Bug 419363

Application: plasmashell (5.18.3)

Qt Version: 5.12.4
Frameworks Version: 5.67.0
Operating System: Linux 5.3.0-43-generic x86_64
Windowing system: X11
Distribution: Ubuntu 19.10

-- Information about the crash:
- What I was doing when the application crashed:
Had a firefox window minimized, with a Pluma window open & active on the desktop. My panel is located at the bottom of the desktop. I went to minimize the Pluma window by clicking the application icon on the Panel & when I did, my index finger went all twitchy for a moment & I ended up quadruple clicking the application on the Panel (there might have been a fifth click) & when the spasm settled the left mouse button remained held down. When I released the mouse button, the desktop blanked, everything came back up slowly, and there was a Dr. Konki indicator in the lower right on the Task Manager stating that plasmashell had crashed.

I'm sure that the finger tapping resulted in mouse movement, it was just too rapid not to. I didn't notice the direction, but it was likely up or up & to the right. I think the cursor may have been just a little bit  above the task manager when plasmashell recovered from the crash. I'm in the habit of getting the cursor on the text for the application's window on the panel, so the middle of the application icon. The height of my Panel is 48 pixels.

The following widgets are always kept running on my system & this instance was no different: CPU Load Monitor, Memory Status & Psensor & Uptime Widget by clearmartin from the KDE Plasma Add-On Installer. The Uptime Widget hangs out in its own tiny panel near the top right of the screen & only shows up when I hover over it with my mouse. 

- Unusual behavior I noticed:
When the screen blanked & recovered, the Panel icons were in different orders than they had previously been in. Also NVIDIA X Server Settings indicates that there were 0 Recovered GPU Errors, though I've never actually seen that change, even when it would flip out after waking from sleep mode or just straight flashing spaztically on occasion.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fc58fb171c0 (LWP 1845))]

