Bug 447156

Summary: Krunner crashed when I was finding the sum of 2 numbers
Product: [Plasma] krunner Reporter: QuantumG <suhas.ksv>
Component: calculatorAssignee: Alexander Lohnau <alexander.lohnau>
Status: RESOLVED UNMAINTAINED    
Severity: normal CC: nate, plasma-bugs
Priority: NOR    
Version: unspecified   
Target Milestone: ---   
Platform: Ubuntu   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description QuantumG 2021-12-18 06:33:59 UTC 
SUMMARY
***
NOTE: If you are reporting a crash, please try to attach a backtrace with debug symbols.
See https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports
***


STEPS TO REPRODUCE
1. 
2. 
3. 

OBSERVED RESULT


EXPECTED RESULT


SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION

Debug Information and Crash Report
Application: krunner (5.12.9)

Qt Version: 5.9.5
Frameworks Version: 5.44.0
Operating System: Linux 5.4.0-91-generic x86_64
Distribution: Ubuntu 18.04.6 LTS

-- Information about the crash:
- What I was doing when the application crashed: I was using Run application to find a simple sum of 2 numbers.

The crash can be reproduced sometimes.

-- Backtrace:
Application: krunner (krunner), signal: Aborted
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
__lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
[Current thread is 1 (Thread 0x7fc0653820c0 (LWP 1377))]

