Bug 375512

Summary: Plama crashes during "Do not allow this program to be grouped" animation
Product: [Plasma] plasmashell Reporter: Gist <axis>
Component: Task Manager and Icons-Only Task Manager widgetsAssignee: Eike Hein <hein>
Status: RESOLVED NOT A BUG    
Severity: crash CC: bshah, plasma-bugs-null
Priority: NOR Keywords: drkonqi
Version First Reported In: 5.5.5   
Target Milestone: 1.0   
Platform: openSUSE   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Gist 2017-01-24 17:37:20 UTC 
Application: plasmashell (5.5.5)

Qt Version: 5.5.1
Operating System: Linux 4.1.36-44-default x86_64
Distribution: "openSUSE Leap 42.1 (x86_64)"

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

After choosing the "Do not allow this program to be grouped"-option for a program there is one animation playing. The "task-icons" fade to the right until every single window is visible. Right clicking on that playing animation causes plasma to crash quite often. Sometimes it just stops for a short time but more than a third it crashes.

- Another bug that *might* be related:

Sometimes the animation hangs itself even though I didn't klick on the task-bar, leaving all the windows on the task bar unclickable. Both right and left mouse buttons doesn't have any effect in that case. Navigating with shortcuts like Alt+Tab still work as expected.


I'd love to be able to disable that animation, even though I don't know for sure whether that would fix the bug.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fbc61b207c0 (LWP 2075))]

Thread 9 (Thread 0x7fbb92bd7700 (LWP 3553)):
#0  0x00007fbc5b023bfd in poll () at /lib64/libc.so.6
#1  0x00007fbc57700e64 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fbc57700f7c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fbc5b950d8b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fbc5b8f7d53 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fbc5b71961a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007fbb94223cf7 in KCupsConnection::run() () at /usr/lib64/libkcupslib.so
#7  0x00007fbc5b71e32f in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007fbc5a82d0a4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fbc5b02c02d in clone () at /lib64/libc.so.6

Thread 8 (Thread 0x7fbba2bb2700 (LWP 2183)):
#0  0x00007fbc57742d17 in g_mutex_unlock () at /usr/lib64/libglib-2.0.so.0
#1  0x00007fbc577004a0 in g_main_context_prepare () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fbc57700d80 in  () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fbc57700f7c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#4  0x00007fbc5b950d8b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fbc5b8f7d53 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007fbc5b71961a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#7  0x00007fbc5f5c9282 in  () at /usr/lib64/libQt5Quick.so.5
#8  0x00007fbc5b71e32f in  () at /usr/lib64/libQt5Core.so.5
#9  0x00007fbc5a82d0a4 in start_thread () at /lib64/libpthread.so.0
#10 0x00007fbc5b02c02d in clone () at /lib64/libc.so.6

