Version:           2.4-snapshots (using Devel) 
OS:                MS Windows

WINDOWS 7 - HOME PREMIUM (64 BIT)
KRITA 2.4 BETA 5

BTW, The "same" crash occurs on Ubuntu 11.10 (krita 2.4 beta 4)




Reproducible: Always

Steps to Reproduce:
1. Fire up Krita 2.4 beta 5;
2. Open no matter what image (Krita always crashes later);
3. create a new text; increase its size (because on Windows its default value,8.25 is really *small!*;
4. Select this text layer;
5. Move around very fast this text layer on the canvas;
6. Bang! Krita always crashes sooner or later :-)

You can download a video with all my steps to reproduce this crash on Windows7:
http://dl.dropbox.com/u/3095134/WINDOWS_7_KRITA_TEXT_CRASH.zip

Actual Results:  
krita 2.4 beta 5 crashes on Windows 7 while moving a text layer (the same occurs on Ubuntu 11.10)

Expected Results:  
Krita should not crash while moving a layer text very fast

I have tried to reproduce this same bug on:

UBUNTU 11.10 - 64 bit (Oneiric Ocelot) - UNITY SHELL
Kde 4.7.4
KRITA 2.4 - BETA 4 (installed through ppa:neon/ppa - project-neon)
OpenGl is disabled (Setting > Configures > Display)
Vbox 4.1.4 (Windows 7 as Host; Ubuntu is the guest)
My Distro is always updated - upgraded daily (so it is the ppa:neon/ppa package)

Here is the backtrace on Ubuntu Oneiric:
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff53a9227 in QReadWriteLock::lockForRead (this=0xcfbae38)
    at thread/qreadwritelock.cpp:152
152	thread/qreadwritelock.cpp: File o directory non esistente.
	in thread/qreadwritelock.cpp
(gdb) thread apply all bt

Thread 21 (Thread 0x7fffc1bbd700 (LWP 2490)):
#0  0x00007ffff05533cb in pthread_cond_timedwait@@GLIBC_2.3.2 ()
   from /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007ffff53afeaf in QWaitConditionPrivate::wait (this=0x43c2af0, 
    time=30000) at thread/qwaitcondition_unix.cpp:86
#2  0x00007ffff53afc75 in QWaitCondition::wait (this=0x43c2a28, 
    mutex=0x43c2a20, time=30000) at thread/qwaitcondition_unix.cpp:160
#3  0x00007ffff539e28d in QThreadPoolThread::run (this=0x40e2d80)
    at concurrent/qthreadpool.cpp:140
#4  0x00007ffff53ae97f in QThreadPrivate::start (arg=0x40e2d80)
    at thread/qthread_unix.cpp:331
#5  0x00007ffff054eefc in start_thread ()
   from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x00007ffff78d589d in clone () from /lib/x86_64-linux-gnu/libc.so.6
#7  0x0000000000000000 in ?? ()

Thread 12 (Thread 0x7fffc3ec1700 (LWP 2481)):
#0  0x00007ffff78ce913 in select () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007ffff5500095 in qt_safe_select (nfds=44, fdread=0x59da7c0, 
    fdwrite=0x59daa58, fdexcept=0x59dacf0, orig_timeout=0x0)
    at kernel/qcore_unix.cpp:82
#2  0x00007ffff550723a in QEventDispatcherUNIX::select (this=0x598a5b0, 
---Type <return> to continue, or q <return> to quit---
    nfds=44, readfds=0x59da7c0, writefds=0x59daa58, exceptfds=0x59dacf0, 
    timeout=0x0) at kernel/qeventdispatcher_unix.cpp:631
#3  0x00007ffff5505d57 in QEventDispatcherUNIXPrivate::doSelect (
    this=0x59da600, flags=..., timeout=0x0)
    at kernel/qeventdispatcher_unix.cpp:219
#4  0x00007ffff55081da in QEventDispatcherUNIX::processEvents (this=0x598a5b0, 
    flags=...) at kernel/qeventdispatcher_unix.cpp:918
#5  0x00007ffff54c8ed4 in QEventLoop::processEvents (this=0x7fffc3ec0d50, 
    flags=...) at kernel/qeventloop.cpp:149
#6  0x00007ffff54c9028 in QEventLoop::exec (this=0x7fffc3ec0d50, flags=...)
    at kernel/qeventloop.cpp:201
#7  0x00007ffff53ac15b in QThread::exec (this=0x588fc70)
    at thread/qthread.cpp:498
#8  0x00007ffff54a8057 in QInotifyFileSystemWatcherEngine::run (this=0x588fc70)
    at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007ffff53ae97f in QThreadPrivate::start (arg=0x588fc70)
    at thread/qthread_unix.cpp:331
#10 0x00007ffff054eefc in start_thread ()
   from /lib/x86_64-linux-gnu/libpthread.so.0
#11 0x00007ffff78d589d in clone () from /lib/x86_64-linux-gnu/libc.so.6
#12 0x0000000000000000 in ?? ()

