Bug 271435 - Kwin crashes on maximising konsole
Summary: Kwin crashes on maximising konsole
Status: RESOLVED FIXED
Alias: None
Product: kwin
Classification: Plasma
Component: aurorae (show other bugs)
Version: unspecified
Platform: Compiled Sources Linux
: NOR crash
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2011-04-21 17:14 UTC by Karan Pratap Singh
Modified: 2012-01-13 17:20 UTC (History)
1 user (show)

See Also:
Latest Commit:
Version Fixed In: 4.9.0

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Description Karan Pratap Singh 2011-04-21 17:14:33 UTC 
Application: kwin (4.6.41 (4.7 >= 20110106))
KDE Platform Version: 4.6.41 (4.7 >= 20110106) (Compiled from sources)
Qt Version: 4.7.1
Operating System: Linux 2.6.35-28-generic-pae i686
Distribution: Ubuntu 10.10

-- Information about the crash:
I was using konsole and I maximised it and then KWin crashed.

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwin), signal: Aborted
[Current thread is 1 (Thread 0xb2290720 (LWP 1539))]

Thread 2 (Thread 0xafc3eb70 (LWP 1558)):
#0  0xb7890424 in __kernel_vsyscall ()
#1  0xb65a14dc in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0xb7589a2d in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0xb76f3ce0) at /home/kde-devel/kdesrc/qt-copy/src/3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#3  0xb7589171 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=0xb76f3ce0) at /home/kde-devel/kdesrc/qt-copy/src/3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#4  0xb659ccc9 in start_thread () from /lib/libpthread.so.0
#5  0xb54ba69e in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb2290720 (LWP 1539)):
[KCrash Handler]
#7  0xb7890424 in __kernel_vsyscall ()
#8  0xb5414941 in raise () from /lib/libc.so.6
#9  0xb5417e42 in abort () from /lib/libc.so.6
#10 0xb66375c7 in qt_message_output (msgType=QtFatalMsg, buf=0xa74feb8 "ASSERT: \"d\" in file ../../include/QtCore/../../../../qt-copy/src/corelib/tools/qscopedpointer.h, line 112") at /home/kde-devel/kdesrc/qt-copy/src/corelib/global/qglobal.cpp:2282
#11 0xb66377bd in qt_message (msgType=QtFatalMsg, msg=0xb67e4df4 "ASSERT: \"%s\" in file %s, line %d", ap=0xbfb28934 "l\004\063\266 \004\063\266p") at /home/kde-devel/kdesrc/qt-copy/src/corelib/global/qglobal.cpp:2328
#12 0xb6637bda in qFatal (msg=0xb67e4df4 "ASSERT: \"%s\" in file %s, line %d") at /home/kde-devel/kdesrc/qt-copy/src/corelib/global/qglobal.cpp:2511
#13 0xb6637128 in qt_assert (assertion=0xb633046c "d", file=0xb6330420 "../../include/QtCore/../../../../qt-copy/src/corelib/tools/qscopedpointer.h", line=112) at /home/kde-devel/kdesrc/qt-copy/src/corelib/global/qglobal.cpp:2027
#14 0xb61cb5d5 in QScopedPointer<QGraphicsItemPrivate, QScopedPointerDeleter<QGraphicsItemPrivate> >::operator-> (this=0xa71487c) at ../../include/QtCore/../../../../qt-copy/src/corelib/tools/qscopedpointer.h:112
#15 0xb61b7a47 in QGraphicsItem::update (this=0xa714878, rect=...) at /home/kde-devel/kdesrc/qt-copy/src/gui/graphicsview/qgraphicsitem.cpp:5661
#16 0xb072015f in Aurorae::AuroraeMaximizeButton::mouseReleaseEvent (this=0xa714870, event=0xbfb29174) at /home/kde-devel/kdesrc/kde-workspace/kwin/clients/aurorae/src/lib/auroraebutton.cpp:398
#17 0xb61ba13a in QGraphicsItem::sceneEvent (this=0xa714878, event=0xbfb29174) at /home/kde-devel/kdesrc/qt-copy/src/gui/graphicsview/qgraphicsitem.cpp:6701
#18 0xb6223d4f in QGraphicsWidget::sceneEvent (this=0xa714870, event=0xbfb29174) at /home/kde-devel/kdesrc/qt-copy/src/gui/graphicsview/qgraphicswidget.cpp:1175
#19 0xb61e4de3 in QGraphicsScenePrivate::sendEvent (this=0xa5b2f18, item=0xa714878, event=0xbfb29174) at /home/kde-devel/kdesrc/qt-copy/src/gui/graphicsview/qgraphicsscene.cpp:1207
#20 0xb61e551a in QGraphicsScenePrivate::sendMouseEvent (this=0xa5b2f18, mouseEvent=0xbfb29174) at /home/kde-devel/kdesrc/qt-copy/src/gui/graphicsview/qgraphicsscene.cpp:1281
#21 0xb61ed752 in QGraphicsScene::mouseReleaseEvent (this=0xa711338, mouseEvent=0xbfb29174) at /home/kde-devel/kdesrc/qt-copy/src/gui/graphicsview/qgraphicsscene.cpp:4107
#22 0xb0727d66 in Aurorae::AuroraeScene::mouseReleaseEvent (this=0xa711338, event=0xbfb29174) at /home/kde-devel/kdesrc/kde-workspace/kwin/clients/aurorae/src/lib/auroraescene.cpp:946
#23 0xb61eb90b in QGraphicsScene::event (this=0xa711338, event=0xbfb29174) at /home/kde-devel/kdesrc/qt-copy/src/gui/graphicsview/qgraphicsscene.cpp:3440
#24 0xb5a5e17e in QApplicationPrivate::notify_helper (this=0x97011c8, receiver=0xa711338, e=0xbfb29174) at /home/kde-devel/kdesrc/qt-copy/src/gui/kernel/qapplication.cpp:4445
#25 0xb5a5ba0d in QApplication::notify (this=0xbfb2a10c, receiver=0xa711338, e=0xbfb29174) at /home/kde-devel/kdesrc/qt-copy/src/gui/kernel/qapplication.cpp:3845
