Application: plasma-discover (5.12.8) Qt Version: 5.9.5 Frameworks Version: 5.44.0 Operating System: Linux 4.15.0-99-generic x86_64 Distribution: Ubuntu 18.04.4 LTS -- Information about the crash: - What I was doing when the application crashed: Click on Updates icon in task bar to start Discover and update system packages. The crash can be reproduced every time. -- Backtrace: Application: Discover (plasma-discover), signal: Illegal instruction Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". [Current thread is 1 (Thread 0x7fb3bd7b9800 (LWP 5259))] Thread 11 (Thread 0x7fb374cf7700 (LWP 5298)): #0 0x00007fb3b56b49f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55da5d3b6fa0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88 #1 0x00007fb3b56b49f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55da5d3b6f50, cond=0x55da5d3b6f78) at pthread_cond_wait.c:502 #2 0x00007fb3b56b49f3 in __pthread_cond_wait (cond=0x55da5d3b6f78, mutex=0x55da5d3b6f50) at pthread_cond_wait.c:655 #3 0x00007fb3b94a15ab in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #4 0x00007fb3bc8fa6a8 in () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #5 0x00007fb3bc8fab0a in () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #6 0x00007fb3b94a017d in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #7 0x00007fb3b56ae6db in start_thread (arg=0x7fb374cf7700) at pthread_create.c:463 #8 0x00007fb3b8d9b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 10 (Thread 0x7fb3754f8700 (LWP 5297)): #0 0x00007fb3b8d8ebf9 in __GI___poll (fds=0x7fb368015fc0, nfds=1, timeout=96802) at ../sysdeps/unix/sysv/linux/poll.c:29 #1 0x00007fb3b357f5c9 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007fb3b357f6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007fb3b96d78ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #4 0x00007fb3b967c90a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007fb3b949b23a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #6 0x00007fb3b94a017d in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #7 0x00007fb3b56ae6db in start_thread (arg=0x7fb3754f8700) at pthread_create.c:463 #8 0x00007fb3b8d9b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 9 (Thread 0x7fb37610f700 (LWP 5269)): #0 0x00007fb3b8d8a0b4 in __GI___libc_read (fd=37, buf=0x7fb37610ecd0, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27 #1 0x00007fb3b35c42b0 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007fb3b357f0b7 in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007fb3b357f570 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #4 0x00007fb3b357f962 in g_main_loop_run () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #5 0x00007fb377d30276 in () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0 #6 0x00007fb3b35a7175 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #7 0x00007fb3b56ae6db in start_thread (arg=0x7fb37610f700) at pthread_create.c:463 #8 0x00007fb3b8d9b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 8 (Thread 0x7fb376910700 (LWP 5268)): #0 0x00007fb3b8d8ebf9 in __GI___poll (fds=0x55da5c546210, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29 #1 0x00007fb3b357f5c9 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007fb3b357f6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007fb3b357f721 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #4 0x00007fb3b35a7175 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #5 0x00007fb3b56ae6db in start_thread (arg=0x7fb376910700) at pthread_create.c:463 #6 0x00007fb3b8d9b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 7 (Thread 0x7fb386c21700 (LWP 5265)): #0 0x00007fb3b35c5629 in g_mutex_lock () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #1 0x00007fb3b357f58e in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007fb3b357f6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007fb3b96d78ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #4 0x00007fb3b967c90a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007fb3b949b23a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #6 0x00007fb3b94a017d in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #7 0x00007fb3b56ae6db in start_thread (arg=0x7fb386c21700) at pthread_create.c:463 #8 0x00007fb3b8d9b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 6 (Thread 0x7fb387fff700 (LWP 5264)): #0 0x00007fb3b8d8a0b4 in __GI___libc_read (fd=25, buf=0x7fb387ffeb90, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27 #1 0x00007fb3b35c42b0 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007fb3b357f0b7 in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007fb3b357f570 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #4 0x00007fb3b357f6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #5 0x00007fb3b96d78ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #6 0x00007fb3b967c90a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #7 0x00007fb3b949b23a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #8 0x00007fb3b94a017d in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #9 0x00007fb3b56ae6db in start_thread (arg=0x7fb387fff700) at pthread_create.c:463 #10 0x00007fb3b8d9b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 5 (Thread 0x7fb38daa9700 (LWP 5263)): #0 0x00007fff3fbfc979 in () #1 0x00007fff3fbfcc30 in clock_gettime () #2 0x00007fb3b8daaea6 in __GI___clock_gettime (clock_id=1, tp=0x7fb38daa8aa0) at ../sysdeps/unix/clock_gettime.c:115 #3 0x00007fb3b96d71c1 in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #4 0x00007fb3b96d59f9 in QTimerInfoList::updateCurrentTime() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007fb3b96d5fd5 in QTimerInfoList::timerWait(timespec&) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #6 0x00007fb3b96d761e in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #7 0x00007fb3b357eb28 in g_main_context_prepare () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #8 0x00007fb3b357f4fb in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #9 0x00007fb3b357f6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #10 0x00007fb3b96d78ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #11 0x00007fb3b967c90a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #12 0x00007fb3b949b23a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #13 0x00007fb3bc87b2a6 in () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5 #14 0x00007fb3b94a017d in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #15 0x00007fb3b56ae6db in start_thread (arg=0x7fb38daa9700) at pthread_create.c:463 #16 