Bug 377314

Summary:	Crash when clicking on a GTK3.x Theme
Product:	[Applications] Discover	Reporter:	Russell Greene <russellgreene8>
Component:	discover	Assignee:	Aleix Pol <aleixpol>
Status:	RESOLVED FIXED
Severity:	crash	CC:	arojas
Priority:	NOR	Keywords:	drkonqi
Version First Reported In:	5.9.3
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:	https://commits.kde.org/discover/1cb2ba38a6e843502e582e4d8f4df5b9cd702e56	Version Fixed/Implemented In:
Sentry Crash Report:

Description Russell Greene 2017-03-06 23:41:12 UTC

Application: plasma-discover (5.9.3)

Qt Version: 5.8.0
Frameworks Version: 5.31.0
Operating System: Linux 4.9.11-1-ARCH x86_64
Distribution (Platform): Archlinux Packages

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

If you go plasma addons->GTK3.x themes->and click on any of the themes it crahses.

-- Backtrace:
Application: Discover (plasma-discover), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f4a30e767c0 (LWP 5560))]

Thread 10 (Thread 0x7f49637fe700 (LWP 5617)):
#0  0x00007f4a28ec04b8 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f4a0d094e44 in  () at /usr/lib/libGLX_nvidia.so.0
#2  0x00007f4a06fd5394 in  () at /usr/lib/libnvidia-glcore.so.378.13
#3  0x00007f4a0d09412c in  () at /usr/lib/libGLX_nvidia.so.0
#4  0x00007f4a28eba454 in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007f4a2c3677df in clone () at /usr/lib/libc.so.6

Thread 9 (Thread 0x7f4963fff700 (LWP 5616)):
#0  0x00007f4a28ec010f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f4a2cd5758b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007f4a3022f665 in  () at /usr/lib/libQt5Quick.so.5
#3  0x00007f4a3022ff72 in  () at /usr/lib/libQt5Quick.so.5
#4  0x00007f4a2cd566d8 in  () at /usr/lib/libQt5Core.so.5
#5  0x00007f4a28eba454 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f4a2c3677df in clone () at /usr/lib/libc.so.6

Thread 8 (Thread 0x7f49fd543700 (LWP 5572)):
#0  0x00007f4a26f90753 in  () at /usr/lib/libglib-2.0.so.0
#1  0x00007f4a26f92d73 in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0
#2  0x00007f4a26f936cb in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007f4a26f938bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#4  0x00007f4a2cf8606b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f4a2cf2f89a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007f4a2cd51a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#7  0x00007f4a2cd566d8 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f4a28eba454 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f4a2c3677df in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7f49ffbd4700 (LWP 5568)):
#0  0x00007f4a2c35e48d in poll () at /usr/lib/libc.so.6
#1  0x00007f4a26f937a6 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f4a26f938bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f4a2cf8606b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f4a2cf2f89a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f4a2cd51a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f4a2cd566d8 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f4a28eba454 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f4a2c3677df in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7f4a0530b700 (LWP 5567)):
#0  0x00007f4a2cf85603 in  () at /usr/lib/libQt5Core.so.5
#1  0x00007f4a26f92c8d in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0
#2  0x00007f4a26f936cb in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007f4a26f938bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#4  0x00007f4a2cf8606b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f4a2cf2f89a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007f4a2cd51a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#7  0x00007f4a301bdfd6 in  () at /usr/lib/libQt5Quick.so.5
#8  0x00007f4a2cd566d8 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007f4a28eba454 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007f4a2c3677df in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7f4a0cddc700 (LWP 5565)):
#0  0x00007f4a28ec04b8 in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f4a0d094e44 in  () at /usr/lib/libGLX_nvidia.so.0
#2  0x00007f4a06fd5394 in  () at /usr/lib/libnvidia-glcore.so.378.13
#3  0x00007f4a0d09412c in  () at /usr/lib/libGLX_nvidia.so.0
#4  0x00007f4a28eba454 in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007f4a2c3677df in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7f4a0ffff700 (LWP 5563)):
#0  0x00007ffc98fe8bd0 in clock_gettime ()
#1  0x00007f4a2c3746b6 in clock_gettime () at /usr/lib/libc.so.6
#2  0x00007f4a2cf85201 in  () at /usr/lib/libQt5Core.so.5
#3  0x00007f4a2cf839c9 in QTimerInfoList::updateCurrentTime() () at /usr/lib/libQt5Core.so.5
#4  0x00007f4a2cf83f75 in QTimerInfoList::timerWait(timespec&) () at /usr/lib/libQt5Core.so.5
#5  0x00007f4a2cf8563e in  () at /usr/lib/libQt5Core.so.5
#6  0x00007f4a26f92c8d in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0
#7  0x00007f4a26f936cb in  () at /usr/lib/libglib-2.0.so.0
#8  0x00007f4a26f938bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#9  0x00007f4a2cf8606b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#10 0x00007f4a2cf2f89a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#11 0x00007f4a2cd51a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#12 0x00007f4a2d8fd025 in  () at /usr/lib/libQt5Qml.so.5
#13 0x00007f4a2cd566d8 in  () at /usr/lib/libQt5Core.so.5
#14 0x00007f4a28eba454 in start_thread () at /usr/lib/libpthread.so.0
#15 0x00007f4a2c3677df in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f4a159bc700 (LWP 5562)):
#0  0x00007f4a2cd4d8a9 in QMutex::lock() () at /usr/lib/libQt5Core.so.5
#1  0x00007f4a2cf857df in  () at /usr/lib/libQt5Core.so.5
#2  0x00007f4a26f92c8d in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0
#3  0x00007f4a26f936cb in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007f4a26f938bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#5  0x00007f4a2cf8606b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007f4a2cf2f89a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#7  0x00007f4a2cd51a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#8  0x00007f4a2ebcf125 in  () at /usr/lib/libQt5DBus.so.5
#9  0x00007f4a2cd566d8 in  () at /usr/lib/libQt5Core.so.5
#10 0x00007f4a28eba454 in start_thread () at /usr/lib/libpthread.so.0
#11 0x00007f4a2c3677df in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f4a1e3c4700 (LWP 5561)):
#0  0x00007f4a2c35e48d in poll () at /usr/lib/libc.so.6
#1  0x00007f4a26d2c8e0 in  () at /usr/lib/libxcb.so.1
#2  0x00007f4a26d2e679 in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007f4a20f5b239 in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007f4a2cd566d8 in  () at /usr/lib/libQt5Core.so.5
#5  0x00007f4a28eba454 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f4a2c3677df in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f4a30e767c0 (LWP 5560)):
[KCrash Handler]
#6  0x00007f4a2cf65427 in QObject::setProperty(char const*, QVariant const&) () at /usr/lib/libQt5Core.so.5
#7  0x00007f4a042ed244 in  () at /usr/lib/qt/plugins/discover/kns-backend.so
#8  0x00007f4a2fe5b001 in ReviewsModel::restartFetching() () at /usr/lib/plasma-discover/libDiscoverCommon.so
#9  0x00007f4a2fe81555 in  () at /usr/lib/plasma-discover/libDiscoverCommon.so
#10 0x00007f4a2cf5dba9 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#11 0x00007f4a2e4b234c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#12 0x00007f4a2e4b9b61 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#13 0x00007f4a2cf31440 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#14 0x00007f4a2cf33bcd in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#15 0x00007f4a2cf85c43 in  () at /usr/lib/libQt5Core.so.5
#16 0x00007f4a26f935a7 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#17 0x00007f4a26f93810 in  () at /usr/lib/libglib-2.0.so.0
#18 0x00007f4a26f938bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#19 0x00007f4a2cf8604f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#20 0x00007f4a2cf2f89a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#21 0x00007f4a2cf37de4 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#22 0x000000000040d5d9 in  ()
#23 0x00007f4a2c29f291 in __libc_start_main () at /usr/lib/libc.so.6
#24 0x000000000040db5a in _start ()