Thread 11 (Thread 0x7fffc36c0700 (LWP 2480)):
---Type <return> to continue, or q <return> to quit---
#0  0x00007ffff055304c in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007ffff53afecb in QWaitConditionPrivate::wait (this=0x588fb70, 
    time=18446744073709551615) at thread/qwaitcondition_unix.cpp:88
#2  0x00007ffff53afc75 in QWaitCondition::wait (this=0x588f4a0, 
    mutex=0x588f498, time=18446744073709551615)
    at thread/qwaitcondition_unix.cpp:160
#3  0x00007ffff65dd42f in QFileInfoGatherer::run (this=0x588f488)
    at dialogs/qfileinfogatherer.cpp:214
#4  0x00007ffff53ae97f in QThreadPrivate::start (arg=0x588f488)
    at thread/qthread_unix.cpp:331
#5  0x00007ffff054eefc in start_thread ()
   from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x00007ffff78d589d in clone () from /lib/x86_64-linux-gnu/libc.so.6
#7  0x0000000000000000 in ?? ()

Thread 6 (Thread 0x7fffc4ec3700 (LWP 2475)):
#0  0x00007ffff055304c in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007ffff53afecb in QWaitConditionPrivate::wait (this=0x4369300, 
    time=18446744073709551615) at thread/qwaitcondition_unix.cpp:88
#2  0x00007ffff53afc75 in QWaitCondition::wait (this=0x403db18, 
    mutex=0x403db10, time=18446744073709551615)
---Type <return> to continue, or q <return> to quit---
    at thread/qwaitcondition_unix.cpp:160
#3  0x00007ffff53ab2e1 in QSemaphore::tryAcquire (this=0x4368e90, n=1, 
    timeout=-1) at thread/qsemaphore.cpp:221
#4  0x00007fffd99ae7bc in KisTileDataSwapper::waitForWork (this=0x43689f8)
    at /build/buildd/project-neon-calligra-2+git20111122+r72996/krita/image/tiles3/swap/kis_tile_data_swapper.cpp:86
#5  0x00007fffd99ae7d6 in KisTileDataSwapper::run (this=0x43689f8)
    at /build/buildd/project-neon-calligra-2+git20111122+r72996/krita/image/tiles3/swap/kis_tile_data_swapper.cpp:92
#6  0x00007ffff53ae97f in QThreadPrivate::start (arg=0x43689f8)
    at thread/qthread_unix.cpp:331
#7  0x00007ffff054eefc in start_thread ()
   from /lib/x86_64-linux-gnu/libpthread.so.0
#8  0x00007ffff78d589d in clone () from /lib/x86_64-linux-gnu/libc.so.6
#9  0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7fffe038f700 (LWP 2474)):
#0  0x00007ffff055304c in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007ffff53afecb in QWaitConditionPrivate::wait (this=0x4368e20, 
    time=18446744073709551615) at thread/qwaitcondition_unix.cpp:88
#2  0x00007ffff53afc75 in QWaitCondition::wait (this=0x40a80f8, 
    mutex=0x40a80f0, time=18446744073709551615)
---Type <return> to continue, or q <return> to quit---
    at thread/qwaitcondition_unix.cpp:160
#3  0x00007ffff53ab072 in QSemaphore::acquire (this=0x43689d0, n=1)
    at thread/qsemaphore.cpp:144
#4  0x00007fffd998e3e4 in KisTileDataPooler::waitForWork (this=0x43689c0)
    at /build/buildd/project-neon-calligra-2+git20111122+r72996/krita/image/tiles3/kis_tile_data_pooler.cc:162
#5  0x00007fffd998e473 in KisTileDataPooler::run (this=0x43689c0)
    at /build/buildd/project-neon-calligra-2+git20111122+r72996/krita/image/tiles3/kis_tile_data_pooler.cc:184
#6  0x00007ffff53ae97f in QThreadPrivate::start (arg=0x43689c0)
    at thread/qthread_unix.cpp:331
#7  0x00007ffff054eefc in start_thread ()
   from /lib/x86_64-linux-gnu/libpthread.so.0
#8  0x00007ffff78d589d in clone () from /lib/x86_64-linux-gnu/libc.so.6
#9  0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7fffc592a700 (LWP 2468)):
#0  0x00007ffff78ce913 in select () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007ffff5500095 in qt_safe_select (nfds=30, fdread=0x41ac860, 
    fdwrite=0x41acaf8, fdexcept=0x41acd90, orig_timeout=0x0)
    at kernel/qcore_unix.cpp:82
#2  0x00007ffff550723a in QEventDispatcherUNIX::select (this=0x41a0d70, 