0x00007fb3b8d9b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 4 (Thread 0x7fb39cc78700 (LWP 5262)): #0 0x00007fb3b8d8ebf9 in __GI___poll (fds=0x7fb390004a00, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29 #1 0x00007fb3b357f5c9 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007fb3b357f6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007fb3b96d78ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #4 0x00007fb3b967c90a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007fb3b949b23a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #6 0x00007fb3ba0b16f5 in () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #7 0x00007fb3b94a017d in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #8 0x00007fb3b56ae6db in start_thread (arg=0x7fb39cc78700) at pthread_create.c:463 #9 0x00007fb3b8d9b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 3 (Thread 0x7fb39de89700 (LWP 5261)): #0 0x00007fb3b8d8ebf9 in __GI___poll (fds=0x7fb398018fe0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29 #1 0x00007fb3b357f5c9 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007fb3b357f6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007fb3b96d78ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #4 0x00007fb3b967c90a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007fb3b949b23a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #6 0x00007fb3ba88cd45 in () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5 #7 0x00007fb3b94a017d in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #8 0x00007fb3b56ae6db in start_thread (arg=0x7fb39de89700) at pthread_create.c:463 #9 0x00007fb3b8d9b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 2 (Thread 0x7fb3ab559700 (LWP 5260)): #0 0x00007fb3b8d8ebf9 in __GI___poll (fds=0x7fb3ab558ca8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29 #1 0x00007fb3b3316747 in () at /usr/lib/x86_64-linux-gnu/libxcb.so.1 #2 0x00007fb3b331836a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1 #3 0x00007fb3ae3065e9 in () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5 #4 0x00007fb3b94a017d in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #5 0x00007fb3b56ae6db in start_thread (arg=0x7fb3ab559700) at pthread_create.c:463 #6 0x00007fb3b8d9b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 1 (Thread 0x7fb3bd7b9800 (LWP 5259)): [KCrash Handler] #6 0x00007fb3b976c5e0 in QArrayData::shared_null () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #7 0x00007fb3bc4fe883 in Category::blacklistPluginsInVector(QSet<QString> const&, QVector<Category*>&) () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so #8 0x00007fb3bc4fe75d in Category::blacklistPlugins(QSet<QString> const&) () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so #9 0x00007fb3bc4fe8ca in Category::blacklistPluginsInVector(QSet<QString> const&, QVector<Category*>&) () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so #10 0x00007fb3bc501f21 in CategoryModel::blacklistPlugin(QString const&) () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so #11 0x00007fb3bc5116a4 in ResourcesModel::callerFetchingChanged() () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so #12 0x00007fb3b96ad66f in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #13 0x00007fb38c919a43 in KNSBackend::setFetching(bool) () at /usr/lib/x86_64-linux-gnu/qt5/plugins/discover/kns-backend.so #14 0x00007fb38c919bee in KNSBackend::markInvalid(QString const&) () at /usr/lib/x86_64-linux-gnu/qt5/plugins/discover/kns-backend.so #15 0x00007fb38c919fbe in () at /usr/lib/x86_64-linux-gnu/qt5/plugins/discover/kns-backend.so #16 0x00007fb3b96ad66f in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #17 0x00007fb38c6bfc75 in KNSCore::Engine::signalError(QString const&) () at /usr/lib/x86_64-linux-gnu/libKF5NewStuffCore.so.5 #18 0x00007fb3b96ad66f in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #19 0x00007fb38c6c04b5 in KNSCore::Provider::signalError(QString const&) const () at /usr/lib/x86_64-linux-gnu/libKF5NewStuffCore.so.5 #20 0x00007fb38c6b6696 in () at /usr/lib/x86_64-linux-gnu/libKF5NewStuffCore.so.5 #21 0x00007fb3b96ad66f in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #22 0x00007fb3b7e2583f in Attica::BaseJob::finished(Attica::BaseJob*) () at /usr/lib/x86_64-linux-gnu/libKF5Attica.so.5 #23 0x00007fb3b7dd9d5b in Attica::BaseJob::dataFinished() () at /usr/lib/x86_64-linux-gnu/libKF5Attica.so.5 #24 0x00007fb3b7e25afa in () at /usr/lib/x86_64-linux-gnu/libKF5Attica.so.5 #25 0x00007fb3b96ad555 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #26 0x00007fb3b6c8075f in () at /usr/lib/x86_64-linux-gnu/libQt5Network.so.5 #27 0x00007fb3b6d10d49 in () at /usr/lib/x86_64-linux-gnu/libQt5Network.so.5 #28 0x00007fb3b96ae0c2 in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #29 0x00007fb3bb95283c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5 #30 0x00007fb3bb95a104 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5 #31 0x00007fb3b967e8d8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #32 0x00007fb3b968104d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #33 0x00007fb3b96d8263 in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #34 0x00007fb3b357f417 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #35 0x00007fb3b357f650 in () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #36 0x00007fb3b357f6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #37 0x00007fb3b96d788f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #38 0x00007fb3b967c90a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #39 0x00007fb3b96859b4 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #40 0x000055da59b00148 in () #41 0x00007fb3b8c9bb97 in __libc_start_main (main=0x55da59aff870, argc=1, argv=0x7fff3fbba748, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff3fbba738) at ../csu/libc-start.c:310 #42 0x000055da59b003ca in _start () Reported using DrKonqi
Please upgrade to Kubuntu 20.04, which is an LTS release like 18.04 and ships a much newer version of Discover that is less crashy. Thanks! *** This bug has been marked as a duplicate of bug 401435 ***
(In reply to Nate Graham from comment #1) > Please upgrade to Kubuntu 20.04, which is an LTS release like 18.04 and > ships a much newer version of Discover that is less crashy. Thanks! > > *** This bug has been marked as a duplicate of bug 401435 *** After some googling, there doesn't appear to be ab upgrade path from Kubuntu 18.04 LTS to 20.04 LTS yet, not until this Summer at least? But I do have other tools beasides Discover for OS updates.