#26 0xb6e13212 in KApplication::notify (this=0xbfb2a10c, receiver=0xa711338, event=0xbfb29174) at /home/kde-devel/kdesrc/kdelibs/kdeui/kernel/kapplication.cpp:311
#27 0xb77a814a in KWin::Application::notify (this=0xbfb2a10c, o=0xa711338, e=0xbfb29174) at /home/kde-devel/kdesrc/kde-workspace/kwin/main.cpp:364
#28 0xb6761338 in QCoreApplication::notifyInternal (this=0xbfb2a10c, receiver=0xa711338, event=0xbfb29174) at /home/kde-devel/kdesrc/qt-copy/src/corelib/kernel/qcoreapplication.cpp:732
#29 0xb5a60a33 in QCoreApplication::sendSpontaneousEvent (receiver=0xa711338, event=0xbfb29174) at ../../include/QtCore/../../../../qt-copy/src/corelib/kernel/qcoreapplication.h:218
#30 0xb5a5e4ef in qt_sendSpontaneousEvent (receiver=0xa711338, event=0xbfb29174) at /home/kde-devel/kdesrc/qt-copy/src/gui/kernel/qapplication.cpp:5439
#31 0xb621cdcb in QGraphicsView::mouseReleaseEvent (this=0xa6a34c0, event=0xbfb29960) at /home/kde-devel/kdesrc/qt-copy/src/gui/graphicsview/qgraphicsview.cpp:3336
#32 0xb5acb3d8 in QWidget::event (this=0xa6a34c0, event=0xbfb29960) at /home/kde-devel/kdesrc/qt-copy/src/gui/kernel/qwidget.cpp:8200
#33 0xb5f7131c in QFrame::event (this=0xa6a34c0, e=0xbfb29960) at /home/kde-devel/kdesrc/qt-copy/src/gui/widgets/qframe.cpp:557
#34 0xb6020b61 in QAbstractScrollArea::viewportEvent (this=0xa6a34c0, e=0xbfb29960) at /home/kde-devel/kdesrc/qt-copy/src/gui/widgets/qabstractscrollarea.cpp:1043
#35 0xb621af6e in QGraphicsView::viewportEvent (this=0xa6a34c0, event=0xbfb29960) at /home/kde-devel/kdesrc/qt-copy/src/gui/graphicsview/qgraphicsview.cpp:2864
#36 0xb60216d5 in QAbstractScrollAreaPrivate::viewportEvent (this=0xa6d5c18, event=0xbfb29960) at /home/kde-devel/kdesrc/qt-copy/src/gui/widgets/qabstractscrollarea_p.h:100
#37 0xb60217c0 in QAbstractScrollAreaFilter::eventFilter (this=0xa5a9238, o=0xa78ad48, e=0xbfb29960) at /home/kde-devel/kdesrc/qt-copy/src/gui/widgets/qabstractscrollarea_p.h:116
#38 0xb6761617 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=0x97011c8, receiver=0xa78ad48, event=0xbfb29960) at /home/kde-devel/kdesrc/qt-copy/src/corelib/kernel/qcoreapplication.cpp:847
#39 0xb5a5e15a in QApplicationPrivate::notify_helper (this=0x97011c8, receiver=0xa78ad48, e=0xbfb29960) at /home/kde-devel/kdesrc/qt-copy/src/gui/kernel/qapplication.cpp:4441
#40 0xb5a5c1f7 in QApplication::notify (this=0xbfb2a10c, receiver=0xa78ad48, e=0xbfb29960) at /home/kde-devel/kdesrc/qt-copy/src/gui/kernel/qapplication.cpp:4006
#41 0xb6e13212 in KApplication::notify (this=0xbfb2a10c, receiver=0xa78ad48, event=0xbfb29960) at /home/kde-devel/kdesrc/kdelibs/kdeui/kernel/kapplication.cpp:311
#42 0xb77a814a in KWin::Application::notify (this=0xbfb2a10c, o=0xa78ad48, e=0xbfb29960) at /home/kde-devel/kdesrc/kde-workspace/kwin/main.cpp:364
#43 0xb6761338 in QCoreApplication::notifyInternal (this=0xbfb2a10c, receiver=0xa78ad48, event=0xbfb29960) at /home/kde-devel/kdesrc/qt-copy/src/corelib/kernel/qcoreapplication.cpp:732
#44 0xb5a60a33 in QCoreApplication::sendSpontaneousEvent (receiver=0xa78ad48, event=0xbfb29960) at ../../include/QtCore/../../../../qt-copy/src/corelib/kernel/qcoreapplication.h:218
#45 0xb5a5a9a0 in QApplicationPrivate::sendMouseEvent (receiver=0xa78ad48, event=0xbfb29960, alienWidget=0x0, nativeWidget=0xa78ad48, buttonDown=0xb6594780, lastMouseReceiver=..., spontaneous=true) at /home/kde-devel/kdesrc/qt-copy/src/gui/kernel/qapplication.cpp:3103
#46 0xb5b044fe in QETWidget::translateMouseEvent (this=0xa78ad48, event=0xbfb29f4c) at /home/kde-devel/kdesrc/qt-copy/src/gui/kernel/qapplication_x11.cpp:4438
#47 0xb5b00d72 in QApplication::x11ProcessEvent (this=0xbfb2a10c, event=0xbfb29f4c) at /home/kde-devel/kdesrc/qt-copy/src/gui/kernel/qapplication_x11.cpp:3442
#48 0xb5b3c329 in QEventDispatcherX11::processEvents (this=0x96fe840, flags=...) at /home/kde-devel/kdesrc/qt-copy/src/gui/kernel/qeventdispatcher_x11.cpp:132
#49 0xb675e717 in QEventLoop::processEvents (this=0xbfb2a06c, flags=...) at /home/kde-devel/kdesrc/qt-copy/src/corelib/kernel/qeventloop.cpp:149
#50 0xb675e85c in QEventLoop::exec (this=0xbfb2a06c, flags=...) at /home/kde-devel/kdesrc/qt-copy/src/corelib/kernel/qeventloop.cpp:201
#51 0xb6761a2b in QCoreApplication::exec () at /home/kde-devel/kdesrc/qt-copy/src/corelib/kernel/qcoreapplication.cpp:1009
#52 0xb5a5b666 in QApplication::exec () at /home/kde-devel/kdesrc/qt-copy/src/gui/kernel/qapplication.cpp:3719
#53 0xb77a9256 in kdemain (argc=1, argv=0xbfb2a364) at /home/kde-devel/kdesrc/kde-workspace/kwin/main.cpp:522
#54 0x080487c9 in main (argc=1, argv=0xbfb2a364) at /home/kde-devel/kdesrc/build/kde-workspace/kwin/kwin_dummy.cpp:3

