i'm running the taskbar from 4.3 branch now, let's see if i can reproduce the crashes
On 8/8/09, David Faure <fa...@kde.org> wrote: > On Friday 07 August 2009, Marco Martin wrote: >> On Friday 07 August 2009, David Faure wrote: >> > Plasma crashes rather often for me. >> > I finally got a bt of the crash. Is this enough info for anyone to fix >> > it? > > And now I got another backtrace, no null pointer this time > (am I the only one opening and closing windows in kde 4.3???). > I wonder if the auto-restarting of plasma makes most people ignore such > crashes, or if I activated an option (e.g. task grouping) that most people > didn't. > > #0 0x00007f21de30b2de in QGraphicsItem::parentItem (this=0x4197120) at > graphicsview/qgraphicsitem.cpp:938 > #1 0x00007f21de3542e0 in QGraphicsLayoutPrivate::addChildLayoutItem > (this=0x2c46340, layoutItem=0x4190620) at > graphicsview/qgraphicslayout_p.cpp:162 > #2 0x00007f21de37367b in QGraphicsGridLayout::addItem (this=0x2c462e0, > item=0x4190620, row=0, column=0, rowSpan=1, columnSpan=1, alignment={i = > -362538464}) at graphicsview/qgraphicsgridlayout.cpp:158 > #3 0x00007f21c58cd8c4 in TaskItemLayout::layoutItems (this=0x2c462e0) at > /d/kde/src/4/kdebase/workspace/plasma/applets/tasks/taskitemlayout.cpp:370 > #4 0x00007f21c58d8ea5 in TaskGroupItem::constraintsChanged (this=0x2c45110, > constraints={i = -362538176}) at > /d/kde/src/4/kdebase/workspace/plasma/applets/tasks/taskgroupitem.cpp:726 > #5 0x00007f21c58dbf4c in TaskGroupItem::qt_metacall (this=0x2c45110, > _c=QMetaObject::InvokeMetaMethod, _id=11, _a=0x7fffea641cb0) at > /d/kde/build/4/kdebase/workspace/plasma/applets/tasks/taskgroupitem.moc:110 > #6 0x00007f21dd5a2614 in QMetaObject::activate (sender=0x27b4890, > from_signal_index=36, to_signal_index=36, argv=0x7fffea641cb0) at > kernel/qobject.cpp:3109 > #7 0x00007f21dd5a3a11 in QMetaObject::activate (sender=0x27b4890, > m=0x7f21c5ae7f60, local_signal_index=0, argv=0x7fffea641cb0) at > kernel/qobject.cpp:3186 > #8 0x00007f21c58c7599 in Tasks::constraintsChanged (this=0x27b4890, _t1={i > = -362537728}) at > /d/kde/build/4/kdebase/workspace/plasma/applets/tasks/tasks.moc:95 > #9 0x00007f21c58c8ee3 in Tasks::constraintsEvent (this=0x27b4890, > constraints={i = -362537344}) at > /d/kde/src/4/kdebase/workspace/plasma/applets/tasks/tasks.cpp:169 > #10 0x00007f21e1bb4433 in Plasma::Applet::flushPendingConstraintsEvents > (this=0x27b4890) at /d/kde/src/4/kdelibs/plasma/applet.cpp:1163 > #11 0x00007f21e1bb458b in Plasma::Applet::timerEvent (this=0x27b4890, > event=0x7fffea642860) at /d/kde/src/4/kdelibs/plasma/applet.cpp:2110 > > (gdb) p *this > $3 = {_vptr.QGraphicsItem = 0x30a2340, d_ptr = 0x1} > Ouch. Probably already deleted. > > (gdb) up > #1 0x00007f21de3542e0 in QGraphicsLayoutPrivate::addChildLayoutItem > (this=0x2c46340, layoutItem=0x4190620) at > graphicsview/qgraphicslayout_p.cpp:162 > (gdb) p item > $9 = (class QGraphicsItem *) 0x4197120 > > Comes from "if (QGraphicsItem *item = layoutItem->graphicsItem()) {" > > (gdb) p layoutItem > $11 = (class QGraphicsLayoutItem *) 0x4190620 > (gdb) p *layoutItem.d_ptr > warning: can't find linker symbol for virtual table for > `QGraphicsLayoutItemPrivate' value > $8 = {_vptr.QGraphicsLayoutItemPrivate = 0x7f21dca5db40, sizePolicy = {data > = 3701857088}, parent = 0x2c462e0, userSizeHints = {{wd = > 3.3979969529082241e-316, ht = -1}, {wd = 0, ht = 0}, {wd = > 1.8733483140837378e-316, ht = 0}, {wd = 0, ht = 0}}, cachedSizeHints = {{wd > = 0, ht = 4.9406564584124654e-324}, {wd = 0, ht = 0}, {wd = 0, ht = 0}, {wd > = 4.9406564584124654e-324, ht = 6.9062189363508992e-310}}, cachedConstraint > = {wd = 6.9062189363508992e-310, ht = -1}, sizeHintCacheDirty = 0, isLayout > = 0, ownedByLayout = 0, q_ptr = 0x6, geom = {xp = 6.7903865310888714e-313, > yp = 4.9406564584124654e-324, w = 0, h = 0}, graphicsItem = 0x4197120} > > The value of q_ptr in there indicates that layoutItem, too, is already > deleted. > > But the value of layoutItem comes from m_itemPositions in > TaskItemLayout::layoutItems, > dunno where to go from there. But obviously that list contains dangling > pointers. > I could run plasma in valgrind all day, but, hmm. Not on the laptop ;) > > Qt-4.5.2 > > -- > David Faure, fa...@kde.org, sponsored by Qt Software @ Nokia to work on KDE, > Konqueror (http://www.konqueror.org), and KOffice (http://www.koffice.org). > _______________________________________________ Plasma-devel mailing list Plasma-devel@kde.org https://mail.kde.org/mailman/listinfo/plasma-devel