Application: kwin (4.10.00)
KDE Platform Version: 4.10.00
Qt Version: 4.8.3
Operating System: Linux 3.5.0-25-generic x86_64
Distribution: Netrunner 12.12

-- Information about the crash:
- What I was doing when the application crashed:
Change pager row count

- Unusual behavior I noticed:
Pager always starts with wrong height. ie.: 1 row arrangement boxes are aligned at the top half of the panel, as though there's a ghost lower row unseen.  Corrected togling row count in the pager properties, however that action crashes kwin.   

- I can confirm other window decoration related crashes that seem already been reported.  

(nvidia-nuevo driver)
thanks

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f39c99ac7c0 (LWP 2617))]

Thread 3 (Thread 0x7f39ad4e2700 (LWP 2622)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f39c5ab6cd7 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f39c5ab6d09 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f39bd594e9a in start_thread (arg=0x7f39ad4e2700) at pthread_create.c:308
#4  0x00007f39c91bfcbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f39a7752700 (LWP 2623)):
#0  0x00007fffca9ff65e in clock_gettime ()
#1  0x00007f39be1c615d in __GI_clock_gettime (clock_id=<optimized out>, tp=<optimized out>) at ../sysdeps/unix/clock_gettime.c:116
#2  0x00007f39c452e9f4 in do_gettime (frac=0x7f39a7751be8, sec=0x7f39a7751be0) at tools/qelapsedtimer_unix.cpp:123
#3  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#4  0x00007f39c460444d in QTimerInfoList::updateCurrentTime (this=this@entry=0x7f39a0001178) at kernel/qeventdispatcher_unix.cpp:343
#5  0x00007f39c4604793 in QTimerInfoList::timerWait (this=this@entry=0x7f39a0001178, tm=...) at kernel/qeventdispatcher_unix.cpp:450
#6  0x00007f39c4606624 in QEventDispatcherUNIX::processEvents (this=0x7f39a00008f0, flags=...) at kernel/qeventdispatcher_unix.cpp:913
#7  0x00007f39c45d42ef in QEventLoop::processEvents (this=this@entry=0x7f39a7751d90, flags=...) at kernel/qeventloop.cpp:149
#8  0x00007f39c45d4578 in QEventLoop::exec (this=0x7f39a7751d90, flags=...) at kernel/qeventloop.cpp:204
#9  0x00007f39c44d5b40 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#10 0x00007f39c45b49df in QInotifyFileSystemWatcherEngine::run (this=0x1a1e270) at io/qfilesystemwatcher_inotify.cpp:248
#11 0x00007f39c44d8b1c in QThreadPrivate::start (arg=0x1a1e270) at thread/qthread_unix.cpp:338
#12 0x00007f39bd594e9a in start_thread (arg=0x7f39a7752700) at pthread_create.c:308
#13 0x00007f39c91bfcbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#14 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f39c99ac7c0 (LWP 2617)):
[KCrash Handler]
#6  0x00007f39c8140dd4 in QDeclarativeItem::~QDeclarativeItem (this=0x2037150, __in_chrg=<optimized out>) at graphicsitems/qdeclarativeitem.cpp:1668
#7  0x00007f39c81046ee in ~QDeclarativeElement (this=0x2037150, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#8  QDeclarativePrivate::QDeclarativeElement<QDeclarativeItem>::~QDeclarativeElement (this=0x2037150, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#9  0x00007f39c45ea498 in QObject::event (this=0x2037150, e=<optimized out>) at kernel/qobject.cpp:1176
#10 0x00007f39c397ce9c in QApplicationPrivate::notify_helper (this=this@entry=0x15c2ca0, receiver=receiver@entry=0x2037150, e=e@entry=0x2461fe0) at kernel/qapplication.cpp:4562
#11 0x00007f39c398130a in QApplication::notify (this=0x7fffca9896d0, receiver=0x2037150, e=0x2461fe0) at kernel/qapplication.cpp:4423
#12 0x00007f39c8cad636 in KApplication::notify (this=0x7fffca9896d0, receiver=0x2037150, event=0x2461fe0) at ../../kdeui/kernel/kapplication.cpp:311
#13 0x00007f39c45d559e in QCoreApplication::notifyInternal (this=0x7fffca9896d0, receiver=receiver@entry=0x2037150, event=event@entry=0x2461fe0) at kernel/qcoreapplication.cpp:915
#14 0x00007f39c45d9421 in sendEvent (event=0x2461fe0, receiver=0x2037150) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#15 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x15591f0) at kernel/qcoreapplication.cpp:1539
#16 0x00007f39c3a2289c in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#17 QEventDispatcherX11::processEvents (this=0x155aad0, flags=...) at kernel/qeventdispatcher_x11.cpp:75
#18 0x00007f39c45d42ef in QEventLoop::processEvents (this=this@entry=0x7fffca9893e0, flags=...) at kernel/qeventloop.cpp:149
#19 0x00007f39c45d4578 in QEventLoop::exec (this=0x7fffca9893e0, flags=...) at kernel/qeventloop.cpp:204
#20 0x00007f39c45d9738 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1187
#21 0x00007f39c94f2d5a in kdemain (argc=3, argv=0x7fffca989818) at ../../kwin/main.cpp:537
#22 0x00007f39c90ed76d in __libc_start_main (main=0x4006a0 <main(int, char**)>, argc=3, ubp_av=0x7fffca989818, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffca989808) at libc-start.c:226
#23 0x00000000004006d1 in _start ()

Possible duplicates by query: bug 315087, bug 314891, bug 314758, bug 314737, bug 314716.

Reported using DrKonqi