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