Bug 381019

Application: plasma-discover (5.10.1)

Qt Version: 5.9.0
Frameworks Version: 5.34.0
Operating System: Linux 4.11.3-1-ARCH x86_64
Distribution (Platform): Archlinux Packages

-- Information about the crash:
- Custom settings of the application:
Installed via "plasma" package on Arch Linux, which does not include flatpak as a dependency.

The crash can be reproduced every time.

-- Backtrace:
Application: Discover (plasma-discover), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f97f58437c0 (LWP 28441))]

Thread 5 (Thread 0x7f97c9b8d700 (LWP 28452)):
#0  0x00007f97eb7181c9 in g_mutex_lock () at /usr/lib/libglib-2.0.so.0
#1  0x00007f97eb6d2536 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#2  0x00007f97eb6d2a20 in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007f97eb6d2acc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#4  0x00007f97f1914e9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f97f18bb21a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007f97f16dd40a in QThread::exec() () at /usr/lib/libQt5Core.so.5
#7  0x00007f97f4b8c836 in  () at /usr/lib/libQt5Quick.so.5
#8  0x00007f97f16e1cbd in  () at /usr/lib/libQt5Core.so.5
#9  0x00007f97ed830297 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007f97f0ff625f in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7f97d907b700 (LWP 28445)):
#0  0x00007f97eb7181e4 in g_mutex_unlock () at /usr/lib/libglib-2.0.so.0
#1  0x00007f97eb6d21b9 in g_main_context_query () at /usr/lib/libglib-2.0.so.0
#2  0x00007f97eb6d2928 in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007f97eb6d2acc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#4  0x00007f97f1914e9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f97f18bb21a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007f97f16dd40a in QThread::exec() () at /usr/lib/libQt5Core.so.5
#7  0x00007f97f2296645 in  () at /usr/lib/libQt5Qml.so.5
#8  0x00007f97f16e1cbd in  () at /usr/lib/libQt5Core.so.5
#9  0x00007f97ed830297 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007f97f0ff625f in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f97da28c700 (LWP 28444)):
#0  0x00007f97eb7181e4 in g_mutex_unlock () at /usr/lib/libglib-2.0.so.0
#1  0x00007f97eb6d2ad6 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#2  0x00007f97f1914e9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007f97f18bb21a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f97f16dd40a in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007f97f3a41d45 in  () at /usr/lib/libQt5DBus.so.5
#6  0x00007f97f16e1cbd in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f97ed830297 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f97f0ff625f in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f97e2ca5700 (LWP 28443)):
#0  0x00007f97f0fec2bd in poll () at /usr/lib/libc.so.6
#1  0x00007f97eb46b8e0 in  () at /usr/lib/libxcb.so.1
#2  0x00007f97eb46d679 in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007f97e583bd49 in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007f97f16e1cbd in  () at /usr/lib/libQt5Core.so.5
#5  0x00007f97ed830297 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f97f0ff625f in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f97f58437c0 (LWP 28441)):
[KCrash Handler]
#6  0x00007f97f571c10d in do_lookup_x () at /lib64/ld-linux-x86-64.so.2
#7  0x00007f97f571ccbf in _dl_lookup_symbol_x () at /lib64/ld-linux-x86-64.so.2
#8  0x00007f97f571e769 in _dl_relocate_object () at /lib64/ld-linux-x86-64.so.2
#9  0x00007f97f57265e3 in dl_open_worker () at /lib64/ld-linux-x86-64.so.2
#10 0x00007f97f102fc94 in _dl_catch_error () at /usr/lib/libc.so.6
#11 0x00007f97f5725f29 in _dl_open () at /lib64/ld-linux-x86-64.so.2
#12 0x00007f97eb99cf26 in  () at /usr/lib/libdl.so.2
#13 0x00007f97f102fc94 in _dl_catch_error () at /usr/lib/libc.so.6
#14 0x00007f97eb99d5f5 in  () at /usr/lib/libdl.so.2
#15 0x00007f97eb99cfb1 in dlopen () at /usr/lib/libdl.so.2
#16 0x00007f97f18b8b8c in  () at /usr/lib/libQt5Core.so.5
#17 0x00007f97f18b2245 in  () at /usr/lib/libQt5Core.so.5
#18 0x00007f97f18a0348 in QPluginLoader::instance() () at /usr/lib/libQt5Core.so.5
#19 0x00007f97f48372df in DiscoverBackendsFactory::backendForFile(QString const&, QString const&) const () at /usr/lib/plasma-discover/libDiscoverCommon.so
#20 0x00007f97f48379bb in DiscoverBackendsFactory::backend(QString const&) const () at /usr/lib/plasma-discover/libDiscoverCommon.so
#21 0x00007f97f4837b34 in DiscoverBackendsFactory::allBackends() const () at /usr/lib/plasma-discover/libDiscoverCommon.so
#22 0x00007f97f4823b6a in ResourcesModel::registerAllBackends() () at /usr/lib/plasma-discover/libDiscoverCommon.so
#23 0x00007f97f18ebe72 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#24 0x00007f97f2e7746c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#25 0x00007f97f2e7ecf4 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#26 0x00007f97f18bcb98 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#27 0x00007f97f18bf02d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#28 0x00007f97f1914a63 in  () at /usr/lib/libQt5Core.so.5
#29 0x00007f97eb6d27b7 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#30 0x00007f97eb6d2a20 in  () at /usr/lib/libglib-2.0.so.0
#31 0x00007f97eb6d2acc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#32 0x00007f97f1914e7f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#33 0x00007f97f18bb21a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#34 0x00007f97f18c3a74 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#35 0x000000000040d2b8 in  ()
#36 0x00007f97f0f2943a in __libc_start_main () at /usr/lib/libc.so.6
#37 0x000000000040d58a in _start ()

Possible duplicates by query: bug 380498, bug 380496.

Reported using DrKonqi