Thread 10 (Thread 0x7fc01e7fc700 (LWP 3442)):
#0  __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007fc060c970be in __GI___libc_realloc (oldmem=0x563ed0e50500, bytes=400) at malloc.c:3238
#2  0x00007fc05c8ddc90 in g_realloc () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc03008b841 in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#4  0x00007fc030091a92 in g_type_register_static () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#5  0x00007fc030091d65 in g_type_register_static_simple () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#6  0x00007fc0302e01c1 in as_suggested_get_type () from /usr/lib/x86_64-linux-gnu/libappstream.so.4
#7  0x00007fc0302e0736 in as_suggested_new () from /usr/lib/x86_64-linux-gnu/libappstream.so.4
#8  0x00007fc0302cfd5f in ?? () from /usr/lib/x86_64-linux-gnu/libappstream.so.4
#9  0x00007fc0302c8e5b in ?? () from /usr/lib/x86_64-linux-gnu/libappstream.so.4
#10 0x00007fc0302c923b in as_metadata_parse () from /usr/lib/x86_64-linux-gnu/libappstream.so.4
#11 0x00007fc0302c976d in as_metadata_parse_file () from /usr/lib/x86_64-linux-gnu/libappstream.so.4
#12 0x00007fc0302d5ea2 in ?? () from /usr/lib/x86_64-linux-gnu/libappstream.so.4
#13 0x00007fc0302d62dd in as_pool_load () from /usr/lib/x86_64-linux-gnu/libappstream.so.4
#14 0x00007fc0305127c7 in AppStream::Pool::load(QString*) () from /usr/lib/x86_64-linux-gnu/libAppStreamQt.so.2
#15 0x00007fc03072dc0d in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/appstreamrunner.so
#16 0x00007fc03072dd9e in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/appstreamrunner.so
#17 0x00007fc03072ea6f in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/appstreamrunner.so
#18 0x00007fc039cea6d0 in Plasma::AbstractRunner::performMatch(Plasma::RunnerContext&) () from /usr/lib/x86_64-linux-gnu/libKF5Runner.so.5
#19 0x00007fc039acb368 in ThreadWeaver::Executor::run(QSharedPointer<ThreadWeaver::JobInterface> const&, ThreadWeaver::Thread*) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#20 0x00007fc039ac9fd0 in ThreadWeaver::Job::execute(QSharedPointer<ThreadWeaver::JobInterface> const&, ThreadWeaver::Thread*) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#21 0x00007fc039ac9b2d in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#22 0x00007fc06142417d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007fc05ec3b6db in start_thread (arg=0x7fc01e7fc700) at pthread_create.c:463
#24 0x00007fc060d1f71f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7fc01effd700 (LWP 3441)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007fc06141b775 in QBasicMutex::lockInternal() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fc03072dad1 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/appstreamrunner.so
#3  0x00007fc03072dd9e in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/appstreamrunner.so
#4  0x00007fc03072ea6f in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/appstreamrunner.so
#5  0x00007fc039cea6d0 in Plasma::AbstractRunner::performMatch(Plasma::RunnerContext&) () from /usr/lib/x86_64-linux-gnu/libKF5Runner.so.5
#6  0x00007fc039acb368 in ThreadWeaver::Executor::run(QSharedPointer<ThreadWeaver::JobInterface> const&, ThreadWeaver::Thread*) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007fc039ac9fd0 in ThreadWeaver::Job::execute(QSharedPointer<ThreadWeaver::JobInterface> const&, ThreadWeaver::Thread*) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007fc039ac9b2d in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007fc06142417d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fc05ec3b6db in start_thread (arg=0x7fc01effd700) at pthread_create.c:463
#11 0x00007fc060d1f71f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7fc01f7fe700 (LWP 3440)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007fc06141b775 in QBasicMutex::lockInternal() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fc03072dad1 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/appstreamrunner.so
#3  0x00007fc03072dd9e in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/appstreamrunner.so
#4  0x00007fc03072ea6f in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/appstreamrunner.so
#5  0x00007fc039cea6d0 in Plasma::AbstractRunner::performMatch(Plasma::RunnerContext&) () from /usr/lib/x86_64-linux-gnu/libKF5Runner.so.5
#6  0x00007fc039acb368 in ThreadWeaver::Executor::run(QSharedPointer<ThreadWeaver::JobInterface> const&, ThreadWeaver::Thread*) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#7  0x00007fc039ac9fd0 in ThreadWeaver::Job::execute(QSharedPointer<ThreadWeaver::JobInterface> const&, ThreadWeaver::Thread*) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#8  0x00007fc039ac9b2d in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#9  0x00007fc06142417d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fc05ec3b6db in start_thread (arg=0x7fc01f7fe700) at pthread_create.c:463
#11 0x00007fc060d1f71f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7fc01ffff700 (LWP 3439)):
[KCrash Handler]
#6  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#7  0x00007fc060c3e921 in __GI_abort () at abort.c:79
#8  0x00007fc060c87967 in __libc_message (action=action@entry=do_abort, fmt=fmt@entry=0x7fc060db4b0d "%s\n") at ../sysdeps/posix/libc_fatal.c:181
