Re: device notifier plasmoid crash (backtrace)

["Alexis Ménard" <darktears31@xxxxxxxxx>]

Fixed in trunk and backported in 4.0 branch...enjoy!!

On Jan 14, 2008 2:03 PM, Alexis Ménard <darktears31@xxxxxxxxx> wrote:

Ok i have the same problem...

I will work on it....

On 1/14/08, Raul Fernandes <rgfbr@xxxxxxxxxxxx> wrote:
> I have compiled the KDE 4.0.0 from the sources. While
> using it, I've found a bug in device notifier
> plasmoid.
>
> Steps to reproduce:
>
> 1 - plug a pendrive
> 2 - wait the system notify the new device
> 3 - open the plasmoid (add widgets->device notifier)
>
> There are another bug here as in plasmoid the device
> is not listed
>
> 4 - remove the pendrive
> 5 - and crash happens
>
> I have reproduced it several times and all backtraces
> are the same.
>
> Here is the backtrace:
>
> Using host libthread_db library
> "/lib/libthread_db.so.1".
> [Thread debugging using libthread_db enabled]
> [New Thread 0xb56e2b40 (LWP 3269)]
> [New Thread 0xb3cd9bb0 (LWP 3270)]
> [KCrash handler]
> #6  0xb7f1b6a1 in
> Plasma::LayoutItem::unsetManagingLayout
> (this=0xbff93ff8,
>     layout=0x84d1e70)
>     at
> /tmp/kdebase-workspace-4.0.0/libs/plasma/layouts/layoutitem.cpp:132
> #7  0xb7f0e96c in Plasma::BoxLayout::removeItem
> (this=0x84d1e70,
>     item=0xbff93ff8)
>     at
> /tmp/kdebase-workspace-4.0.0/libs/plasma/layouts/boxlayout.cpp:329
> #8  0xb34bcdbd in
> DeviceNotifier::performSourceRemovedInDesktop (
>     this=0x84c0eb8, name=@0x82959e8)
>     at
> /tmp/kdebase-workspace-4.0.0/plasma/applets/devicenotifier/devicenotifier.cpp:356
> #9  0xb34bce1f in DeviceNotifier::onSourceRemoved
> (this=0x84c0eb8,
>     name=@0x82959e8)
>     at
> /tmp/kdebase-workspace-4.0.0/plasma/applets/devicenotifier/devicenotifier.cpp:339
> #10 0xb34bd808 in DeviceNotifier::qt_metacall
> (this=0x84c0eb8,
>     _c=QMetaObject::InvokeMetaMethod, _id=1,
> _a=0xbff9450c)
>     at
> /tmp/kdebase-workspace-4.0.0/build/plasma/applets/devicenotifier/devicenotifier.moc:80
> #11 0xb720f4f2 in QMetaObject::activate
> (sender=0x81afb28,
>     from_signal_index=5, to_signal_index=5,
> argv=0xbff9450c)
>     at kernel/qobject.cpp:3087
> #12 0xb720f78d in QMetaObject::activate
> (sender=0x81afb28, m=0xb7fab134,
>     local_signal_index=1, argv=0xbff9450c) at
> kernel/qobject.cpp:3149
> #13 0xb7f071a0 in Plasma::DataEngine::sourceRemoved
> (this=0x81afb28,
>     _t1=@0x82959e8)
>     at
> /tmp/kdebase-workspace-4.0.0/build/libs/plasma/dataengine.moc:169
> #14 0xb7f0753f in Plasma::DataEngine::removeSource
> (this=0x81afb28,
>     source=@0x8481008)
>     at
> /tmp/kdebase-workspace-4.0.0/libs/plasma/dataengine.cpp:391
> #15 0xb34946dc in HotplugEngine::onDeviceRemoved
> (this=0x81afb28,
>     udi=@0x8481008)
>     at
> /tmp/kdebase-workspace-4.0.0/plasma/dataengines/hotplug/hotplugengine.cpp:96
> #16 0xb349579f in HotplugEngine::qt_metacall
> (this=0x81afb28,
>     _c=QMetaObject::InvokeMetaMethod, _id=1,
> _a=0xbff94abc)
>     at
> /tmp/kdebase-workspace-4.0.0/build/plasma/dataengines/hotplug/hotplugengine.moc:69
> #17 0xb720f4f2 in QMetaObject::activate
> (sender=0x81b0790,
>     from_signal_index=5, to_signal_index=5,
> argv=0xbff94abc)
>     at kernel/qobject.cpp:3087
> #18 0xb720f78d in QMetaObject::activate
> (sender=0x81b0790, m=0xb731a3ac,
>     local_signal_index=1, argv=0xbff94abc) at
> kernel/qobject.cpp:3149
> #19 0xb72cd6d4 in Solid::DeviceNotifier::deviceRemoved
> (this=0x81b0790,
>     _t1=@0x8481008)
>     at
> /tmp/kdelibs-4.0.0/build/solid/solid/devicenotifier.moc:85
> #20 0xb72ce0d9 in
> Solid::DeviceManagerPrivate::_k_deviceRemoved (
>     this=0x81b0790, udi=@0x8481008)
>     at
> /tmp/kdelibs-4.0.0/solid/solid/devicemanager.cpp:185
> #21 0xb72ce84d in
> Solid::DeviceManagerPrivate::qt_metacall
> (this=0x81b0790,
>     _c=QMetaObject::InvokeMetaMethod, _id=1,
> _a=0xbff9501c)
>     at
> /tmp/kdelibs-4.0.0/build/solid/solid/devicemanager_p.moc:72
> #22 0xb720f4f2 in QMetaObject::activate
> (sender=0x81a7680,
>     from_signal_index=5, to_signal_index=5,
> argv=0xbff9501c)
>     at kernel/qobject.cpp:3087
> #23 0xb720f78d in QMetaObject::activate