Reported using DrKonqi

Comment 1 Aleix Pol 2017-03-07 14:06:04 UTC

Can you reproduce? Is it possible to get a backtrace with symbols?

Comment 2 Antonio Rojas 2017-03-07 16:16:16 UTC

Thread 1 "plasma-discover" received signal SIGSEGV, Segmentation fault.
0x00007ffff3ffb427 in QObject::setProperty(char const*, QVariant const&) () from /usr/lib/libQt5Core.so.5
(gdb) bt
#0  0x00007ffff3ffb427 in QObject::setProperty(char const*, QVariant const&) () at /usr/lib/libQt5Core.so.5
#1  0x00007fffc51aef57 in KNSReviews::fetchReviews(AbstractResource*, int) (this=0x2506ef0, app=<optimized out>, page=<optimized out>) at /build/discover/src/discover-5.9.3/libdiscover/backends/KNSBackend/KNSReviews.cpp:81
#2  0x00007ffff6ef18f1 in ReviewsModel::restartFetching() (this=0xa4c8db0)
    at /build/discover/src/discover-5.9.3/libdiscover/ReviewsBackend/ReviewsModel.cpp:131
#3  0x00007ffff6f1a5f5 in ReviewsModel::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>)
    at /build/discover/src/build/libdiscover/DiscoverCommon_automoc.dir/moc_ReviewsModel_D5L2RFTOQ7EV5V.cpp:140
#4  0x00007ffff3ff3ba9 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#5  0x00007ffff554834c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#6  0x00007ffff554fb61 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#7  0x00007ffff3fc7440 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#8  0x00007ffff3fc9bcd in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) ()
    at /usr/lib/libQt5Core.so.5
#9  0x00007ffff401bc43 in  () at /usr/lib/libQt5Core.so.5
#10 0x00007fffee02f5a7 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#11 0x00007fffee02f810 in  () at /usr/lib/libglib-2.0.so.0
#12 0x00007fffee02f8bc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#13 0x00007ffff401c04f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
    at /usr/lib/libQt5Core.so.5
#14 0x00007ffff3fc589a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#15 0x00007ffff3fcdde4 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#16 0x000000000040d958 in main(int, char**) (argc=<optimized out>, argv=<optimized out>)
    at /build/discover/src/discover-5.9.3/discover/main.cpp:141

Let me know if you also need Qt symbols.

Comment 3 Aleix Pol 2017-03-10 16:16:37 UTC

Git commit 1cb2ba38a6e843502e582e4d8f4df5b9cd702e56 by Aleix Pol.
Committed on 10/03/2017 at 16:16.
Pushed by apol into branch 'Plasma/5.9'.

Account for requestComments sometimes returning a nullptr

M  +4    -0    libdiscover/backends/KNSBackend/KNSReviews.cpp

https://commits.kde.org/discover/1cb2ba38a6e843502e582e4d8f4df5b9cd702e56