#9  0x00007fc060c8e9da in malloc_printerr (str=str@entry=0x7fc060db6838 "double free or corruption (!prev)") at malloc.c:5342
#10 0x00007fc060c9148c in _int_free (av=0x7fc060fe9c40 <main_arena>, p=0x563ececbf7a0, have_lock=<optimized out>) at malloc.c:4311
#11 0x00007fc060c93b40 in _int_realloc (av=av@entry=0x7fc060fe9c40 <main_arena>, oldp=oldp@entry=0x563ececbf7a0, oldsize=oldsize@entry=272, nb=nb@entry=528) at malloc.c:4613
#12 0x00007fc060c970db in __GI___libc_realloc (oldmem=0x563ececbf7b0, bytes=512) at malloc.c:3240
#13 0x00007fc0614762d1 in QListData::realloc_grow(int) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007fc06147646a in QListData::prepend() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00007fc06163b5e7 in QObjectCleanupHandler::add(QObject*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007fc06226ba1e in KPluginFactory::KPluginFactory() () from /usr/lib/x86_64-linux-gnu/libKF5CoreAddons.so.5
#17 0x00007fc01da25c1d in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/kpackage/packagestructure/plasmoid_packagestructure.so
#18 0x00007fc01da25d15 in qt_plugin_instance () from /usr/lib/x86_64-linux-gnu/qt5/plugins/kpackage/packagestructure/plasmoid_packagestructure.so
#19 0x00007fc0615e53c6 in QPluginLoader::instance() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007fc06226f6a7 in KPluginLoader::factory() () from /usr/lib/x86_64-linux-gnu/libKF5CoreAddons.so.5
#21 0x00007fc063acf25b in KPackage::PackageLoader::loadPackageStructure(QString const&) () from /usr/lib/x86_64-linux-gnu/libKF5Package.so.5
#22 0x00007fc063ad12a6 in KPackage::PackageLoader::listPackages(QString const&, QString const&) () from /usr/lib/x86_64-linux-gnu/libKF5Package.so.5
#23 0x00007fc063ad1387 in KPackage::PackageLoader::findPackages(QString const&, QString const&, std::function<bool (KPluginMetaData const&)>) () from /usr/lib/x86_64-linux-gnu/libKF5Package.so.5
#24 0x00007fc06096c94c in Plasma::PluginLoader::listAppletMetaData(QString const&, QString const&) () from /usr/lib/x86_64-linux-gnu/libKF5Plasma.so.5
#25 0x00007fc031fbfd90 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/krunner_windowedwidgets.so
#26 0x00007fc039cea6d0 in Plasma::AbstractRunner::performMatch(Plasma::RunnerContext&) () from /usr/lib/x86_64-linux-gnu/libKF5Runner.so.5
#27 0x00007fc039acb368 in ThreadWeaver::Executor::run(QSharedPointer<ThreadWeaver::JobInterface> const&, ThreadWeaver::Thread*) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#28 0x00007fc039ac9fd0 in ThreadWeaver::Job::execute(QSharedPointer<ThreadWeaver::JobInterface> const&, ThreadWeaver::Thread*) () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#29 0x00007fc039ac9b2d in ThreadWeaver::Thread::run() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#30 0x00007fc06142417d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x00007fc05ec3b6db in start_thread (arg=0x7fc01ffff700) at pthread_create.c:463
#32 0x00007fc060d1f71f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fc02df4f700 (LWP 3370)):
#0  0x00007fc05c8d7fb7 in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fc05c8d8690 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fc05c8d8a82 in g_main_loop_run () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc02fd8e2d6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007fc05c9002a5 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fc05ec3b6db in start_thread (arg=0x7fc02df4f700) at pthread_create.c:463
#6  0x00007fc060d1f71f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fc02e750700 (LWP 3369)):
#0  0x00007fc060d0e184 in __GI___libc_read (fd=20, buf=0x7fc02e74fce0, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007fc05c91d4c0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fc05c8d81d7 in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc05c8d8690 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fc05c8d87fc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fc05c8d8841 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fc05c9002a5 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007fc05ec3b6db in start_thread (arg=0x7fc02e750700) at pthread_create.c:463
#8  0x00007fc060d1f71f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fc044d56700 (LWP 1409)):
#0  0x00007fc060d12cb9 in __GI___poll (fds=0x7fc03c004a00, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fc05c8d86e9 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fc05c8d87fc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc06165b87b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fc0616008da in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fc06141f23a in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fc063fc36f5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fc06142417d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fc05ec3b6db in start_thread (arg=0x7fc044d56700) at pthread_create.c:463
#9  0x00007fc060d1f71f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fc04d007700 (LWP 1399)):
#0  0x00007ffe8574599a in clock_gettime ()
#1  0x00007fc060d2ed36 in __GI___clock_gettime (clock_id=1, tp=0x7fc04d006ae0) at ../sysdeps/unix/clock_gettime.c:115