Thread 12 (Thread 0x7fc548ffc700 (LWP 5638)):
#0  0x00007fc5928f82c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55c392ac8a50) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fc5928f82c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55c392ac8a00, cond=0x55c392ac8a28) at pthread_cond_wait.c:508
#2  0x00007fc5928f82c6 in __pthread_cond_wait (cond=0x55c392ac8a28, mutex=0x55c392ac8a00) at pthread_cond_wait.c:638
#3  0x00007fc593458dbf in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fc593458eb1 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fc5950f47b9 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fc5950f4a1a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fc593452c92 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fc5928f1669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#9  0x00007fc5930d5323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7fc5497fd700 (LWP 3610)):
#0  0x00007fc5930c42ac in __GI___libc_read (nbytes=16, buf=0x7fc5497fccd0, fd=88) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007fc5930c42ac in __GI___libc_read (fd=88, buf=0x7fc5497fccd0, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:24
#2  0x00007fc591d7870f in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc591d305fe in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fc591d30a52 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fc591d30e33 in g_main_loop_run () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fc5723108da in  () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#7  0x00007fc591d5a181 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007fc5928f1669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#9  0x00007fc5930d5323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7fc54a1fe700 (LWP 3609)):
#0  0x00007fc5930c42ac in __GI___libc_read (nbytes=16, buf=0x7fc54a1fdce0, fd=70) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007fc5930c42ac in __GI___libc_read (fd=70, buf=0x7fc54a1fdce0, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:24
#2  0x00007fc591d7870f in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc591d305fe in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fc591d30a52 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fc591d30be3 in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fc591d30c31 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007fc591d5a181 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007fc5928f1669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#9  0x00007fc5930d5323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7fc54bfff700 (LWP 2455)):
#0  0x00007fc5928f82c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55c391c2ed34) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fc5928f82c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55c391c2ece0, cond=0x55c391c2ed08) at pthread_cond_wait.c:508
#2  0x00007fc5928f82c6 in __pthread_cond_wait (cond=0x55c391c2ed08, mutex=0x55c391c2ece0) at pthread_cond_wait.c:638
#3  0x00007fc593458dbf in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fc593458eb1 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fc5950f47b9 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fc5950f4a1a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fc593452c92 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fc5928f1669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#9  0x00007fc5930d5323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7fc564fcd700 (LWP 2359)):
#0  0x00007fc5928f82c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55c39471f430) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fc5928f82c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55c39471f3e0, cond=0x55c39471f408) at pthread_cond_wait.c:508
#2  0x00007fc5928f82c6 in __pthread_cond_wait (cond=0x55c39471f408, mutex=0x55c39471f3e0) at pthread_cond_wait.c:638
#3  0x00007fc593458dbf in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fc593458eb1 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fc5950f47b9 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fc5950f4a1a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fc593452c92 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fc5928f1669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#9  0x00007fc5930d5323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7fc566742700 (LWP 2304)):
#0  0x00007fc5928f82c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55c393ada2f4) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fc5928f82c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55c393ada2a0, cond=0x55c393ada2c8) at pthread_cond_wait.c:508
#2  0x00007fc5928f82c6 in __pthread_cond_wait (cond=0x55c393ada2c8, mutex=0x55c393ada2a0) at pthread_cond_wait.c:638
#3  0x00007fc593458dbf in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fc593458eb1 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fc5950f47b9 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fc5950f4a1a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fc593452c92 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fc5928f1669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#9  0x00007fc5930d5323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fc567384700 (LWP 2303)):
#0  0x00007fc5928f82c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55c3935e1570) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fc5928f82c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55c3935e1520, cond=0x55c3935e1548) at pthread_cond_wait.c:508
#2  0x00007fc5928f82c6 in __pthread_cond_wait (cond=0x55c3935e1548, mutex=0x55c3935e1520) at pthread_cond_wait.c:638
#3  0x00007fc593458dbf in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fc593458eb1 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fc5950f47b9 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fc5950f4a1a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fc593452c92 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fc5928f1669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#9  0x00007fc5930d5323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fc572fff700 (LWP 2068)):
#0  0x00007fc5930c42ac in __GI___libc_read (nbytes=16, buf=0x7fc572ffeb50, fd=42) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007fc5930c42ac in __GI___libc_read (fd=42, buf=0x7fc572ffeb50, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:24
#2  0x00007fc591d7870f in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc591d305fe in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fc591d30a52 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fc591d30be3 in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fc593671653 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fc5936185cb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fc593451a45 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fc59506c8aa in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#10 0x00007fc593452c92 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007fc5928f1669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#12 0x00007fc5930d5323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fc579f6b700 (LWP 2067)):
#0  0x00007fc5928f82c6 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55c391f41290) at ../sysdeps/unix/sysv/linux/futex-internal.h:80
#1  0x00007fc5928f82c6 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55c391f41240, cond=0x55c391f41268) at pthread_cond_wait.c:508
#2  0x00007fc5928f82c6 in __pthread_cond_wait (cond=0x55c391f41268, mutex=0x55c391f41240) at pthread_cond_wait.c:638
#3  0x00007fc593458dbf in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fc593458eb1 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fc5950f47b9 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fc5950f4a1a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fc593452c92 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fc5928f1669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#9  0x00007fc5930d5323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fc58c92b700 (LWP 2023)):
#0  0x00007fc5930c42ac in __GI___libc_read (nbytes=16, buf=0x7fc58c92ab70, fd=11) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007fc5930c42ac in __GI___libc_read (fd=11, buf=0x7fc58c92ab70, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:24
#2  0x00007fc591d7870f in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc591d305fe in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fc591d30a52 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fc591d30be3 in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fc593671653 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fc5936185cb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fc593451a45 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fc594d97319 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007fc593452c92 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007fc5928f1669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#12 0x00007fc5930d5323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fc58de52700 (LWP 1860)):
#0  0x00007fc5930c8c2f in __GI___poll (fds=0x7fc580016b20, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fc591d30aae in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fc591d30be3 in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc593671653 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fc5936185cb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fc593451a45 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fc59467cefa in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007fc593452c92 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fc5928f1669 in start_thread (arg=<optimized out>) at pthread_create.c:479
#9  0x00007fc5930d5323 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fc58fb171c0 (LWP 1845)):
[KCrash Handler]
#6  0x00007fc592e138d5 in KIO::DropJob::setApplicationActions(QList<QAction*> const&) () at /usr/lib/x86_64-linux-gnu/libKF5KIOWidgets.so.5
#7  0x00007fc58cbfef0c in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/plasma/scriptengines/plasma_appletscript_declarative.so
#8  0x00007fc58cc001c3 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/plasma/scriptengines/plasma_appletscript_declarative.so
#9  0x00007fc5936453f8 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fc591bec21b in KIO::TransferJob::mimetype(KIO::Job*, QString const&) () at /usr/lib/x86_64-linux-gnu/libKF5KIOCore.so.5
#11 0x00007fc591bec446 in KIO::TransferJob::slotMimetype(QString const&) () at /usr/lib/x86_64-linux-gnu/libKF5KIOCore.so.5
#12 0x00007fc593645558 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007fc591bb04a9 in KIO::SlaveInterface::mimeType(QString const&) () at /usr/lib/x86_64-linux-gnu/libKF5KIOCore.so.5
#14 0x00007fc591bb2d80 in KIO::SlaveInterface::dispatch(int, QByteArray const&) () at /usr/lib/x86_64-linux-gnu/libKF5KIOCore.so.5
#15 0x00007fc591bb062f in KIO::SlaveInterface::dispatch() () at /usr/lib/x86_64-linux-gnu/libKF5KIOCore.so.5
#16 0x00007fc591bb9832 in KIO::Slave::gotInput() () at /usr/lib/x86_64-linux-gnu/libKF5KIOCore.so.5
#17 0x00007fc593645558 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007fc593645e4a in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007fc594087a86 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#20 0x00007fc594090e00 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#21 0x00007fc593619a2a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007fc59361c6a8 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007fc593672037 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007fc591d308bd in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007fc591d30b40 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007fc591d30be3 in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007fc593671635 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x00007fc5936185cb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007fc593620336 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x000055c390c0db25 in  ()
#31 0x00007fc592fda1e3 in __libc_start_main (main=0x55c390c0cea0, argc=1, argv=0x7ffdb392fb48, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffdb392fb38) at ../csu/libc-start.c:308
#32 0x000055c390c0dcde in _start ()
[Inferior 1 (process 1845) detached]

The reporter indicates this bug may be a duplicate of or related to bug 356428.

Possible duplicates by query: bug 418320, bug 416030, bug 415067, bug 414323, bug 409466.

Reported using DrKonqi