> (sender=0x81a7680, m=0xb731a52c,
>     local_signal_index=1, argv=0xbff9501c) at
> kernel/qobject.cpp:3149
> #24 0xb72e30ee in
> Solid::Ifaces::DeviceManager::deviceRemoved
> (this=0x81a7680,
>     _t1=@0x8481008)
>     at
> /tmp/kdelibs-4.0.0/build/solid/solid/ifaces/devicemanager.moc:85
> #25 0xb72f35b4 in
> Solid::Backends::Hal::HalManager::slotDeviceRemoved (
>     this=0x81a7680, udi=@0x8481008)
>     at
> /tmp/kdelibs-4.0.0/solid/solid/backends/hal/halmanager.cpp:220
> #26 0xb72f3689 in
> Solid::Backends::Hal::HalManager::qt_metacall (
>     this=0x81a7680, _c=QMetaObject::InvokeMetaMethod,
> _id=1, _a=0xbff950b0)
>     at
> /tmp/kdelibs-4.0.0/build/solid/solid/backends/hal/halmanager.moc:70
> #27 0xb70c26c8 in QDBusConnectionPrivate::deliverCall
> (this=0x81ad8d0,
>     object=0x81a7680, msg=@0x84746d0,
> metaTypes=@0x84746d4, slotIdx=7)
>     at qdbusintegrator.cpp:837
> #28 0xb70cab90 in
> QDBusCallDeliveryEvent::placeMetaCall (this=0x84746a0,
>
>     object=0x81a7680) at qdbusintegrator_p.h:128
> #29 0xb7212171 in QObject::event (this=0x81a7680,
> e=0x84746a0)
>     at kernel/qobject.cpp:1128
> #30 0xb69dd001 in QApplicationPrivate::notify_helper
> (this=0x8088710,
>     receiver=0x81a7680, e=0x84746a0) at
> kernel/qapplication.cpp:3556
> #31 0xb69dd311 in QApplication::notify
> (this=0x806f970, receiver=0x81a7680,
>     e=0x84746a0) at kernel/qapplication.cpp:3115
> #32 0xb78f3232 in KApplication::notify
> (this=0x806f970, receiver=0x81a7680,
>     event=0x84746a0) at
> /tmp/kdelibs-4.0.0/kdeui/kernel/kapplication.cpp:314
> #33 0xb71fc364 in QCoreApplication::notifyInternal
> (this=0x806f970,
>     receiver=0x81a7680, event=0x84746a0) at
> kernel/qcoreapplication.cpp:530
> #34 0xb7200293 in QCoreApplication::sendEvent
> (receiver=0x81a7680,
>     event=0x84746a0)
>     at
> ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:200
> #35 0xb71ffddf in
> QCoreApplicationPrivate::sendPostedEvents
> (receiver=0x0,
>     event_type=0, data="" at
> kernel/qcoreapplication.cpp:1113
> #36 0xb71fff35 in QCoreApplication::sendPostedEvents
> (receiver=0x0,
>     event_type=-1) at kernel/qcoreapplication.cpp:1001
> #37 0xb7227678 in postEventSourceDispatch
> (s=0x808c2b8)
>     at kernel/qeventdispatcher_glib.cpp:207
> #38 0xb623426c in IA__g_main_context_dispatch
> (context=0x808b698)
>     at gmain.c:1916
> #39 0xb62376fb in g_main_context_iterate
> (context=0x808b698, block=1,
>     dispatch=1, self=0x80887d8) at gmain.c:2547
> #40 0xb6237bd7 in IA__g_main_context_iteration
> (context=0x808b698, may_block=1)
>     at gmain.c:2606
> #41 0xb722757c in QEventDispatcherGlib::processEvents
> (this=0x8088e70,
>     flags=@0xbff95938) at
> kernel/qeventdispatcher_glib.cpp:338
> #42 0xb6a72bb2 in
> QGuiEventDispatcherGlib::processEvents
> (this=0x8088e70,
>     flags=@0xbff9596c) at
> kernel/qguieventdispatcher_glib.cpp:191
> #43 0xb71fb234 in QEventLoop::processEvents
> (this=0xbff959e0,
>     flags=@0xbff959a4) at kernel/qeventloop.cpp:140
> #44 0xb71fb498 in QEventLoop::exec (this=0xbff959e0,
> flags=@0xbff959e8)
>     at kernel/qeventloop.cpp:182
> #45 0xb7200053 in QCoreApplication::exec () at
> kernel/qcoreapplication.cpp:759
> #46 0xb69dc417 in QApplication::exec () at
> kernel/qapplication.cpp:3053
> #47 0xb7fc5561 in kdemain (argc=1, argv=0xbff95b64)
>     at
> /tmp/kdebase-workspace-4.0.0/plasma/plasma/main.cpp:54
> #48 0x0804888c in main (argc=1, argv=0xbff95b64)
>     at
> /tmp/kdebase-workspace-4.0.0/build/plasma/plasma/plasma-qgv_dummy.cpp:3
> #0  0xb7fd0410 in __kernel_vsyscall ()
>
> I think here are 2 bugs. The first is device is not
> listed in plasmoid if I open the plasmoid after plug
> it. If I open the plasmoid and plug the pendrive, it
> works fine.
>
> The second is when the device is removed, the plasmoid
> tries to remove a device not listed and crashes.
>
> I use KDE 4.0.0, Qt 4.3.3 (qt-copy version) and
> linuxfromscratch 6.2, all compiled from the sources.
>
> I can send the coredump file if need it.
>
> Should I add this bug to bugs.kde.org??
>
>
> Raul Fernandes
> rgfbr@xxxxxxxxxxxx
>
>
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