Bug 389001

Summary: plasma-discover crashes after installing flatpak backend
Product: [KDE Neon] neon Reporter: Markus Heß <hessi88>
Component: generalAssignee: Neon Bugs <neon-bugs>
Status: RESOLVED WORKSFORME    
Severity: crash CC: jr, jsardid, marcus, neon-bugs, sitter
Priority: NOR Keywords: drkonqi
Version: unspecified   
Target Milestone: ---   
Platform: Neon   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description Markus Heß 2018-01-15 12:39:47 UTC 
Application: plasma-discover (5.11.0)

Qt Version: 5.9.3
Frameworks Version: 5.42.0
Operating System: Linux 4.13.0-26-generic x86_64
Distribution: KDE neon User Edition 5.11

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

I installed the plasma-discover flatpak backend and tried to start plasma-discover but it crashed immediately.

- Package versions:

flatpack (0.10.2.1-0alexlarsson1~xenial)
plasma-discover (4:5.11.0-0neon+16.04+xenial+build83)
plasma-discover-flatpak-backend (5.11.5-0neon+16.04+xenial+build96)

The crash can be reproduced every time.

-- Backtrace:
Application: Entdecken (plasma-discover), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f6da182f8c0 (LWP 6550))]

Thread 10 (Thread 0x7f6d65c23700 (LWP 6559)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x00007f6d9d6e5596 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f6d9d6e0dea in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f6d9d6e4709 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f6d998916ba in start_thread (arg=0x7f6d65c23700) at pthread_create.c:333
#5  0x00007f6d9ccea3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7f6d66424700 (LWP 6558)):
#0  0x00007f6d9ccda24d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f6d97a4b6f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d97a07e74 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d97a08330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6d97a0849c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f6d9d90e6cb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f6d9d8b6e2a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f6d9d6df8f4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f6d9d6e4709 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f6d998916ba in start_thread (arg=0x7f6d66424700) at pthread_create.c:333
#10 0x00007f6d9ccea3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f6d6795d700 (LWP 6557)):
#0  0x00007f6d9ccde70d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f6d97a0838c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d97a0849c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d9d90e6cb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f6d9d8b6e2a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f6d9d6df8f4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f6d9d6e4709 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f6d998916ba in start_thread (arg=0x7f6d6795d700) at pthread_create.c:333
#8  0x00007f6d9ccea3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f6d6ca84700 (LWP 6556)):
#0  0x00007f6d9ccda24d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f6d97a4b6f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d97a07e74 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d97a08330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6d97a08712 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f6d6e45c9d6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#6  0x00007f6d97a2ebb5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f6d998916ba in start_thread (arg=0x7f6d6ca84700) at pthread_create.c:333
#8  0x00007f6d9ccea3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f6d6d285700 (LWP 6555)):
#0  0x00007f6d9ccde70d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f6d97a0838c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d97a0849c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d97a084d9 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6d97a2ebb5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f6d998916ba in start_thread (arg=0x7f6d6d285700) at pthread_create.c:333
#6  0x00007f6d9ccea3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f6d77392700 (LWP 6554)):
#0  0x00007f6d9ccda24d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f6d97a4b6f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d97a07e74 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d97a08330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6d97a0849c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f6d9d90e6cb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f6d9d8b6e2a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f6d9d6df8f4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f6da0b74046 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9  0x00007f6d9d6e4709 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f6d998916ba in start_thread (arg=0x7f6d77392700) at pthread_create.c:333
#11 0x00007f6d9ccea3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f6d7ffff700 (LWP 6553)):
#0  0x00007f6d9ccde70d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f6d97a0838c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d97a0849c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d9d90e6cb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f6d9d8b6e2a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f6d9d6df8f4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f6d9e2e0d25 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f6d9d6e4709 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f6d998916ba in start_thread (arg=0x7f6d7ffff700) at pthread_create.c:333
#9  0x00007f6d9ccea3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f6d855ed700 (LWP 6552)):
#0  0x00007f6d9ccde70d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f6d97a0838c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d97a0849c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d9d90e6cb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f6d9d8b6e2a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f6d9d6df8f4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f6d9fa6c315 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f6d9d6e4709 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f6d998916ba in start_thread (arg=0x7f6d855ed700) at pthread_create.c:333
#9  0x00007f6d9ccea3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f6d8e5be700 (LWP 6551)):
#0  0x00007f6d9ccde70d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f6d977a5c62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f6d977a78d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f6d90b151f9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f6d9d6e4709 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f6d998916ba in start_thread (arg=0x7f6d8e5be700) at pthread_create.c:333
#6  0x00007f6d9ccea3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f6da182f8c0 (LWP 6550)):
[KCrash Handler]
#6  0x00007f6da0819946 in StandardBackendUpdater::refreshUpdateable() () from /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#7  0x00007f6d9d8e55a6 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f6d64bf009e in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/discover/flatpak-backend.so
#9  0x00007f6d64bf0690 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/discover/flatpak-backend.so
#10 0x00007f6d64bf699b in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/discover/flatpak-backend.so
#11 0x00007f6da08208d0 in DiscoverBackendsFactory::backendForFile(QString const&, QString const&) const () from /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#12 0x00007f6da0820f52 in DiscoverBackendsFactory::backend(QString const&) const () from /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#13 0x00007f6da08213b6 in DiscoverBackendsFactory::allBackends() const () from /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#14 0x00007f6da080d8b7 in ResourcesModel::registerAllBackends() () from /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#15 0x00007f6da082f1d5 in ?? () from /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#16 0x00007f6d9d8e62b9 in QObject::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007f6d9eea5b9c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#18 0x00007f6d9eead5a7 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#19 0x00007f6d9d8b8df8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007f6d9d8bb5db in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007f6d9d90f0a3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007f6d97a08197 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f6d97a083f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f6d97a0849c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f6d9d90e6af in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007f6d9d8b6e2a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00007f6d9d8bfd64 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x0000000000411b9e in ?? ()
#29 0x00007f6d9cc03830 in __libc_start_main (main=0x411180, argc=1, argv=0x7ffc4a568b08, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc4a568af8) at ../csu/libc-start.c:291
#30 0x0000000000411cb9 in _start ()

