Bug 384318

Application: plasma-discover (5.10.5)

Qt Version: 5.9.1
Frameworks Version: 5.37.0
Operating System: Linux 4.12.8-2-ARCH x86_64
Distribution (Platform): Archlinux Packages

-- Information about the crash:
Discover crashes on latest Arch Linux KDE stable updates from the main repository. When it works, it loads really slowly and most of the added popular themes and extensions don't seem to be installed at all.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Discover (plasma-discover), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f41b4e77e40 (LWP 1913))]

Thread 11 (Thread 0x7f41727ca700 (LWP 1925)):
#0  0x00007f41b0571029 in syscall () at /usr/lib/libc.so.6
#1  0x00007f41b08be0e7 in __cxxabiv1::__cxa_guard_acquire(__cxxabiv1::__guard*) (g=0x7f41af52d168) at /build/gcc/src/gcc/libstdc++-v3/libsupc++/guard.cc:302
#2  0x00007f41af27f94d in  () at /usr/lib/libQt5Network.so.5
#3  0x00007f41af27246c in  () at /usr/lib/libQt5Network.so.5
#4  0x00007f41b0c5e341 in  () at /usr/lib/libQt5Core.so.5
#5  0x00007f41b0c6215b in  () at /usr/lib/libQt5Core.so.5
#6  0x00007f41acdb3049 in start_thread () at /usr/lib/libpthread.so.0
#7  0x00007f41b0575f0f in clone () at /usr/lib/libc.so.6

Thread 10 (Thread 0x7f4172fcb700 (LWP 1924)):
[KCrash Handler]
#5  0x00007f41b4cbb8e8 in _dl_relocate_object () at /lib64/ld-linux-x86-64.so.2
#6  0x00007f41b4cc3813 in dl_open_worker () at /lib64/ld-linux-x86-64.so.2
#7  0x00007f41b05afe44 in _dl_catch_error () at /usr/lib/libc.so.6
#8  0x00007f41b4cc315a in _dl_open () at /lib64/ld-linux-x86-64.so.2
#9  0x00007f41aae9eea6 in  () at /usr/lib/libdl.so.2
#10 0x00007f41b05afe44 in _dl_catch_error () at /usr/lib/libc.so.6
#11 0x00007f41aae9f5a7 in  () at /usr/lib/libdl.so.2
#12 0x00007f41aae9ef42 in dlopen () at /usr/lib/libdl.so.2
#13 0x00007f41b0e4172e in  () at /usr/lib/libQt5Core.so.5
#14 0x00007f41b0e3af89 in QLibrary::load() () at /usr/lib/libQt5Core.so.5
#15 0x00007f41af27f349 in  () at /usr/lib/libQt5Network.so.5
#16 0x00007f41af27f95a in  () at /usr/lib/libQt5Network.so.5
#17 0x00007f41af27246c in  () at /usr/lib/libQt5Network.so.5
#18 0x00007f41b0c5e341 in  () at /usr/lib/libQt5Core.so.5
#19 0x00007f41b0c6215b in  () at /usr/lib/libQt5Core.so.5
#20 0x00007f41acdb3049 in start_thread () at /usr/lib/libpthread.so.0
#21 0x00007f41b0575f0f in clone () at /usr/lib/libc.so.6

Thread 9 (Thread 0x7f4173fff700 (LWP 1923)):
#0  0x00007f41b056be9d in poll () at /usr/lib/libc.so.6
#1  0x00007f41aabd5c09 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f41aabd5d1c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f41b0ea0084 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f41b0e43ffb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f41b0c5d40e in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f41b0c6215b in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f41acdb3049 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f41b0575f0f in clone () at /usr/lib/libc.so.6

