Bug 380443

Summary: Lazarus trunk crashes taskbar
Product: [Plasma] plasmashell Reporter: john4deidre2013
Component: Task Manager and Icons-Only Task Manager widgetsAssignee: Eike Hein <hein>
Status: RESOLVED DUPLICATE    
Severity: crash CC: bshah, plasma-bugs-null
Priority: NOR Keywords: drkonqi
Version First Reported In: 5.9.5   
Target Milestone: 1.0   
Platform: openSUSE   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description john4deidre2013 2017-06-02 00:52:02 UTC 
Application: plasmashell (5.9.5)

Qt Version: 5.7.1
Frameworks Version: 5.33.0
Operating System: Linux 4.11.2-1-default x86_64
Distribution: "openSUSE Tumbleweed"

-- Information about the crash:
just tried to close the program down and it crashed

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 0x7f1dc250bd40 (LWP 1964))]

Thread 9 (Thread 0x7f1ceb662700 (LWP 2063)):
#0  0x00007f1db68d5b24 in g_mutex_unlock () at /usr/lib64/libglib-2.0.so.0
#1  0x00007f1db6890228 in g_main_context_prepare () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f1db6890c0b in  () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f1db6890dec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#4  0x00007f1dbc454afb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f1dbc3fbd5a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007f1dbc21eafa in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#7  0x00007f1cedf3bfa7 in KCupsConnection::run() () at /usr/lib64/libkcupslib.so
#8  0x00007f1dbc2237cc in  () at /usr/lib64/libQt5Core.so.5
#9  0x00007f1dbb3da4e7 in start_thread () at /lib64/libpthread.so.0
#10 0x00007f1dbbb28a2f in clone () at /lib64/libc.so.6

Thread 8 (Thread 0x7f1d000a2700 (LWP 2055)):
#0  0x00007f1dbbb1f08d in poll () at /lib64/libc.so.6
#1  0x00007f1db6890cd9 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f1db6890dec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f1dbc454afb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007f1dbc3fbd5a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f1dbc21eafa in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007f1dbfee8e76 in  () at /usr/lib64/libQt5Quick.so.5
#7  0x00007f1dbc2237cc in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007f1dbb3da4e7 in start_thread () at /lib64/libpthread.so.0
#9  0x00007f1dbbb28a2f in clone () at /lib64/libc.so.6

