I can see in this backtrace.
Comment 2 Christoph Feck 2019-02-22 14:23:47 UTC 

*** This bug has been marked as a duplicate of bug 403869 ***