Thread 8 (Thread 0x7f41792a1700 (LWP 1922)):
#0  0x00007f41b056be9d in poll () at /usr/lib/libc.so.6
#1  0x00007f41aabd5c09 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f41aabd5d1c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f41b0ea0084 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f41b0e43ffb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f41b0c5d40e in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f41b0c6215b in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f41acdb3049 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f41b0575f0f in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7f4183469700 (LWP 1921)):
#0  0x00007f41b056be9d in poll () at /usr/lib/libc.so.6
#1  0x00007f41aabd5c09 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f41aabd5d1c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f41b0ea0084 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f41b0e43ffb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f41b0c5d40e in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f41b411c96b in  () at /usr/lib/libQt5Quick.so.5
#7  0x00007f41b0c6215b in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f41acdb3049 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f41b0575f0f in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7f418529b700 (LWP 1919)):
#0  0x00007f41acdb91ad in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f418aad059c in  () at /usr/lib/xorg/modules/dri/r600_dri.so
#2  0x00007f418aad02a8 in  () at /usr/lib/xorg/modules/dri/r600_dri.so
#3  0x00007f41acdb3049 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f41b0575f0f in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7f41862da700 (LWP 1918)):
#0  0x00007f41acdb91ad in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f418aad059c in  () at /usr/lib/xorg/modules/dri/r600_dri.so
#2  0x00007f418aad02a8 in  () at /usr/lib/xorg/modules/dri/r600_dri.so
#3  0x00007f41acdb3049 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f41b0575f0f in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7f4193fff700 (LWP 1917)):
#0  0x00007f41b056be9d in poll () at /usr/lib/libc.so.6
#1  0x00007f41aabd5c09 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f41aabd5d1c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f41b0ea0084 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f41b0e43ffb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f41b0c5d40e in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f41b18213d9 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007f41b0c6215b in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f41acdb3049 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f41b0575f0f in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f419957c700 (LWP 1916)):
#0  0x00007f41b056be9d in poll () at /usr/lib/libc.so.6
#1  0x00007f41aabd5c09 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f41aabd5d1c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f41b0ea0084 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f41b0e43ffb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f41b0c5d40e in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f41b2fdb396 in  () at /usr/lib/libQt5DBus.so.5
#7  0x00007f41b0c6215b in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f41acdb3049 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f41b0575f0f in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f41a23a2700 (LWP 1915)):
#0  0x00007f41b056be9d in poll () at /usr/lib/libc.so.6
#1  0x00007f41aa96e8e0 in  () at /usr/lib/libxcb.so.1
#2  0x00007f41aa970679 in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007f41a4f3d72a in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007f41b0c6215b in  () at /usr/lib/libQt5Core.so.5
#5  0x00007f41acdb3049 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f41b0575f0f in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f41b4e77e40 (LWP 1913)):
#0  0x00007f41acdb91ad in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f41aa96eb57 in  () at /usr/lib/libxcb.so.1
#2  0x00007f41aa97039f in  () at /usr/lib/libxcb.so.1
#3  0x00007f41aa9704b2 in xcb_wait_for_reply () at /usr/lib/libxcb.so.1
#4  0x00007f41a4f57fcc in QXcbWindow::netWmStates() () at /usr/lib/libQt5XcbQpa.so.5
#5  0x00007f41a4f5824f in QXcbWindow::handlePropertyNotifyEvent(xcb_property_notify_event_t const*) () at /usr/lib/libQt5XcbQpa.so.5
#6  0x00007f41a4f3f530 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /usr/lib/libQt5XcbQpa.so.5
#7  0x00007f41a4f3f99e in QXcbConnection::processXcbEvents() () at /usr/lib/libQt5XcbQpa.so.5
#8  0x00007f41b0e761d2 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#9  0x00007f41b2403e4c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#10 0x00007f41b240b926 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#11 0x00007f41b0e45bd0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#12 0x00007f41b0e48426 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#13 0x00007f41b0ea0a74 in  () at /usr/lib/libQt5Core.so.5
#14 0x00007f41aabd5a57 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#15 0x00007f41aabd5c88 in  () at /usr/lib/libglib-2.0.so.0
#16 0x00007f41aabd5d1c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#17 0x00007f41b0ea0061 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#18 0x00007f41b0e43ffb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#19 0x00007f41b0e4d048 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#20 0x000055cf63570ecf in  ()
#21 0x00007f41b04a84ca in __libc_start_main () at /usr/lib/libc.so.6
#22 0x000055cf635711fa in _start ()

The reporter indicates this bug may be a duplicate of or related to bug 380496.

Possible duplicates by query: bug 384278, bug 384263, bug 383014, bug 382166, bug 381601.

Reported using DrKonqi