    nfds=30, readfds=0x41ac860, writefds=0x41acaf8, exceptfds=0x41acd90, 
---Type <return> to continue, or q <return> to quit---
    timeout=0x0) at kernel/qeventdispatcher_unix.cpp:631
#3  0x00007ffff5505d57 in QEventDispatcherUNIXPrivate::doSelect (
    this=0x41ac6a0, flags=..., timeout=0x0)
    at kernel/qeventdispatcher_unix.cpp:219
#4  0x00007ffff55081da in QEventDispatcherUNIX::processEvents (this=0x41a0d70, 
    flags=...) at kernel/qeventdispatcher_unix.cpp:918
#5  0x00007ffff54c8ed4 in QEventLoop::processEvents (this=0x7fffc5929d50, 
    flags=...) at kernel/qeventloop.cpp:149
#6  0x00007ffff54c9028 in QEventLoop::exec (this=0x7fffc5929d50, flags=...)
    at kernel/qeventloop.cpp:201
#7  0x00007ffff53ac15b in QThread::exec (this=0x41a4160)
    at thread/qthread.cpp:498
#8  0x00007ffff54a8057 in QInotifyFileSystemWatcherEngine::run (this=0x41a4160)
    at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007ffff53ae97f in QThreadPrivate::start (arg=0x41a4160)
    at thread/qthread_unix.cpp:331
#10 0x00007ffff054eefc in start_thread ()
   from /lib/x86_64-linux-gnu/libpthread.so.0
#11 0x00007ffff78d589d in clone () from /lib/x86_64-linux-gnu/libc.so.6
#12 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7fffdfb8e700 (LWP 2467)):
#0  0x00007ffff78c9773 in poll () from /lib/x86_64-linux-gnu/libc.so.6
---Type <return> to continue, or q <return> to quit---
#1  0x00007ffff005ff68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ffff0060792 in g_main_loop_run ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fffe7b18516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007ffff00852b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007ffff054eefc in start_thread ()
   from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x00007ffff78d589d in clone () from /lib/x86_64-linux-gnu/libc.so.6
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7ffff7fab7a0 (LWP 2463)):
#0  0x00007ffff53a9227 in QReadWriteLock::lockForRead (this=0xcfbae38)
    at thread/qreadwritelock.cpp:152
#1  0x00007fffd998a24e in KisTileData::blockSwapping (this=0xcfbae00)
    at /build/buildd/project-neon-calligra-2+git20111122+r72996/krita/image/tiles3/kis_tile_data.h:92
#2  0x00007fffd998a5b4 in KisTile::blockSwapping (this=0x42515b0)
    at /build/buildd/project-neon-calligra-2+git20111122+r72996/krita/image/tiles3/kis_tile.cc:125
#3  0x00007fffd9989c24 in KisTile::lockForRead (this=0x42515b0)
    at /build/buildd/project-neon-calligra-2+git20111122+r72996/krita/image/tiles3/kis_tile.cc:163
#4  0x00007fffd99a8b14 in KisTiledRandomAccessor::lockTile (this=0xb6a5fe0, 
---Type <return> to continue, or q <return> to quit---
    tile=...)
    at /build/buildd/project-neon-calligra-2+git20111122+r72996/krita/image/tiles3/kis_tiled_random_accessor.h:52
#5  0x00007fffd99a899a in KisTiledRandomAccessor::fetchTileData (
    this=0xb6a5fe0, col=15, row=3)
    at /build/buildd/project-neon-calligra-2+git20111122+r72996/krita/image/tiles3/kis_tiled_random_accessor.cc:117
#6  0x00007fffd99a8847 in KisTiledRandomAccessor::moveTo (this=0xb6a5fe0, 
    x=968, y=225)
    at /build/buildd/project-neon-calligra-2+git20111122+r72996/krita/image/tiles3/kis_tiled_random_accessor.cc:89
#7  0x00007fffd9aa511f in KisRandomConstAccessor::moveTo (this=0x7fffffffd090, 
    x=968, y=225)
    at /build/buildd/project-neon-calligra-2+git20111122+r72996/krita/image/kis_random_accessor.cpp:66
#8  0x00007fffd99c35ac in KisRandomAccessorPixelBase<KisRandomConstAccessor, unsigned char const*>::moveTo (this=0x7fffffffd090, x=968, y=225)
    at /build/buildd/project-neon-calligra-2+git20111122+r72996/krita/image/kis_random_accessor.h:167
#9  0x00007fffd9a7d343 in KisPaintDevice::createThumbnailDevice (