Reported using DrKonqi
Comment 1 Aleix Pol 2018-01-15 14:39:23 UTC 
Would it be possible to get a backtrace with symbols? (i.e. please install -dbgsym package)
Comment 2 Markus Heß 2018-01-15 16:47:40 UTC 
Ok, I tried to install the dbgsym-packages and noticed that there was a version mismatch. Somehow, plasma-discover did not update correctly but apt told me that everything is up to date. I don't know why this happened. I removed all the plasma-discover packages and reinstalled them again. Now it starts without crashing.
Comment 3 Marcus Harrison 2018-02-07 19:36:18 UTC 
Hello,

I just ran into the same issue with the same solution. Is the plasma-discover upgrade path broken somehow? I've been upgrading my packages pretty blindly when they become available.

Cheers.
Comment 4 Aleix Pol 2018-02-08 01:20:29 UTC 
Moving to neon, another person told me something similar.
Comment 5 avlas 2018-02-10 14:15:56 UTC 
Same here. I didn't realize of the version mismatch. Thanks
Comment 6 Justin Zobel 2020-12-17 05:33:47 UTC 
Thank you for the crash report.

As it has been a while since this was reported, can you please test and confirm if this issue is still occurring or if this bug report can be marked as resolved.

I have set the bug status to "needsinfo" pending your response, please change back to "reported" or "resolved/worksforme" when you respond, thank you.
Comment 7 Bug Janitor Service 2021-01-01 04:37:55 UTC 
Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!
Comment 8 Bug Janitor Service 2021-01-16 04:36:49 UTC 
This bug has been in NEEDSINFO status with no change for at least
30 days. The bug is now closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

Thank you for helping us make KDE software even better for everyone!