Version: 1.1 (KDE SC 4.5) (using Devel) OS: Linux We received a report about a crash at https://launchpad.net/bugs/604597 Unfortunately, the reporter's explanation about the circumstances were very sparse, but fortunately the backtrace is quite informative about the crash: #0 0x011bb949 in QFont (this=0xbf5e8058) at text/qfont.cpp:766 No locals. #1 0x012a697e in QStyleOption (this=0xbf5e8100, version=1, type=983041) at styles/qstyleoption.cpp:163 No locals. #2 0x012a89c0 in QStyleOptionComplex (this=0xbf5e8100, version=1, type=983041) at styles/qstyleoption.cpp:2786 No locals. #3 0x012a9872 in QStyleOptionSlider (this=0xbf5e8100) at styles/qstyleoption.cpp:2878 No locals. #4 0x014356a0 in QScrollBar::sizeHint (this=0x8e33358) at widgets/qscrollbar.cpp:491 opt = {<QStyleOptionComplex> = {<QStyleOption> = {version = 1, type = 983041, state = {i = 0}, direction = Qt::LeftToRight, rect = { x1 = 0, y1 = 0, x2 = -1, y2 = -1}, fontMetrics = {d = { d = 0x1000000}}, palette = {static staticMetaObject = {d = { superdata = 0x0, stringdata = 0x1724680 "QPalette", data = 0x17247c0, extradata = 0x0}}, d = 0x1, current_group = 0, resolve_mask = 0}}, subControls = {i = 0}, activeSubControls = { i = 0}}, orientation = 0, minimum = 0, maximum = 0, tickPosition = QSlider::NoTicks, tickInterval = 0, upsideDown = false, sliderPosition = 23242253, sliderValue = 0, singleStep = 0, pageStep = 0, notchTarget = 0, dialWrapping = false} scrollBarExtent = 0 scrollBarSliderMin = <value optimized out> size = {wd = 0, ht = 0} #5 0x01472929 in QAbstractScrollArea::maximumViewportSize (this=0x8e32538) at widgets/qabstractscrollarea.cpp:586 d = (const QAbstractScrollAreaPrivate * const) 0x8e32570 hsbExt = 148867096 f = 148873512 max = {wd = -1084325192, ht = 23026580} #6 0x016592ec in QGraphicsViewPrivate::recalculateContentSize ( this=0x8e32570) at graphicsview/qgraphicsview.cpp:370 q = (QGraphicsView * const) 0x8e32538 width = 22975848 height = 26116084 scrollBarExtent = <value optimized out> oldLeftIndent = 0 oldTopIndent = 7.4679457135539938e-316 left = <value optimized out> top = <value optimized out> bottom = <value optimized out> useVerticalScrollBar = <value optimized out> right = <value optimized out> viewRect = {xp = -0.0018627718091011123, yp = -0.0018624216640948498, w = 4.5862571482618553e-302, h = -0.001862257751321714} useHorizontalScrollBar = <value optimized out> #7 0x01659d23 in QGraphicsView::updateSceneRect (this=0x8e32538, rect=@0x8df88a4) at graphicsview/qgraphicsview.cpp:2646 d = (QGraphicsViewPrivate * const) 0x0 #8 0x0165b365 in QGraphicsView::qt_metacall (this=0x8e32538, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0xbf5e8508) at .moc/release-shared/moc_qgraphicsview.cpp:161 No locals. #9 0x0808d7ff in ZoomWidget (this=0x0, parent=0x0) at /usr/include/qt4/QtCore/qglobal.h:2185 No locals. #10 0x05490f3a in QMetaObject::metacall (object=0x8e32538, cl=26116084, idx=35, argv=0xbf5e8508) at kernel/qmetaobject.cpp:237 mo = <value optimized out> #11 0x054a3ccd in QMetaObject::activate (sender=0x8df7f48, m=0x80ac888, local_signal_index=1, argv=0x0) at kernel/qobject.cpp:3280 method = 35 currentSender = {sender = 0x8df7f48, signal = 5, ref = 1} receiverInSameThread = true previousSender = (QObjectPrivate::Sender *) 0xbf5e8908 c = (QObjectPrivate::Connection *) 0x8dfb008 last = (QObjectPrivate::Connection *) 0x8dfb008 methodOffset = <value optimized out> signal_absolute_index = 5 empty_argv = {0x0} currentThreadData = (QThreadData *) 0x8abc0a0 locker = {val = 145983080} connectionLists = (QObjectConnectionListVector *) 0x8df8be0 signalOffset = <value optimized out> signal_index = 3 #12 0x0161d143 in QGraphicsScene::sceneRectChanged (this=0x8df7f48, _t1=@0x8df88a4) at .moc/release-shared/moc_qgraphicsscene.cpp:193 _a = {0x0, 0x8df88a4} #13 0x01632d87 in QGraphicsScene::sceneRect (this=0x8df7f48) at graphicsview/qgraphicsscene.cpp:1665 d = (const QGraphicsScenePrivate * const) 0x8df8818 #14 0x0164ea6d in QGraphicsView::sceneRect (this=0x8e32538) at graphicsview/qgraphicsview.cpp:1693 d = <value optimized out> #15 0x01659316 in QGraphicsViewPrivate::recalculateContentSize ( this=0x8e32570) at graphicsview/qgraphicsview.cpp:373 q = (QGraphicsView * const) 0x8e32538 width = 634 height = 474 scrollBarExtent = <value optimized out> oldLeftIndent = 0 oldTopIndent = 7.4679457135539938e-316 left = <value optimized out> top = <value optimized out> bottom = <value optimized out> useVerticalScrollBar = <value optimized out> right = <value optimized out> viewRect = {xp = -0.0018637999892234878, yp = -0.0018634498442172253, w = 4.5862571482624273e-302, h = -0.0018632859314440895} useHorizontalScrollBar = <value optimized out> #16 0x01659d23 in QGraphicsView::updateSceneRect (this=0x8e32538, rect=@0x8df88a4) at graphicsview/qgraphicsview.cpp:2646 d = (QGraphicsViewPrivate * const) 0x0 #17 0x0165b365 in QGraphicsView::qt_metacall (this=0x8e32538, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0xbf5e8958) at .moc/release-shared/moc_qgraphicsview.cpp:161 No locals. #18 0x0808d7ff in ZoomWidget (this=0x0, parent=0x0) at /usr/include/qt4/QtCore/qglobal.h:2185 No locals. #19 0x05490f3a in QMetaObject::metacall (object=0x8e32538, cl=26116084, idx=35, argv=0xbf5e8958) at kernel/qmetaobject.cpp:237 mo = <value optimized out> #20 0x054a3ccd in QMetaObject::activate (sender=0x8df7f48, m=0x80ac888, local_signal_index=1, argv=0x0) at kernel/qobject.cpp:3280 method = 35 currentSender = {sender = 0x8df7f48, signal = 5, ref = 1} receiverInSameThread = true previousSender = (QObjectPrivate::Sender *) 0xbf5e8d58 c = (QObjectPrivate::Connection *) 0x8dfb008 last = (QObjectPrivate::Connection *) 0x8dfb008 methodOffset = <value optimized out> signal_absolute_index = 5 empty_argv = {0x0} currentThreadData = (QThreadData *) 0x8abc0a0 locker = {val = 145983080} connectionLists = (QObjectConnectionListVector *) 0x8df8be0 signalOffset = <value optimized out> signal_index = 3 #21 0x0161d143 in QGraphicsScene::sceneRectChanged (this=0x8df7f48, _t1=@0x8df88a4) at .moc/release-shared/moc_qgraphicsscene.cpp:193 _a = {0x0, 0x8df88a4} #22 0x01632d87 in QGraphicsScene::sceneRect (this=0x8df7f48) at graphicsview/qgraphicsscene.cpp:1665 d = (const QGraphicsScenePrivate * const) 0x8df8818 #23 0x0164ea6d in QGraphicsView::sceneRect (this=0x8e32538) at graphicsview/qgraphicsview.cpp:1693 d = <value optimized out> #24 0x01659316 in QGraphicsViewPrivate::recalculateContentSize ( this=0x8e32570) at graphicsview/qgraphicsview.cpp:373 q = (QGraphicsView * const) 0x8e32538 width = 634 height = 474 scrollBarExtent = <value optimized out> oldLeftIndent = 0 oldTopIndent = 7.4679457135539938e-316 left = <value optimized out> top = <value optimized out> bottom = <value optimized out> useVerticalScrollBar = <value optimized out> right = <value optimized out> viewRect = {xp = -0.0018648281693458633, yp = -0.0018644780243396008, w = 4.5862571482629992e-302, h = -0.001864314111566465} useHorizontalScrollBar = <value optimized out> #25 0x01659d23 in QGraphicsView::updateSceneRect (this=0x8e32538, rect=@0x8df88a4) at graphicsview/qgraphicsview.cpp:2646 