Thread 7 (Thread 0x7fbc298af700 (LWP 2169)):
#0  0x00007fbc5a83103f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fbc611fc86b in  () at /usr/lib64/libQt5Script.so.5
#2  0x00007fbc611fc899 in  () at /usr/lib64/libQt5Script.so.5
#3  0x00007fbc5a82d0a4 in start_thread () at /lib64/libpthread.so.0
#4  0x00007fbc5b02c02d in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7fbc2b1b4700 (LWP 2135)):
#0  0x00007fbc5b023bfd in poll () at /lib64/libc.so.6
#1  0x00007fbc57700e64 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fbc57700f7c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fbc5b950d8b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fbc5b8f7d53 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fbc5b71961a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007fbc5ea2de18 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007fbc5b71e32f in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007fbc5a82d0a4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fbc5b02c02d in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7fbc30a6f700 (LWP 2121)):
#0  0x00007fbc5b01fccd in read () at /lib64/libc.so.6
#1  0x00007fbc57741b60 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fbc57700999 in g_main_context_check () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fbc57700df8 in  () at /usr/lib64/libglib-2.0.so.0
#4  0x00007fbc57700f7c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#5  0x00007fbc5b950d8b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007fbc5b8f7d53 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#7  0x00007fbc5b71961a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#8  0x00007fbc5ea2de18 in  () at /usr/lib64/libQt5Qml.so.5
#9  0x00007fbc5b71e32f in  () at /usr/lib64/libQt5Core.so.5
#10 0x00007fbc5a82d0a4 in start_thread () at /lib64/libpthread.so.0
#11 0x00007fbc5b02c02d in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7fbc36b3d700 (LWP 2113)):
#0  0x00007fbc5a83103f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fbc4169da73 in  () at /usr/lib64/dri/radeonsi_dri.so
#2  0x00007fbc4169d1f7 in  () at /usr/lib64/dri/radeonsi_dri.so
#3  0x00007fbc5a82d0a4 in start_thread () at /lib64/libpthread.so.0
#4  0x00007fbc5b02c02d in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7fbc48909700 (LWP 2108)):
#0  0x00007fbc5b01fccd in read () at /lib64/libc.so.6
#1  0x00007fbc57741b60 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007fbc57700999 in g_main_context_check () at /usr/lib64/libglib-2.0.so.0
#3  0x00007fbc57700df8 in  () at /usr/lib64/libglib-2.0.so.0
#4  0x00007fbc57700f7c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#5  0x00007fbc5b950d8b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007fbc5b8f7d53 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#7  0x00007fbc5b71961a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#8  0x00007fbc5ea2de18 in  () at /usr/lib64/libQt5Qml.so.5
#9  0x00007fbc5b71e32f in  () at /usr/lib64/libQt5Core.so.5
#10 0x00007fbc5a82d0a4 in start_thread () at /lib64/libpthread.so.0
#11 0x00007fbc5b02c02d in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7fbc4b53b700 (LWP 2083)):
#0  0x00007fbc5b023bfd in poll () at /lib64/libc.so.6
#1  0x00007fbc5ff77422 in  () at /usr/lib64/libxcb.so.1
#2  0x00007fbc5ff7900f in xcb_wait_for_event () at /usr/lib64/libxcb.so.1
#3  0x00007fbc4d68c3c9 in  () at /usr/lib64/libQt5XcbQpa.so.5
#4  0x00007fbc5b71e32f in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007fbc5a82d0a4 in start_thread () at /lib64/libpthread.so.0
#6  0x00007fbc5b02c02d in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7fbc61b207c0 (LWP 2075)):
[KCrash Handler]
#6  0x00007fbc5cc9e150 in QWidget::windowHandle() const () at /usr/lib64/libQt5Widgets.so.5
#7  0x00007fbb9b047541 in  () at /usr/lib64/qt5/qml/org/kde/plasma/private/taskmanager/libtaskmanagerplugin.so
#8  0x00007fbc5b936c48 in  () at /usr/lib64/libQt5Core.so.5
#9  0x00007fbc5b92a8bc in QObject::event(QEvent*) () at /usr/lib64/libQt5Core.so.5
#10 0x00007fbc5cc74e7c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#11 0x00007fbc5cc79cc8 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#12 0x00007fbc5b8f9e95 in QCoreApplication::notifyInternal(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5
#13 0x00007fbc5b95077d in QTimerInfoList::activateTimers() () at /usr/lib64/libQt5Core.so.5
#14 0x00007fbc5b950aa1 in  () at /usr/lib64/libQt5Core.so.5
#15 0x00007fbc57700c84 in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0
#16 0x00007fbc57700ed8 in  () at /usr/lib64/libglib-2.0.so.0
#17 0x00007fbc57700f7c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#18 0x00007fbc5b950d6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#19 0x00007fbc5b8f7d53 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#20 0x00007fbc5b8ff8f6 in QCoreApplication::exec() () at /usr/lib64/libQt5Core.so.5
#21 0x0000000000436b3d in main ()

Reported using DrKonqi
Comment 1 David Edmundson 2017-01-24 20:52:05 UTC 
If you can easily reproduce this, can you also install debug symbols for plasma-workspace.
Comment 2 Eike Hein 2017-01-24 20:55:40 UTC 
I don't think it's worth pursuing this because the entire backend code was replaced and the animation is very very different now in terms of what model transaction happen.
Comment 3 Gist 2017-01-25 01:16:25 UTC 
(In reply to Eike Hein from comment #2)
> I don't think it's worth pursuing this because the entire backend code was
> replaced and the animation is very very different now in terms of what model
> transaction happen.

Thank you for the response. I'll try to upgrade soon.
It seems weird to me to label this report as invalid, but I definitely won't mess with your labels. :)
Comment 4 Eike Hein 2017-01-25 14:08:41 UTC 
^ It seemed weird to me too, but it's the best pick I could find. It's in valid in the sense that 5.5.x is EOL now and the code this bug applies to no longer exists in the now-supported versions.