    this=0x42fee10, w=32, h=17, selection=0x0, rect=...)
    at /build/buildd/project-neon-calligra-2+git20111122+r72996/krita/image/kis_paint_device.cc:765
---Type <return> to continue, or q <return> to quit---
#10 0x00007fffd9a7d4ca in KisPaintDevice::createThumbnail (this=0x42fee10, 
    w=32, h=32, selection=0x0, rect=...)
    at /build/buildd/project-neon-calligra-2+git20111122+r72996/krita/image/kis_paint_device.cc:777
#11 0x00007fffd9a82be1 in PaintDeviceCache::createThumbnail (this=0x42a1360, 
    w=32, h=32)
    at /build/buildd/project-neon-calligra-2+git20111122+r72996/krita/image/kis_paint_device.cc:132
#12 0x00007fffd9a7d5bc in KisPaintDevice::createThumbnail (this=0x42fee10, 
    w=32, h=32)
    at /build/buildd/project-neon-calligra-2+git20111122+r72996/krita/image/kis_paint_device.cc:784
#13 0x00007fffc9be7854 in KisUndoModel::addImage (this=0x59dcc50, idx=10)
    at /build/buildd/project-neon-calligra-2+git20111122+r72996/krita/plugins/extensions/dockers/historydocker/KisUndoModel.cpp:237
#14 0x00007fffc9be471f in KisUndoModel::qt_metacall (this=0x59dcc50, 
    _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0xb662370)
    at /build/buildd/project-neon-calligra-2+git20111122+r72996/obj-x86_64-linux-gnu/krita/plugins/extensions/dockers/historydocker/moc_KisUndoModel.cpp:80
#15 0x00007ffff54d34e8 in QMetaObject::metacall (object=0x59dcc50, 
    cl=QMetaObject::InvokeMetaMethod, idx=25, argv=0xb662370)
    at kernel/qmetaobject.cpp:237
#16 0x00007ffff54e2a70 in QMetaCallEvent::placeMetaCall (this=0xc817240, 
---Type <return> to continue, or q <return> to quit---
    object=0x59dcc50) at kernel/qobject.cpp:535
#17 0x00007ffff54e3cec in QObject::event (this=0x59dcc50, e=0xc817240)
    at kernel/qobject.cpp:1217
#18 0x00007ffff5f853b8 in QApplicationPrivate::notify_helper (this=0x6784f0, 
    receiver=0x59dcc50, e=0xc817240) at kernel/qapplication.cpp:4509
#19 0x00007ffff5f829d6 in QApplication::notify (this=0x7fffffffe0a0, 
    receiver=0x59dcc50, e=0xc817240) at kernel/qapplication.cpp:3909
#20 0x00007ffff6f4e8bf in KApplication::notify (this=0x7fffffffe0a0, 
    receiver=0x59dcc50, event=0xc817240)
    at /build/buildd/project-neon-kdelibs-2+git20111223+r92319/kdeui/kernel/kapplication.cpp:311
#21 0x00007ffff54cb30e in QCoreApplication::notifyInternal (this=
    0x7fffffffe0a0, receiver=0x59dcc50, event=0xc817240)
    at kernel/qcoreapplication.cpp:787
#22 0x00007ffff54cf091 in QCoreApplication::sendEvent (receiver=0x59dcc50, 
    event=0xc817240)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#23 0x00007ffff54cc532 in QCoreApplicationPrivate::sendPostedEvents (
    receiver=0x0, event_type=0, data=0x6028b0)
    at kernel/qcoreapplication.cpp:1428
#24 0x00007ffff5508091 in QEventDispatcherUNIX::processEvents (this=0x603fa0, 
    flags=...) at kernel/qeventdispatcher_unix.cpp:890
#25 0x00007ffff605e5ad in QEventDispatcherX11::processEvents (this=0x603fa0, 
---Type <return> to continue, or q <return> to quit---
    flags=...) at kernel/qeventdispatcher_x11.cpp:152
#26 0x00007ffff54c8ed4 in QEventLoop::processEvents (this=0x7fffffffe030, 
    flags=...) at kernel/qeventloop.cpp:149
#27 0x00007ffff54c9028 in QEventLoop::exec (this=0x7fffffffe030, flags=...)
    at kernel/qeventloop.cpp:201
#28 0x00007ffff54cba00 in QCoreApplication::exec ()
    at kernel/qcoreapplication.cpp:1064
#29 0x00007ffff5f8254e in QApplication::exec () at kernel/qapplication.cpp:3783
#30 0x00007ffff7b9976a in kdemain (argc=1, argv=0x7fffffffe2a8)
    at /build/buildd/project-neon-calligra-2+git20111122+r72996/krita/main.cc:71
#31 0x0000000000400786 in main (argc=1, argv=0x7fffffffe2a8)
    at /build/buildd/project-neon-calligra-2+git20111122+r72996/obj-x86_64-linux-gnu/krita/krita_dummy.cpp:3