d = (QGraphicsViewPrivate * const) 0x0 #26 0x0165b365 in QGraphicsView::qt_metacall (this=0x8e32538, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0xbf5e8da8) at .moc/release-shared/moc_qgraphicsview.cpp:161 No locals. #27 0x0808d7ff in ZoomWidget (this=0x0, parent=0x0) at /usr/include/qt4/QtCore/qglobal.h:2185 No locals. #28 0x05490f3a in QMetaObject::metacall (object=0x8e32538, cl=26116084, idx=35, argv=0xbf5e8da8) at kernel/qmetaobject.cpp:237 mo = <value optimized out> #29 0x054a3ccd in QMetaObject::activate (sender=0x8df7f48, m=0x80ac888, local_signal_index=1, argv=0x0) at kernel/qobject.cpp:3280 method = 35 currentSender = {sender = 0x8df7f48, signal = 5, ref = 1} receiverInSameThread = true previousSender = (QObjectPrivate::Sender *) 0xbf5e91a8 c = (QObjectPrivate::Connection *) 0x8dfb008 last = (QObjectPrivate::Connection *) 0x8dfb008 methodOffset = <value optimized out> signal_absolute_index = 5 empty_argv = {0x0} currentThreadData = (QThreadData *) 0x8abc0a0 locker = {val = 145983080} connectionLists = (QObjectConnectionListVector *) 0x8df8be0 signalOffset = <value optimized out> signal_index = 3 #30 0x0161d143 in QGraphicsScene::sceneRectChanged (this=0x8df7f48, _t1=@0x8df88a4) at .moc/release-shared/moc_qgraphicsscene.cpp:193 _a = {0x0, 0x8df88a4} #31 0x01632d87 in QGraphicsScene::sceneRect (this=0x8df7f48) at graphicsview/qgraphicsscene.cpp:1665 d = (const QGraphicsScenePrivate * const) 0x8df8818 #32 0x0164ea6d in QGraphicsView::sceneRect (this=0x8e32538) at graphicsview/qgraphicsview.cpp:1693 d = <value optimized out> #33 0x01659316 in QGraphicsViewPrivate::recalculateContentSize ( this=0x8e32570) at graphicsview/qgraphicsview.cpp:373 q = (QGraphicsView * const) 0x8e32538 width = 634 height = 474 scrollBarExtent = <value optimized out> oldLeftIndent = 0 oldTopIndent = 7.4679457135539938e-316 left = <value optimized out> top = <value optimized out> bottom = <value optimized out> useVerticalScrollBar = <value optimized out> right = <value optimized out> viewRect = {xp = -0.0018658563494682388, yp = -0.0018655062044619763, w = 4.5862571482635712e-302, h = -0.0018653422916888405} useHorizontalScrollBar = <value optimized out> #34 0x01659d23 in QGraphicsView::updateSceneRect (this=0x8e32538, rect=@0x8df88a4) at graphicsview/qgraphicsview.cpp:2646 d = (QGraphicsViewPrivate * const) 0x0 #35 0x0165b365 in QGraphicsView::qt_metacall (this=0x8e32538, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0xbf5e91f8) at .moc/release-shared/moc_qgraphicsview.cpp:161 This snippet repeats for about 2000 frames, suggesting some sort of infinite recursion. It also appears that there is a null ZoomWidget pointer in there. Here is a permalink to the full backtrace attachment at the Launchpad bug: http://launchpadlibrarian.net/51781019/Stacktrace.txt Reproducible: Didn't try
Thank you for the report, Jonathan. As it has been a while since this was reported, can you please test and confirm if this issue is still occurring or if this bug report can be marked as resolved. I have set the bug status to "needsinfo" pending your response, please change back to "reported" or "resolved/worksforme" when you respond, thank you.
Dear Bug Submitter, This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging If you have already provided the requested information, please mark the bug as REPORTED so that the KDE team knows that the bug is ready to be confirmed. Thank you for helping us make KDE software even better for everyone!
This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!