[kde] [Bug 376451] New: Adding Widget to the Task Manager crash

Alexander Izmailov bugzilla_noreply at kde.org
Mon Feb 13 17:03:31 GMT 2017 

https://bugs.kde.org/show_bug.cgi?id=376451

            Bug ID: 376451
           Summary: Adding Widget to the Task Manager crash
           Product: kde
           Version: unspecified
          Platform: unspecified
                OS: FreeBSD
            Status: UNCONFIRMED
          Keywords: drkonqi
          Severity: crash
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: yarolig at gmail.com
  Target Milestone: ---

Application: plasma-desktop (4.11.21)
KDE Platform Version: 4.14.10
Qt Version: 4.8.7
Operating System: FreeBSD 11.0-RELEASE-p1 amd64
Distribution (Platform): FreeBSD Ports

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

Clicked on the panel -> Panel options -> Add Widgets...
Found "Pager" and tried to move it to panel the following way.
Hold left mouse button and move cursor near Konqueror and Dolphin launchers to
find a good place.
When I move cursor over Task Manager the panel disappears and crashes. 

I tried other widgets. They crash when moving over Task Manager too.

Stderr messages may be useful:
file:///usr/local/share/apps/plasma/packages/org.kde.desktop.widgetexplorer/contents/ui/Tooltip.qml:75:5:
QML Grid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/local/share/apps/plasma/packages/org.kde.desktop.widgetexplorer/contents/ui/Tooltip.qml:75:5:
QML Grid: Cannot specify anchors for items inside Grid
file:///usr/local/lib/kde4/imports/org/kde/plasma/components/Button.qml:194:5:
QML Row: Possible anchor loop detected on fill.
file:///usr/local/lib/kde4/imports/org/kde/plasma/components/Button.qml:194:5:
QML Row: Possible anchor loop detected on fill.
file:///usr/local/share/apps/plasma/packages/org.kde.desktop.widgetexplorer/contents/ui/main.qml:137:5:
QML QDeclarativeLoader_QML_196: Binding loop detected for property "height"
QDeclarativeExpression: Expression "(function $separator() { return
modelData.separator })" depends on non-NOTIFYable properties: 
    Plasma::WidgetAction::separator
file:///usr/local/share/apps/plasma/packages/org.kde.desktop.widgetexplorer/contents/ui/main.qml:73:8:
QML Component: Delegate component must be Item type.
QDeclarativeExpression: Expression "(function $separator() { return
modelData.separator })" depends on non-NOTIFYable properties: 
    Plasma::WidgetAction::separator
QDeclarativeExpression: Expression "(function $separator() { return
modelData.separator })" depends on non-NOTIFYable properties: 
    Plasma::WidgetAction::separator
file:///usr/local/share/apps/plasma/packages/org.kde.desktop.widgetexplorer/contents/ui/main.qml:48:8:
QML Component: Delegate component must be Item type.
file:///usr/local/share/apps/plasma/packages/org.kde.desktop.widgetexplorer/contents/ui/main.qml:316:17:
Unable to assign undefined value
file:///usr/local/share/apps/plasma/packages/org.kde.desktop.widgetexplorer/contents/ui/main.qml:71:
Unable to assign QObject* to QDeclarativeItem*
file:///usr/local/share/apps/plasma/packages/org.kde.desktop.widgetexplorer/contents/ui/main.qml:46:
Unable to assign QObject* to QDeclarativeItem*
ControllerWindow::resizeEvent QSize(1280, 100) 
plasma-desktop(16587)/kdecore (KConfigSkeleton)
KCoreConfigSkeleton::writeConfig:
KCrash: Attempting to start /usr/local/bin/plasma-desktop from kdeinit

The crash can be reproduced sometimes.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 7 (Thread 809016000 (LWP 100692/kdeinit4))]

