crash in tasks applet

[Marco Martin]

On Wednesday 29 October 2008, Bart Cerneels wrote:
> Hi all,
>
> I've been getting consistent crashes for the past week. Still
> happends with revision 877334. So I hope this helps you to fix it.
>
> Tips to reproduce:
> * enable only show minimized windows.
> * unminimized a window by clicking on it in the task panel.
> I'm also using a vertically oriented panel, which might be a case not
> tested by the people working on the tasks applet.

ouch looks like a slot called on a deleted object by the tooltip manager.
that's really weird, because the widget is unregistered upon abstracttaskitem 
deletion...

> Here is the backtrace:
>
> plasma(17074) TaskManager::GroupManager::remove: remove:  "Gmail -
> Inbox - bart.cerneels at gmail.com - Mozilla Firefox"
>
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread 0xb53336c0 (LWP 17074)]
> 0xb665f7a3 in QMetaObject::invokeMethod (obj=0x83fd238,
>    member=0xb7f24094 "toolTipAboutToShow", type=Qt::AutoConnection, ret=
>        {<QGenericArgument> = {_data = 0x0, _name = 0x0}, <No data
> fields>}, val0=
>      {_data = 0x0, _name = 0x0}, val1={_data = 0x0, _name = 0x0},
> val2=
>      {_data = 0x0, _name = 0x0}, val3={_data = 0x0, _name = 0x0},
> val4=
>      {_data = 0x0, _name = 0x0}, val5={_data = 0x0, _name = 0x0},
> val6=
>      {_data = 0x0, _name = 0x0}, val7={_data = 0x0, _name = 0x0},
> val8=
>      {_data = 0x0, _name = 0x0}, val9={_data = 0x0, _name = 0x0})
>    at
> /home/bart/Code/KDE/trunk/KDE/qt-copy/src/corelib/kernel/qmetaobject.cpp:95
>1 951         int idx =
> obj->metaObject()->indexOfMethod(sig.constData());
> (gdb) bt
> #0  0xb665f7a3 in QMetaObject::invokeMethod (obj=0x83fd238,
>    member=0xb7f24094 "toolTipAboutToShow", type=Qt::AutoConnection,
> ret=
>        {<QGenericArgument> = {_data = 0x0, _name = 0x0}, <No data
> fields>}, val0=
>      {_data = 0x0, _name = 0x0}, val1={_data = 0x0, _name = 0x0}, val2=
>      {_data = 0x0, _name = 0x0}, val3={_data = 0x0, _name = 0x0}, val4=
>      {_data = 0x0, _name = 0x0}, val5={_data = 0x0, _name = 0x0}, val6=
>      {_data = 0x0, _name = 0x0}, val7={_data = 0x0, _name = 0x0}, val8=
>      {_data = 0x0, _name = 0x0}, val9={_data = 0x0, _name = 0x0})
>    at
> /home/bart/Code/KDE/trunk/KDE/qt-copy/src/corelib/kernel/qmetaobject.cpp:95
>1 #1  0xb7e8b1ac in Plasma::ToolTipManagerPrivate::showToolTip
> (this=0x817dd00) at /opt/qt-copy/include/QtCore/qobjectdefs.h:388
> #2  0xb7e8b444 in Plasma::ToolTipManager::qt_metacall (this=0x81e9a18,
>    _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0xbfe55f98)
>    at
> /home/bart/Code/KDE/trunk/build/KDE/kdebase/workspace/libs/plasma/tooltipma
>nager.moc:70 #3  0xb666c0a9 in QMetaObject::activate (sender=0x817dd40,
> from_signal_index=4, to_signal_index=4, argv=0x0)
>    at
> /home/bart/Code/KDE/trunk/KDE/qt-copy/src/corelib/kernel/qobject.cpp:3007
> #4  0xb666c772 in QMetaObject::activate (sender=0x817dd40, m=0xb674cc44,
> local_signal_index=0, argv=0x0)
>    at
> /home/bart/Code/KDE/trunk/KDE/qt-copy/src/corelib/kernel/qobject.cpp:3077
> #5  0xb66a9997 in QTimer::timeout (this=0x817dd40)
>    at .moc/release-shared/moc_qtimer.cpp:126
> #6  0xb667322e in QTimer::timerEvent (this=0x817dd40, e=0xbfe56468)
>    at
> /home/bart/Code/KDE/trunk/KDE/qt-copy/src/corelib/kernel/qtimer.cpp:263 #7 
> 0xb6666baa in QObject::event (this=0x817dd40, e=0xbfe56468)
>    at
> /home/bart/Code/KDE/trunk/KDE/qt-copy/src/corelib/kernel/qobject.cpp:1096
> #8  0xb6af286c in QApplicationPrivate::notify_helper (this=0x80804f8,
> receiver=0x817dd40, e=0xbfe56468)
>    at
> /home/bart/Code/KDE/trunk/KDE/qt-copy/src/gui/kernel/qapplication.cpp:3800
> #9  0xb6af4909 in QApplication::notify (this=0x8062dd0, receiver=0x817dd40,
> e=0xbfe56468)
> _______________________________________________
> Plasma-devel mailing list
> Plasma-devel at kde.org
> https://mail.kde.org/mailman/listinfo/plasma-devel