Bug 362713

Summary:	Crash when right-clicking on a taskmanager entry that disappeared after the click
Product:	[Plasma] plasmashell	Reporter:	Raman Gupta <rocketraman>
Component:	Task Manager and Icons-Only Task Manager	Assignee:	Eike Hein <hein>
Status:	RESOLVED FIXED
Severity:	crash	CC:	bvbfan, cfeck, notmart, plasma-bugs, tom-kde.bugs
Priority:	NOR
Version:	5.6.2
Target Milestone:	1.0
Platform:	Fedora RPMs
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:
Attachments:	plasmashell kcrash output Plasmashell kcrash output (v5.6.2)

Description Raman Gupta 2016-05-05 18:49:25 UTC

- What I was doing when the application crashed:

I had right-clicked on a taskbar entry for a Skype phone call. The Skype call had disconnected just before my right-click, and therefore the taskbar entry was about to disappear. When the taskbar entry disappeared, Plasma crashed.

Application: plasmashell (5.5.5)

Qt Version: 5.6.0
Operating System: Linux 4.4.7-300.fc23.x86_64 x86_64
Distribution: "Fedora release 23 (Twenty Three)"


Reproducible: Always

Steps to Reproduce:
1. Call on Skype
2. Call the Skype Call Testing Service
3. Hangup
4. Before the Skype Phone taskmanager entry disappears, right-click on it
5. Wait for the crash

Comment 1 Raman Gupta 2016-05-05 18:50:03 UTC

Created attachment 98790 [details]
plasmashell kcrash output

Comment 2 Marco Martin 2016-05-06 09:05:10 UTC

pasting inline
Thread 1 (Thread 0x7fd2e762e940 (LWP 3119)):
[KCrash Handler]
#5  0x00007fd2fa8f7204 in QQuickItem::window() const () at /lib64/libQt5Quick.so.5
#6  0x00007fd22d42df0e in QtPrivate::QFunctorSlotObject<Backend::itemContextMenu(QQuickItem*, QObject*)::{lambda()#1}, 0, QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*) () at /usr/lib64/qt5/qml/org/kde/plasma/private/taskmanager/libtaskmanagerplugin.so
#7  0x00007fd2f6cf4656 in QSingleShotTimer::timerEvent(QTimerEvent*) () at /lib64/libQt5Core.so.5
#8  0x00007fd2f6ce8e93 in QObject::event(QEvent*) () at /lib64/libQt5Core.so.5
#9  0x00007fd2f788dc0c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#10 0x00007fd2f7892e96 in QApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#11 0x00007fd2f6cbb968 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#12 0x00007fd2f6d0fbde in QTimerInfoList::activateTimers() () at /lib64/libQt5Core.so.5
#13 0x00007fd2f6d10111 in timerSourceDispatch(_GSource*, int (*)(void*), void*) () at /lib64/libQt5Core.so.5
#14 0x00007fd2f199de3a in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#15 0x00007fd2f199e1d0 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#16 0x00007fd2f199e27c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#17 0x00007fd2f6d10cef in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#18 0x00007fd2f6cb96ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#19 0x00007fd2f6cc1ddc in QCoreApplication::exec() () at /lib64/libQt5Core.so.5
#20 0x00005620a5a8e08a in main ()

Comment 3 Eike Hein 2016-05-09 05:54:58 UTC

Please check with 5.6.x.

Comment 4 Raman Gupta 2016-05-09 17:12:55 UTC

(In reply to Eike Hein from comment #3)
> Please check with 5.6.x.

Yes, I reproduced the issue with 5.6.2 (Fedora 23 stable repo).

Here is the crashed thread, I will also attach the complete crash backtrace:

Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fcf6c8ac940 (LWP 3120))]

Thread 1 (Thread 0x7fcf6c8ac940 (LWP 3120)):
[KCrash Handler]
#5  0x00007fcf7c48fc60 in QWindow::isTopLevel() const () at /lib64/libQt5Gui.so.5
#6  0x00007fcf7c493db5 in QWindow::setTransientParent(QWindow*) () at /lib64/libQt5Gui.so.5
#7  0x00007fceb1596033 in QtPrivate::QFunctorSlotObject<Backend::itemContextMenu(QQuickItem*, QObject*)::{lambda()#1}, 0, QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*) () at /usr/lib64/qt5/qml/org/kde/plasma/private/taskmanager/libtaskmanagerplugin.so
#8  0x00007fcf7c176656 in QSingleShotTimer::timerEvent(QTimerEvent*) () at /lib64/libQt5Core.so.5
#9  0x00007fcf7c16ae93 in QObject::event(QEvent*) () at /lib64/libQt5Core.so.5
#10 0x00007fcf7cafbc0c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#11 0x00007fcf7cb00e96 in QApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#12 0x00007fcf7c13d968 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#13 0x00007fcf7c191bde in QTimerInfoList::activateTimers() () at /lib64/libQt5Core.so.5
#14 0x00007fcf7c192111 in timerSourceDispatch(_GSource*, int (*)(void*), void*) () at /lib64/libQt5Core.so.5
#15 0x00007fcf76c1ce3a in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#16 0x00007fcf76c1d1d0 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#17 0x00007fcf76c1d27c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#18 0x00007fcf7c192cef in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#19 0x00007fcf7c13b6ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#20 0x00007fcf7c143ddc in QCoreApplication::exec() () at /lib64/libQt5Core.so.5
#21 0x000056473d40b216 in main ()

Comment 5 Raman Gupta 2016-05-09 17:14:37 UTC

Created attachment 98859 [details]
Plasmashell kcrash output (v5.6.2)

Comment 6 Anthony Fieroni 2016-05-28 12:09:13 UTC

Can you check this patch -> https://git.reviewboard.kde.org/r/128030/

Comment 7 Anthony Fieroni 2016-05-28 18:48:29 UTC

Git commit 62b272fc7837f92ad3b0d05d65c033ec27a175dc by Anthony Fieroni.
Committed on 28/05/2016 at 18:48.
Pushed by anthonyfieroni into branch 'Plasma/5.6'.

[taskmanager plugin] Dismiss context menu when associated window is closed

REVIEW: 128030

Signed-off-by: Anthony Fieroni <bvbfan@abv.bg>

M  +13   -6    applets/taskmanager/plugin/backend.cpp

http://commits.kde.org/plasma-desktop/62b272fc7837f92ad3b0d05d65c033ec27a175dc

Comment 8 Christoph Feck 2016-06-13 17:18:54 UTC

Anthony, does above commit resolve this bug? Can you confirm bug 363644 is a duplicate?

Comment 9 Anthony Fieroni 2016-06-14 06:25:56 UTC

*** Bug 363644 has been marked as a duplicate of this bug. ***

Comment 10 Anthony Fieroni 2016-06-14 06:27:02 UTC

Fixed in 5.6.5