Thread 7 (Thread 809016000 (LWP 100692/kdeinit4)):
[KCrash Handler]
#8  0x000000082e3974aa in qt_plugin_instance () from
/usr/local/lib/kde4/imports/org/kde/draganddrop/libdraganddropplugin.so
#9  0x000000082e396fbd in qt_plugin_instance () from
/usr/local/lib/kde4/imports/org/kde/draganddrop/libdraganddropplugin.so
#10 0x000000082e3971bd in qt_plugin_instance () from
/usr/local/lib/kde4/imports/org/kde/draganddrop/libdraganddropplugin.so
#11 0x0000000802dd4687 in QGraphicsItem::sceneEvent () from
/usr/local/lib/qt4/libQtGui.so.4
#12 0x0000000810f53616 in QDeclarativeItem::sceneEvent () from
/usr/local/lib/qt4/libQtDeclarative.so.4
#13 0x0000000802df508d in QGraphicsScene::items () from
/usr/local/lib/qt4/libQtGui.so.4
#14 0x0000000802e01333 in QGraphicsScene::dragLeaveEvent () from
/usr/local/lib/qt4/libQtGui.so.4
#15 0x0000000802dfc9f4 in QGraphicsScene::event () from
/usr/local/lib/qt4/libQtGui.so.4
#16 0x000000080280ac0c in QApplicationPrivate::notify_helper () from
/usr/local/lib/qt4/libQtGui.so.4
#17 0x000000080280d231 in QApplication::notify () from
/usr/local/lib/qt4/libQtGui.so.4
#18 0x0000000800c729b7 in KApplication::notify () from
/usr/local/lib/libkdeui.so.5
#19 0x000000080218d0c6 in QCoreApplication::notifyInternal () from
/usr/local/lib/qt4/libQtCore.so.4
#20 0x0000000802e1fe12 in QGraphicsView::dragLeaveEvent () from
/usr/local/lib/qt4/libQtGui.so.4
#21 0x0000000802859afa in QWidget::event () from
/usr/local/lib/qt4/libQtGui.so.4
#22 0x0000000802c0555e in QFrame::event () from
/usr/local/lib/qt4/libQtGui.so.4
#23 0x0000000802c84368 in QAbstractScrollArea::viewportEvent () from
/usr/local/lib/qt4/libQtGui.so.4
#24 0x0000000802e1f8c6 in QGraphicsView::viewportEvent () from
/usr/local/lib/qt4/libQtGui.so.4
#25 0x0000000802c84be4 in QAbstractScrollArea::qt_metacall () from
/usr/local/lib/qt4/libQtGui.so.4
#26 0x000000080218d3cc in
QCoreApplicationPrivate::sendThroughObjectEventFilters () from
/usr/local/lib/qt4/libQtCore.so.4
#27 0x000000080280abfc in QApplicationPrivate::notify_helper () from
/usr/local/lib/qt4/libQtGui.so.4
#28 0x000000080280d0a1 in QApplication::notify () from
/usr/local/lib/qt4/libQtGui.so.4
#29 0x0000000800c729b7 in KApplication::notify () from
/usr/local/lib/libkdeui.so.5
#30 0x000000080218d0c6 in QCoreApplication::notifyInternal () from
/usr/local/lib/qt4/libQtCore.so.4
#31 0x00000008028916ab in QCursor::setPos () from
/usr/local/lib/qt4/libQtGui.so.4
#32 0x000000080289315f in QCursor::setPos () from
/usr/local/lib/qt4/libQtGui.so.4
#33 0x0000000802892f2c in QCursor::setPos () from
/usr/local/lib/qt4/libQtGui.so.4
#34 0x000000080281938b in QDrag::~QDrag () from
/usr/local/lib/qt4/libQtGui.so.4
#35 0x00000008028193cf in QDrag::~QDrag () from
/usr/local/lib/qt4/libQtGui.so.4
#36 0x00000008021a0230 in QObjectPrivate::deleteChildren () from
/usr/local/lib/qt4/libQtCore.so.4
#37 0x000000080284b64d in QWidget::~QWidget () from
/usr/local/lib/qt4/libQtGui.so.4
#38 0x000000080284bd0f in QWidget::~QWidget () from
/usr/local/lib/qt4/libQtGui.so.4
#39 0x00000008021a0230 in QObjectPrivate::deleteChildren () from
/usr/local/lib/qt4/libQtCore.so.4
#40 0x000000080284b64d in QWidget::~QWidget () from
/usr/local/lib/qt4/libQtGui.so.4
#41 0x0000000802e1b3cf in QGraphicsView::~QGraphicsView () from
/usr/local/lib/qt4/libQtGui.so.4
#42 0x000000081849f8b1 in ?? () from
/usr/local/lib/libkdeinit4_plasma-desktop.so
#43 0x000000081849f95f in ?? () from
/usr/local/lib/libkdeinit4_plasma-desktop.so
#44 0x00000008021a0be4 in QObject::event () from
/usr/local/lib/qt4/libQtCore.so.4
#45 0x000000080285a20f in QWidget::event () from
/usr/local/lib/qt4/libQtGui.so.4
#46 0x000000080280ac0c in QApplicationPrivate::notify_helper () from
/usr/local/lib/qt4/libQtGui.so.4
#47 0x000000080280d231 in QApplication::notify () from
/usr/local/lib/qt4/libQtGui.so.4
#48 0x0000000800c729b7 in KApplication::notify () from
/usr/local/lib/libkdeui.so.5
#49 0x000000080218d0c6 in QCoreApplication::notifyInternal () from
/usr/local/lib/qt4/libQtCore.so.4
#50 0x000000080218dc37 in QCoreApplicationPrivate::sendPostedEvents () from
/usr/local/lib/qt4/libQtCore.so.4
#51 0x00000008021ba228 in QEventDispatcherGlib::QEventDispatcherGlib () from
/usr/local/lib/qt4/libQtCore.so.4
#52 0x00000008077f9b75 in g_main_context_dispatch () from