Reported using DrKonqi
Comment 1 Thomas Lübking 2011-04-21 20:26:05 UTC 

*** This bug has been marked as a duplicate of bug 242165 ***
Comment 2 Martin Flöser 2011-05-06 22:21:07 UTC 
I don't think it is the same crash as the duplicate is an assert while the original crash was a crash.
Comment 3 Martin Flöser 2011-05-06 22:22:23 UTC 
are you able to reproduce the crash with a more recent version of qt?
Comment 4 Thomas Lübking 2011-05-06 22:48:06 UTC 
errr... just for the records:

Both traces land in Aurorae::AuroraeMaximizeButton::mouseReleaseEvent() which pot. trigger(s/ed) a self-deletion.
There's called QGraphicsItem::update() and the assumed dupe calls QGraphicsItemPrivate::invalidateParentGraphicsEffectsRecursively(this = 0x0) while this one ends up in an assert in qscopedpointer.h (which means "attempted access to the managed pointer being NULL")

On a string based comparism they're certainly not equal but my Jedi senses tell me - it's the same solution, if not even bug =)
Comment 5 Martin Flöser 2011-05-06 22:58:46 UTC 
> On a string based comparism they're certainly not equal but my Jedi senses tell
> me - it's the same solution, if not even bug =)
Yes they look very similar, nevertheless I assume that I did a proper fix for the crash ;-) and that 
something else is hitting the assert (and the assert is probably compiled-out on most systems, 
but we still don't get crash reports).
Comment 6 Martin Flöser 2011-05-07 13:20:32 UTC 
btw I cannot reproduce
Comment 7 Jekyll Wu 2011-12-05 19:13:57 UTC 
I can't reproduce this using KDE SC 4.8 beta1 and Qt 4.8 rc1 .
Comment 8 Thomas Lübking 2011-12-05 20:53:39 UTC 
(In reply to comment #7)
> I can't reproduce this using KDE SC 4.8 beta1 and Qt 4.8 rc1 .

Has it happened to you before?

So far no developer could reproduce this - ever.
(I actually feel tempted to blame downstream...)

So unless it happened to you before, that's nice to know - but unfortunately meaningless :-(
Comment 9 Martin Flöser 2012-01-13 17:20:42 UTC 
at latest fixed with Aurorae 3 in 4.9