#2  0x00007fc06165b191 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007fc0616599c9 in QTimerInfoList::updateCurrentTime() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fc061659fa5 in QTimerInfoList::timerWait(timespec&) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fc06165b5ee in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fc05c8d7c48 in g_main_context_prepare () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007fc05c8d861b in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007fc05c8d87fc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007fc06165b87b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fc0616008da in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007fc06141f23a in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007fc062f65d45 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#13 0x00007fc06142417d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007fc05ec3b6db in start_thread (arg=0x7fc04d007700) at pthread_create.c:463
#15 0x00007fc060d1f71f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fc04fa9b700 (LWP 1380)):
#0  0x00007fc060d12cb9 in __GI___poll (fds=0x7fc04fa9aca8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fc06012b747 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fc06012d36a in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fc0526445e9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007fc06142417d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fc05ec3b6db in start_thread (arg=0x7fc04fa9b700) at pthread_create.c:463
#6  0x00007fc060d1f71f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fc0653820c0 (LWP 1377)):
#0  __lll_lock_wait_private () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007fc060c96245 in _int_free (have_lock=0, p=0x563ed0e3bf70, av=0x7fc060fe9c40 <main_arena>) at malloc.c:4296
#2  __GI___libc_free (mem=0x563ed0e3bf80) at malloc.c:3134
#3  0x00007fc04651e928 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i915_dri.so
#4  0x00007fc04651c77a in ?? () from /usr/lib/x86_64-linux-gnu/dri/i915_dri.so
#5  0x00007fc04651c973 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i915_dri.so
#6  0x00007fc04651bd5f in ?? () from /usr/lib/x86_64-linux-gnu/dri/i915_dri.so
#7  0x00007fc064447f88 in QSGBatchRenderer::Renderer::renderBatches() () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007fc06444d85e in QSGBatchRenderer::Renderer::render() () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9  0x00007fc06443e2a0 in QSGRenderer::renderScene(QSGBindable const&) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#10 0x00007fc06443e75b in QSGRenderer::renderScene(unsigned int) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007fc064478af0 in QSGDefaultRenderContext::renderNextFrame(QSGRenderer*, unsigned int) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#12 0x00007fc0644d6b68 in QQuickWindowPrivate::renderSceneGraph(QSize const&) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#13 0x00007fc06446aeb9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#14 0x00007fc0644e0726 in QQuickWindow::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#15 0x00007fc064f79323 in PlasmaQuick::Dialog::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libKF5PlasmaQuick.so.5
#16 0x0000563ecd49316f in ?? ()
#17 0x00007fc06261283c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#18 0x00007fc06261a104 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#19 0x00007fc0616028a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007fc061bd0201 in QWindowPrivate::deliverUpdateRequest() () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#21 0x00007fc061bd0719 in QWindow::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#22 0x00007fc0644e06c5 in QQuickWindow::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#23 0x00007fc064f79323 in PlasmaQuick::Dialog::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libKF5PlasmaQuick.so.5
#24 0x0000563ecd49316f in ?? ()
#25 0x00007fc06261283c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#26 0x00007fc06261a104 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#27 0x00007fc0616028a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x00007fc06165acfe in QTimerInfoList::activateTimers() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007fc06165b4f9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00007fc05c8d8537 in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#31 0x00007fc05c8d8770 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#32 0x00007fc05c8d87fc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#33 0x00007fc06165b85f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#34 0x00007fc0616008da in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#35 0x00007fc061609984 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#36 0x0000563ecd490881 in ?? ()
#37 0x00007fc060c1fbf7 in __libc_start_main (main=0x563ecd490460, argc=1, argv=0x7ffe8563e718, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe8563e708) at ../csu/libc-start.c:310
#38 0x0000563ecd49090a in _start ()

Possible duplicates by query: bug 440777.

Report to https://bugs.kde.org/
Comment 1 Nate Graham 2022-01-11 21:19:53 UTC 
This is a very old version and has not been supported for several years. Please upgrade. :) Kubuntu 20.04 is quite nice, and 22.04 is just around the corner.