/usr/local/lib/libglib-2.0.so.0
#53 0x00000008077f9ea4 in g_main_context_pending () from
/usr/local/lib/libglib-2.0.so.0
#54 0x00000008077f9f34 in g_main_context_iteration () from
/usr/local/lib/libglib-2.0.so.0
#55 0x00000008021b9dde in QEventDispatcherGlib::processEvents () from
/usr/local/lib/qt4/libQtCore.so.4
#56 0x00000008028abc4d in QX11Info::isCompositingManagerRunning () from
/usr/local/lib/qt4/libQtGui.so.4
#57 0x000000080218a6b2 in QEventLoop::exec () from
/usr/local/lib/qt4/libQtCore.so.4
#58 0x0000000802894295 in QCursor::setPos () from
/usr/local/lib/qt4/libQtGui.so.4
#59 0x000000080281965e in QDrag::exec () from /usr/local/lib/qt4/libQtGui.so.4
#60 0x000000082e396ca2 in qt_plugin_instance () from
/usr/local/lib/kde4/imports/org/kde/draganddrop/libdraganddropplugin.so
#61 0x000000082e396df8 in qt_plugin_instance () from
/usr/local/lib/kde4/imports/org/kde/draganddrop/libdraganddropplugin.so
#62 0x0000000802df4ff1 in QGraphicsScene::items () from
/usr/local/lib/qt4/libQtGui.so.4
#63 0x0000000802df69c6 in QGraphicsScene::items () from
/usr/local/lib/qt4/libQtGui.so.4
#64 0x0000000802e01bc6 in QGraphicsScene::mouseMoveEvent () from
/usr/local/lib/qt4/libQtGui.so.4
#65 0x0000000802dfca69 in QGraphicsScene::event () from
/usr/local/lib/qt4/libQtGui.so.4
#66 0x000000080280ac0c in QApplicationPrivate::notify_helper () from
/usr/local/lib/qt4/libQtGui.so.4
#67 0x000000080280d231 in QApplication::notify () from
/usr/local/lib/qt4/libQtGui.so.4
#68 0x0000000800c729b7 in KApplication::notify () from
/usr/local/lib/libkdeui.so.5
#69 0x000000080218d0c6 in QCoreApplication::notifyInternal () from
/usr/local/lib/qt4/libQtCore.so.4
#70 0x000000080280e05d in QApplicationPrivate::currentPlatform () from
/usr/local/lib/qt4/libQtGui.so.4
#71 0x0000000802e1874d in QGraphicsViewPrivate::mouseMoveEventHandler () from
/usr/local/lib/qt4/libQtGui.so.4
#72 0x0000000802e209c0 in QGraphicsView::mouseMoveEvent () from
/usr/local/lib/qt4/libQtGui.so.4
#73 0x000000080285987a in QWidget::event () from
/usr/local/lib/qt4/libQtGui.so.4
#74 0x0000000802c0555e in QFrame::event () from
/usr/local/lib/qt4/libQtGui.so.4
#75 0x0000000802c84368 in QAbstractScrollArea::viewportEvent () from
/usr/local/lib/qt4/libQtGui.so.4
#76 0x0000000802e1f8c6 in QGraphicsView::viewportEvent () from
/usr/local/lib/qt4/libQtGui.so.4
#77 0x0000000802c84be4 in QAbstractScrollArea::qt_metacall () from
/usr/local/lib/qt4/libQtGui.so.4
#78 0x000000080218d3cc in
QCoreApplicationPrivate::sendThroughObjectEventFilters () from
/usr/local/lib/qt4/libQtCore.so.4
#79 0x000000080280abfc in QApplicationPrivate::notify_helper () from
/usr/local/lib/qt4/libQtGui.so.4
#80 0x000000080280c58c in QApplication::notify () from
/usr/local/lib/qt4/libQtGui.so.4
#81 0x0000000800c729b7 in KApplication::notify () from
/usr/local/lib/libkdeui.so.5
#82 0x000000080218d0c6 in QCoreApplication::notifyInternal () from
/usr/local/lib/qt4/libQtCore.so.4
#83 0x000000080280b657 in QApplicationPrivate::sendMouseEvent () from
/usr/local/lib/qt4/libQtGui.so.4
#84 0x0000000802882505 in qt_try_modal () from /usr/local/lib/qt4/libQtGui.so.4
#85 0x0000000802880c4b in QApplication::x11ProcessEvent () from
/usr/local/lib/qt4/libQtGui.so.4
#86 0x00000008028abf9c in QX11Info::isCompositingManagerRunning () from
/usr/local/lib/qt4/libQtGui.so.4
#87 0x00000008077f9b75 in g_main_context_dispatch () from
/usr/local/lib/libglib-2.0.so.0
#88 0x00000008077f9ea4 in g_main_context_pending () from
/usr/local/lib/libglib-2.0.so.0
#89 0x00000008077f9f34 in g_main_context_iteration () from
/usr/local/lib/libglib-2.0.so.0
#90 0x00000008021b9dde in QEventDispatcherGlib::processEvents () from
/usr/local/lib/qt4/libQtCore.so.4
#91 0x00000008028abc4d in QX11Info::isCompositingManagerRunning () from
/usr/local/lib/qt4/libQtGui.so.4
#92 0x000000080218a6b2 in QEventLoop::exec () from
/usr/local/lib/qt4/libQtCore.so.4
#93 0x000000080218d66d in QCoreApplication::exec () from
/usr/local/lib/qt4/libQtCore.so.4
#94 0x00000008184b4086 in kdemain () from
/usr/local/lib/libkdeinit4_plasma-desktop.so
#95 0x000000000040a138 in ?? ()
#96 0x000000000040af03 in ?? ()
#97 0x0000000000408540 in ?? ()
#98 0x0000000000407561 in ?? ()
#99 0x0000000000404d1f in ?? ()
#100 0x0000000800631000 in ?? ()
#101 0x0000000000000000 in ?? ()