Thread 7 (Thread 0x7f1d09922700 (LWP 2054)):
#0  0x00007f1dbb3e05ed in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f1d9621123b in  () at /usr/lib64/dri/r600_dri.so
#2  0x00007f1d96210f77 in  () at /usr/lib64/dri/r600_dri.so
#3  0x00007f1dbb3da4e7 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f1dbbb28a2f in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7f1d0a26a700 (LWP 2053)):
#0  0x00007f1dbb3e05ed in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f1d9621123b in  () at /usr/lib64/dri/r600_dri.so
#2  0x00007f1d96210f77 in  () at /usr/lib64/dri/r600_dri.so
#3  0x00007f1dbb3da4e7 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f1dbbb28a2f in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7f1d9cbda700 (LWP 2052)):
#0  0x00007f1dbb3e05ed in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f1dc1bc4de4 in  () at /usr/lib64/libQt5Script.so.5
#2  0x00007f1dc1bc4e29 in  () at /usr/lib64/libQt5Script.so.5
#3  0x00007f1dbb3da4e7 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f1dbbb28a2f in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7f1d9ebb2700 (LWP 2051)):
#0  0x00007f1dbbb1f08d in poll () at /lib64/libc.so.6
#1  0x00007f1db6890cd9 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f1db6890dec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f1dbc454afb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007f1dbc3fbd5a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f1dbc21eafa in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007f1dbf34d165 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007f1dbc2237cc in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007f1dbb3da4e7 in start_thread () at /lib64/libpthread.so.0
#9  0x00007f1dbbb28a2f in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7f1d9ffff700 (LWP 2042)):
#0  0x00007f1db68d5b24 in g_mutex_unlock () at /usr/lib64/libglib-2.0.so.0
#1  0x00007f1db6890228 in g_main_context_prepare () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f1db6890c0b in  () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f1db6890dec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#4  0x00007f1dbc454afb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f1dbc3fbd5a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007f1dbc21eafa in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#7  0x00007f1dbf34d165 in  () at /usr/lib64/libQt5Qml.so.5
#8  0x00007f1dbc2237cc in  () at /usr/lib64/libQt5Core.so.5
#9  0x00007f1dbb3da4e7 in start_thread () at /lib64/libpthread.so.0
#10 0x00007f1dbbb28a2f in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f1db0862700 (LWP 1976)):
#0  0x00007f1dbbb1f08d in poll () at /lib64/libc.so.6
#1  0x00007f1db6890cd9 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f1db6890dec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f1dbc454afb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007f1dbc3fbd5a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f1dbc21eafa in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007f1dbc86ce05 in  () at /usr/lib64/libQt5DBus.so.5
#7  0x00007f1dbc2237cc in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007f1dbb3da4e7 in start_thread () at /lib64/libpthread.so.0
#9  0x00007f1dbbb28a2f in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f1dc250bd40 (LWP 1964)):
[KCrash Handler]
#6  0x00007f1dbc3c0aa9 in  () at /usr/lib64/libQt5Core.so.5
#7  0x00007f1dbc3c0e1c in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007f1dbc3c7969 in  () at /usr/lib64/libQt5Core.so.5
#9  0x00007f1dbc42b2a3 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#10 0x00007f1dbc4a54e4 in QAbstractItemModel::rowsRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib64/libQt5Core.so.5
#11 0x00007f1dbc39fafb in QAbstractItemModel::endRemoveRows() () at /usr/lib64/libQt5Core.so.5
#12 0x00007f1cf69fc9a6 in TaskManager::TaskGroupingProxyModel::Private::sourceRowsAboutToBeRemoved(QModelIndex const&, int, int) () at /usr/lib64/libtaskmanager.so.6
#13 0x00007f1cf69ff739 in  () at /usr/lib64/libtaskmanager.so.6
#14 0x00007f1dbc42b2a3 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#15 0x00007f1dbc4a5474 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib64/libQt5Core.so.5
#16 0x00007f1dbc39f3db in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib64/libQt5Core.so.5
#17 0x00007f1dbc3c51fd in  () at /usr/lib64/libQt5Core.so.5
#18 0x00007f1dbc3c5393 in  () at /usr/lib64/libQt5Core.so.5
#19 0x00007f1dbc3c7948 in  () at /usr/lib64/libQt5Core.so.5
#20 0x00007f1dbc42b2a3 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#21 0x00007f1dbc4a5474 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib64/libQt5Core.so.5
#22 0x00007f1dbc39f3db in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib64/libQt5Core.so.5
#23 0x00007f1cfdf2669f in  () at /usr/lib64/libKF5ItemModels.so.5
#24 0x00007f1cfdf27051 in  () at /usr/lib64/libKF5ItemModels.so.5
#25 0x00007f1dbc42b2a3 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#26 0x00007f1dbc4a5474 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib64/libQt5Core.so.5
#27 0x00007f1dbc39f3db in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib64/libQt5Core.so.5
#28 0x00007f1dbc3bbf51 in  () at /usr/lib64/libQt5Core.so.5
#29 0x00007f1dbc42b2a3 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#30 0x00007f1dbc4a5474 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib64/libQt5Core.so.5
#31 0x00007f1dbc39f3db in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib64/libQt5Core.so.5
#32 0x00007f1cf6a16f6e in TaskManager::XWindowTasksModel::Private::removeWindow(unsigned long long) () at /usr/lib64/libtaskmanager.so.6
#33 0x00007f1dbc42b3b7 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#34 0x00007f1dbee69e12 in KWindowSystem::windowRemoved(unsigned long long) () at /usr/lib64/libKF5WindowSystem.so.5
#35 0x00007f1da496d8e9 in  () at /usr/lib64/qt5/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#36 0x00007f1dbee6264c in NETRootInfo::update(QFlags<NET::Property>, QFlags<NET::Property2>) () at /usr/lib64/libKF5WindowSystem.so.5
#37 0x00007f1dbee63382 in NETRootInfo::event(xcb_generic_event_t*, QFlags<NET::Property>*, QFlags<NET::Property2>*) () at /usr/lib64/libKF5WindowSystem.so.5
#38 0x00007f1dbee636e5 in NETRootInfo::event(xcb_generic_event_t*, unsigned long*, int) () at /usr/lib64/libKF5WindowSystem.so.5
#39 0x00007f1da496d02d in  () at /usr/lib64/qt5/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#40 0x00007f1dbc3fae7f in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () at /usr/lib64/libQt5Core.so.5
#41 0x00007f1daa219de0 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /usr/lib64/libQt5XcbQpa.so.5
#42 0x00007f1daa21aa72 in QXcbConnection::processXcbEvents() () at /usr/lib64/libQt5XcbQpa.so.5
#43 0x00007f1dbc42bf42 in QObject::event(QEvent*) () at /usr/lib64/libQt5Core.so.5
#44 0x00007f1dbd39c8ac in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#45 0x00007f1dbd3a3f84 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#46 0x00007f1dbc3fdb68 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5
#47 0x00007f1dbc3ffd2d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib64/libQt5Core.so.5
#48 0x00007f1dbc4546c3 in  () at /usr/lib64/libQt5Core.so.5
#49 0x00007f1db6890b27 in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0
#50 0x00007f1db6890d58 in  () at /usr/lib64/libglib-2.0.so.0
#51 0x00007f1db6890dec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#52 0x00007f1dbc454adf in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#53 0x00007f1dbc3fbd5a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#54 0x00007f1dbc40432c in QCoreApplication::exec() () at /usr/lib64/libQt5Core.so.5
#55 0x00005648c18d7ae2 in  ()
#56 0x00007f1dbba5b46a in __libc_start_main () at /lib64/libc.so.6
#57 0x00005648c18d7e5a in _start ()

Reported using DrKonqi
Comment 1 Eike Hein 2017-06-07 08:46:42 UTC 
What is "Lazarus trunk"?
Comment 2 Christoph Feck 2017-06-07 15:04:14 UTC 
https://en.wikipedia.org/wiki/Lazarus_(IDE)

It uses multiple windows, so on closing it, we get the well-known taskmanager crash.

*** This bug has been marked as a duplicate of bug 342763 ***