Application: kwin (4.6.4 (4.6.4))
KDE Platform Version: 4.6.4 (4.6.4)
Qt Version: 4.7.2
Operating System: Linux 2.6.38-8-generic x86_64
Distribution: Ubuntu 11.04

-- Information about the crash:
- What I was doing when the application crashed:Host system: Fresh install of Kubuntu Amd_64 Desktop. VMM: Virtual Box 4.0.10. Installed Guest in which crash occured: SimplyMEPIS 11 32bit. Out of a possible 128mb in VMM, I dedicated 32mb of video ram. During the installation of the guest additions, Kwin crashed. It automagically restarted, so no big deal... Firefox 4.0 also running in background consuming about 290 mb. Video card: Nvidia 9600m GT with latest drivers.

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f42152577c0 (LWP 1839))]

Thread 3 (Thread 0x7f41f87cb700 (LWP 1869)):
#0  0xffffffffff60017b in ?? ()
#1  0x00007f41f87ca9f0 in ?? ()
#2  0x00007fff1bf667b2 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 2 (Thread 0x7f41f7fba700 (LWP 1870)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f42139072a2 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7f4213c20180) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007f42139072d9 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=0x7f4213c2e254) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007f4212302853 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#4  0x00007f420b3d3d8c in start_thread (arg=0x7f41f7fba700) at pthread_create.c:304
#5  0x00007f4214aa904d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f42152577c0 (LWP 1839)):
[KCrash Handler]
#6  0x00007f4213f7f676 in Plasma::Corona::popupPosition (this=0x2553be0, item=0x24ac890, s=..., alignment=<value optimized out>) at ../../plasma/corona.cpp:608
#7  0x00007f421401cbc4 in Plasma::ToolTipManagerPrivate::showToolTip (this=0xe07b20) at ../../plasma/tooltipmanager.cpp:399
#8  0x00007f421401cf65 in Plasma::ToolTipManager::qt_metacall (this=0x12174d0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff1bf14220) at ./tooltipmanager.moc:88
#9  0x00007f4210ddc5f8 in QMetaObject::activate (sender=0x121c790, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x0) at kernel/qobject.cpp:3287
#10 0x00007f4210ddb1c9 in QObject::event (this=0x121c790, e=<value optimized out>) at kernel/qobject.cpp:1190
#11 0x00007f42101889e4 in QApplicationPrivate::notify_helper (this=0x978600, receiver=0x121c790, e=0x7fff1bf14920) at kernel/qapplication.cpp:4462
#12 0x00007f421018d3aa in QApplication::notify (this=<value optimized out>, receiver=0x121c790, e=0x7fff1bf14920) at kernel/qapplication.cpp:4341
#13 0x00007f42145a4716 in KApplication::notify (this=0x7fff1bf14d20, receiver=0x121c790, event=0x7fff1bf14920) at ../../kdeui/kernel/kapplication.cpp:311
#14 0x00007f4210dc749c in QCoreApplication::notifyInternal (this=0x7fff1bf14d20, receiver=0x121c790, event=0x7fff1bf14920) at kernel/qcoreapplication.cpp:731
#15 0x00007f4210df4f12 in sendEvent (this=0x9791c0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#16 QTimerInfoList::activateTimers (this=0x9791c0) at kernel/qeventdispatcher_unix.cpp:604
#17 0x00007f4210df505b in QEventDispatcherUNIX::processEvents (this=0x8dd340, flags=...) at kernel/qeventdispatcher_unix.cpp:923
#18 0x00007f4210230c0c in QEventDispatcherX11::processEvents (this=0x8dd340, flags=...) at kernel/qeventdispatcher_x11.cpp:152
#19 0x00007f4210dc6882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#20 0x00007f4210dc6abc in QEventLoop::exec (this=0x7fff1bf14c60, flags=...) at kernel/qeventloop.cpp:201
#21 0x00007f4210dcaecb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1008
#22 0x00007f4214db014c in kdemain (argc=<value optimized out>, argv=0x7fff1bf153b8) at ../../kwin/main.cpp:542
#23 0x00007f42149e1eff in __libc_start_main (main=0x400740 <main(int, char**)>, argc=3, ubp_av=0x7fff1bf153b8, init=<value optimized out>, fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=0x7fff1bf153a8) at libc-start.c:226
#24 0x0000000000400669 in _start ()

Possible duplicates by query: bug 275183, bug 274748, bug 274581, bug 273579, bug 271482.

Reported using DrKonqi