Thread 6 (Thread 809131200 (LWP 100979/kdeinit4)):
#0  0x000000080423998a in _kevent () from /lib/libc.so.7
#1  0x0000000803edcb82 in pthread_suspend_all_np () from /lib/libthr.so.3
#2  0x000000080216e5a8 in QProcessEnvironment::systemEnvironment () from
/usr/local/lib/qt4/libQtCore.so.4
#3  0x000000080208ad9c in QThreadStorageData::finish () from
/usr/local/lib/qt4/libQtCore.so.4
#4  0x0000000803ed9b55 in pthread_create () from /lib/libthr.so.3
#5  0x0000000000000000 in ?? ()

Thread 5 (Thread 81b1d1400 (LWP 100981/kdeinit4)):
#0  0x0000000803ee767c in pthread_cleanup_pop () from /lib/libthr.so.3
#1  0x0000000803ee5510 in _pthread_cond_wait () from /lib/libthr.so.3
#2  0x0000000810728bc2 in ?? () from /usr/local/lib/qt4/libQtScript.so.4
#3  0x0000000810728b39 in ?? () from /usr/local/lib/qt4/libQtScript.so.4
#4  0x0000000803ed9b55 in pthread_create () from /lib/libthr.so.3
#5  0x0000000000000000 in ?? ()

Thread 4 (Thread 825a37600 (LWP 101070/kdeinit4)):
#0  0x0000000803ee767c in pthread_cleanup_pop () from /lib/libthr.so.3
#1  0x0000000803ee5510 in _pthread_cond_wait () from /lib/libthr.so.3
#2  0x000000080208c1eb in QWaitCondition::wait () from
/usr/local/lib/qt4/libQtCore.so.4
#3  0x000000080208c037 in QWaitCondition::wait () from
/usr/local/lib/qt4/libQtCore.so.4
#4  0x00000008116060aa in ThreadWeaver::Weaver::qt_metacall () from
/usr/local/lib/libthreadweaver.so.4
#5  0x0000000811608d43 in ThreadWeaver::State::weaver () from
/usr/local/lib/libthreadweaver.so.4
#6  0x000000081160731f in ThreadWeaver::Thread::run () from
/usr/local/lib/libthreadweaver.so.4
#7  0x000000080208ad9c in QThreadStorageData::finish () from
/usr/local/lib/qt4/libQtCore.so.4
#8  0x0000000803ed9b55 in pthread_create () from /lib/libthr.so.3
#9  0x0000000000000000 in ?? ()

