[Bug 291670] New: Plasma keeps crashing, file:// protocol disappear?

Nicolas Bigaouette nbigaouette at gmail.com
Mon Jan 16 16:44:02 GMT 2012 

https://bugs.kde.org/show_bug.cgi?id=291670

           Summary: Plasma keeps crashing, file:// protocol disappear?
           Product: kde
           Version: 4.7
          Platform: Gentoo Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: crash
          Priority: NOR
         Component: general
        AssignedTo: unassigned-bugs at kde.org
        ReportedBy: nbigaouette at gmail.com


Version:           4.7 (using KDE 4.7.4) 
OS:                Linux

Many times a day, plasma crash. Seems to happen when opening Kate, but also
happen when kate is already open.

After the crash, I cannot browse files: opening Dolphin fails, and clicking the
"save as" or "open" button in already opened application results in the
following error prompt:
Could not start process Unable to create io-slave:
klauncher said: Unknown protocol 'file'.
.

After the crash, the only way to get back working desktop is to logout and log
back in.

The backtrace is:

Application: Plasma Desktop Shell (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f3abb4b0760 (LWP 30782))]

Thread 2 (Thread 0x7f3a93776700 (LWP 30797)):
#0  0x00007f3ab8ac2fb3 in poll () from /lib64/libc.so.6
#1  0x00007f3ab5cd0554 in g_main_context_iterate.clone.6 () from
/usr/lib64/libglib-2.0.so.0
#2  0x00007f3ab5cd09bf in g_main_context_iteration () from
/usr/lib64/libglib-2.0.so.0
#3  0x00007f3aba0f6c56 in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib64/qt4/libQtCore.so.4
#4  0x00007f3aba0cae12 in
QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib64/qt4/libQtCore.so.4
#5  0x00007f3aba0cb094 in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib64/qt4/libQtCore.so.4
#6  0x00007f3ab9fe0ee4 in QThread::exec() () from /usr/lib64/qt4/libQtCore.so.4
#7  0x00007f3aba0acaa0 in QInotifyFileSystemWatcherEngine::run() () from
/usr/lib64/qt4/libQtCore.so.4
#8  0x00007f3ab9fe3765 in QThreadPrivate::start(void*) () from
/usr/lib64/qt4/libQtCore.so.4
#9  0x00007f3aad86c2da in ?? () from /usr/lib64/opengl/nvidia/lib/libGL.so.1
#10 0x00007f3ab9d53dbc in start_thread () from /lib64/libpthread.so.0
#11 0x00007f3ab8acbded in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f3abb4b0760 (LWP 30782)):
[KCrash Handler]
#6  0x00007f3aba0536ec in QDataStream::operator>>(int&) () from
/usr/lib64/qt4/libQtCore.so.4
#7  0x00007f3aba59e965 in KServiceGroupFactory::KServiceGroupFactory() () from
/usr/lib64/libkdecore.so.5
#8  0x00007f3aba59ead3 in KServiceGroupFactory::self() () from
/usr/lib64/libkdecore.so.5
#9  0x00007f3aba599872 in KServiceGroup::root() () from
/usr/lib64/libkdecore.so.5
#10 0x00007f3aba599925 in KServiceGroup::group(QString const&) () from
/usr/lib64/libkdecore.so.5
#11 0x00007f3a9d821ec9 in Kickoff::ApplicationModelPrivate::fillNode(QString
const&, Kickoff::AppNode*) () from /usr/lib64/libkickoff.so
#12 0x00007f3a9d823a69 in Kickoff::ApplicationModel::reloadMenu() () from
/usr/lib64/libkickoff.so
#13 0x00007f3a9d823ba0 in
Kickoff::ApplicationModel::checkSycocaChange(QStringList const&) () from
/usr/lib64/libkickoff.so
#14 0x00007f3a9d823c19 in
Kickoff::ApplicationModel::qt_metacall(QMetaObject::Call, int, void**) () from
/usr/lib64/libkickoff.so
#15 0x00007f3aba0e049f in QMetaObject::activate(QObject*, QMetaObject const*,
int, void**) () from /usr/lib64/qt4/libQtCore.so.4
#16 0x00007f3aba6185c5 in KSycoca::databaseChanged(QStringList const&) () from
/usr/lib64/libkdecore.so.5
#17 0x00007f3aba619919 in KSycoca::qt_metacall(QMetaObject::Call, int, void**)
() from /usr/lib64/libkdecore.so.5
#18 0x00007f3ab6eb0552 in QDBusConnectionPrivate::deliverCall(QObject*, int,
QDBusMessage const&, QList<int> const&, int) () from
/usr/lib64/qt4/libQtDBus.so.4
#19 0x00007f3ab6eba3bf in QDBusCallDeliveryEvent::placeMetaCall(QObject*) ()
from /usr/lib64/qt4/libQtDBus.so.4
#20 0x00007f3aba0dff62 in QObject::event(QEvent*) () from
/usr/lib64/qt4/libQtCore.so.4
#21 0x00007f3ab9259b3c in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() from /usr/lib64/qt4/libQtGui.so.4
#22 0x00007f3ab925e69a in QApplication::notify(QObject*, QEvent*) () from
/usr/lib64/qt4/libQtGui.so.4
#23 0x00007f3abae948e8 in KApplication::notify(QObject*, QEvent*) () from
/usr/lib64/libkdeui.so.5
#24 0x00007f3aba0cbacb in QCoreApplication::notifyInternal(QObject*, QEvent*)
() from /usr/lib64/qt4/libQtCore.so.4
#25 0x00007f3aba0cf2e4 in QCoreApplicationPrivate::sendPostedEvents(QObject*,
int, QThreadData*) () from /usr/lib64/qt4/libQtCore.so.4
#26 0x00007f3aba0f6ab3 in postEventSourceDispatch(_GSource*, int (*)(void*),
void*) () from /usr/lib64/qt4/libQtCore.so.4
#27 0x00007f3ab5cd001a in g_main_context_dispatch () from
/usr/lib64/libglib-2.0.so.0
#28 0x00007f3ab5cd0828 in g_main_context_iterate.clone.6 () from
/usr/lib64/libglib-2.0.so.0
#29 0x00007f3ab5cd09bf in g_main_context_iteration () from
/usr/lib64/libglib-2.0.so.0
#30 0x00007f3aba0f6c1a in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib64/qt4/libQtCore.so.4
#31 0x00007f3ab92fff86 in
QGuiEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
() from /usr/lib64/qt4/libQtGui.so.4
#32 0x00007f3aba0cae12 in
QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib64/qt4/libQtCore.so.4
#33 0x00007f3aba0cb094 in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib64/qt4/libQtCore.so.4
#34 0x00007f3aba0cf57b in QCoreApplication::exec() () from
/usr/lib64/qt4/libQtCore.so.4
#35 0x00007f3aa9230403 in kdemain () from
/usr/lib64/libkdeinit4_plasma-desktop.so
#36 0x0000000000407566 in launch(int, char const*, char const*, char const*,
int, char const*, bool, char const*, bool, char const*) ()
#37 0x0000000000408120 in handle_launcher_request ()
#38 0x0000000000408845 in handle_requests(int) ()
#39 0x0000000000409491 in main ()


Reproducible: Sometimes

Steps to Reproduce:
Open kate and select a session from the popup (before kate starts)

Actual Results:  
Plasma crash, desktop becomes unusable.

Expected Results:  
Working desktop. At least being able to continue to work without having to
logout/login.

Running 4.7.4 on Gentoo x86_64 (amd64).

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