Thread 3 (Thread 825a37b00 (LWP 101071/kdeinit4)):
#0  0x0000000803ee767c in pthread_cleanup_pop () from /lib/libthr.so.3
#1  0x0000000803ee5510 in _pthread_cond_wait () from /lib/libthr.so.3
#2  0x000000080208c1eb in QWaitCondition::wait () from
/usr/local/lib/qt4/libQtCore.so.4
#3  0x000000080208c037 in QWaitCondition::wait () from
/usr/local/lib/qt4/libQtCore.so.4
#4  0x00000008116060aa in ThreadWeaver::Weaver::qt_metacall () from
/usr/local/lib/libthreadweaver.so.4
#5  0x0000000811608d43 in ThreadWeaver::State::weaver () from
/usr/local/lib/libthreadweaver.so.4
#6  0x0000000811608d5c in ThreadWeaver::State::weaver () from
/usr/local/lib/libthreadweaver.so.4
#7  0x0000000811608d5c in ThreadWeaver::State::weaver () from
/usr/local/lib/libthreadweaver.so.4
#8  0x000000081160731f in ThreadWeaver::Thread::run () from
/usr/local/lib/libthreadweaver.so.4
#9  0x000000080208ad9c in QThreadStorageData::finish () from
/usr/local/lib/qt4/libQtCore.so.4
#10 0x0000000803ed9b55 in pthread_create () from /lib/libthr.so.3
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 82b284e00 (LWP 101072/kdeinit4)):
#0  0x0000000803ee767c in pthread_cleanup_pop () from /lib/libthr.so.3
#1  0x0000000803ee5510 in _pthread_cond_wait () from /lib/libthr.so.3
#2  0x000000080208c1eb in QWaitCondition::wait () from
/usr/local/lib/qt4/libQtCore.so.4
#3  0x000000080208c037 in QWaitCondition::wait () from
/usr/local/lib/qt4/libQtCore.so.4
#4  0x00000008116060aa in ThreadWeaver::Weaver::qt_metacall () from
/usr/local/lib/libthreadweaver.so.4
#5  0x0000000811608d43 in ThreadWeaver::State::weaver () from
/usr/local/lib/libthreadweaver.so.4
#6  0x0000000811608d5c in ThreadWeaver::State::weaver () from
/usr/local/lib/libthreadweaver.so.4
#7  0x0000000811608d5c in ThreadWeaver::State::weaver () from
/usr/local/lib/libthreadweaver.so.4
#8  0x000000081160731f in ThreadWeaver::Thread::run () from
/usr/local/lib/libthreadweaver.so.4
#9  0x000000080208ad9c in QThreadStorageData::finish () from
/usr/local/lib/qt4/libQtCore.so.4
#10 0x0000000803ed9b55 in pthread_create () from /lib/libthr.so.3
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 82b39e800 (LWP 101073/kdeinit4)):
#0  0x0000000803ee767c in pthread_cleanup_pop () from /lib/libthr.so.3
#1  0x0000000803ee5510 in _pthread_cond_wait () from /lib/libthr.so.3
#2  0x000000080208c1eb in QWaitCondition::wait () from
/usr/local/lib/qt4/libQtCore.so.4
#3  0x000000080208c037 in QWaitCondition::wait () from
/usr/local/lib/qt4/libQtCore.so.4
#4  0x00000008116060aa in ThreadWeaver::Weaver::qt_metacall () from
/usr/local/lib/libthreadweaver.so.4
#5  0x0000000811608d43 in ThreadWeaver::State::weaver () from
/usr/local/lib/libthreadweaver.so.4
#6  0x000000081160731f in ThreadWeaver::Thread::run () from
/usr/local/lib/libthreadweaver.so.4
#7  0x000000080208ad9c in QThreadStorageData::finish () from
/usr/local/lib/qt4/libQtCore.so.4
#8  0x0000000803ed9b55 in pthread_create () from /lib/libthr.so.3
#9  0x0000000000000000 in ?? ()

Reported using DrKonqi

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