Application: plasma-desktop (0.4)
KDE Platform Version: 4.6.00 (4.6.0) (Compiled from sources)
Qt Version: 4.7.0
Operating System: Linux 2.6.35-27-generic x86_64
Distribution: Ubuntu 10.10

-- Information about the crash:
When I was expanding a group of three elements (firefox windows) the plasma part crashed

-- Backtrace:
Application: Shell del desktop di Plasma (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fc56a0cc7a0 (LWP 29947))]

Thread 13 (Thread 0x7fc540f82700 (LWP 29951)):
#0  0x00007fc5699d1203 in __poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fc55e78f009 in g_main_context_poll (context=0x1cd3620, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>) at /build/buildd/glib2.0-2.26.1/glib/gmain.c:3093
#2  g_main_context_iterate (context=0x1cd3620, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>) at /build/buildd/glib2.0-2.26.1/glib/gmain.c:2775
#3  0x00007fc55e78f45c in g_main_context_iteration (context=0x1cd3620, may_block=1) at /build/buildd/glib2.0-2.26.1/glib/gmain.c:2843
#4  0x00007fc566d521e6 in QEventDispatcherGlib::processEvents (this=0x1cb8ed0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:417
#5  0x00007fc566d24a02 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#6  0x00007fc566d24dec in QEventLoop::exec (this=0x7fc540f81cb0, flags=) at kernel/qeventloop.cpp:201
#7  0x00007fc566c2f2fd in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:490
#8  0x00007fc566d045f8 in QInotifyFileSystemWatcherEngine::run (this=0x1cd23e0) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007fc566c3227e in QThreadPrivate::start (arg=0x1cd23e0) at thread/qthread_unix.cpp:266
#10 0x00007fc561fbf953 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#11 0x00007fc55ee41971 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#12 0x00007fc5699dd92d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 12 (Thread 0x7fc53ae57700 (LWP 29952)):
#0  0x00007fc55ee43665 in __pthread_mutex_lock (mutex=0x1e62488) at pthread_mutex_lock.c:61
#1  0x00007fc55e78ea43 in g_main_context_prepare (context=0x1e62480, priority=<value optimized out>) at /build/buildd/glib2.0-2.26.1/glib/gmain.c:2471
#2  0x00007fc55e78ee78 in g_main_context_iterate (context=0x1e62480, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>) at /build/buildd/glib2.0-2.26.1/glib/gmain.c:2760
#3  0x00007fc55e78f45c in g_main_context_iteration (context=0x1e62480, may_block=1) at /build/buildd/glib2.0-2.26.1/glib/gmain.c:2843
#4  0x00007fc566d521e6 in QEventDispatcherGlib::processEvents (this=0x1e655d0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:417
#5  0x00007fc566d24a02 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#6  0x00007fc566d24dec in QEventLoop::exec (this=0x7fc53ae56cb0, flags=) at kernel/qeventloop.cpp:201
#7  0x00007fc566c2f2fd in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:490
#8  0x00007fc566d045f8 in QInotifyFileSystemWatcherEngine::run (this=0x1dbd600) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007fc566c3227e in QThreadPrivate::start (arg=0x1dbd600) at thread/qthread_unix.cpp:266
#10 0x00007fc561fbf953 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#11 0x00007fc55ee41971 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#12 0x00007fc5699dd92d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 11 (Thread 0x7fc53a43d700 (LWP 6805)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fc566c32e3b in wait (this=<value optimized out>, mutex=0x21e2a60, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0x21e2a60, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fc562fbdd64 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x21d1770, th=0x25eb240) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fc562fc0f6b in ThreadWeaver::WorkingHardState::applyForWork (this=0x21d6120, th=0x25eb240) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fc562fbf4df in ThreadWeaver::ThreadRunHelper::run (this=0x7fc53a43cd00, parent=0x21d1770, th=0x25eb240) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007fc562fbfa38 in ThreadWeaver::Thread::run (this=0x25eb240) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007fc566c3227e in QThreadPrivate::start (arg=0x25eb240) at thread/qthread_unix.cpp:266
#8  0x00007fc561fbf953 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#9  0x00007fc55ee41971 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#10 0x00007fc5699dd92d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 10 (Thread 0x7fc536e9d700 (LWP 6806)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fc566c32e3b in wait (this=<value optimized out>, mutex=0x21e2a60, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0x21e2a60, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fc562fbdd64 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x21d1770, th=0x7fc53c0037b0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fc562fc0f6b in ThreadWeaver::WorkingHardState::applyForWork (this=0x21d6120, th=0x7fc53c0037b0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fc562fc0f84 in ThreadWeaver::WorkingHardState::applyForWork (this=0x21d6120, th=0x7fc53c0037b0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#6  0x00007fc562fc0f84 in ThreadWeaver::WorkingHardState::applyForWork (this=0x21d6120, th=0x7fc53c0037b0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#7  0x00007fc562fbf4df in ThreadWeaver::ThreadRunHelper::run (this=0x7fc536e9cd00, parent=0x21d1770, th=0x7fc53c0037b0) at ../../../threadweaver/Weaver/Thread.cpp:87
#8  0x00007fc562fbfa38 in ThreadWeaver::Thread::run (this=0x7fc53c0037b0) at ../../../threadweaver/Weaver/Thread.cpp:142
#9  0x00007fc566c3227e in QThreadPrivate::start (arg=0x7fc53c0037b0) at thread/qthread_unix.cpp:266
#10 0x00007fc561fbf953 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#11 0x00007fc55ee41971 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#12 0x00007fc5699dd92d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 9 (Thread 0x7fc52c9bb700 (LWP 6807)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fc566c32e3b in wait (this=<value optimized out>, mutex=0x21e2a60, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0x21e2a60, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fc562fbdd64 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x21d1770, th=0x2e42b30) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fc562fc0f6b in ThreadWeaver::WorkingHardState::applyForWork (this=0x21d6120, th=0x2e42b30) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fc562fc0f84 in ThreadWeaver::WorkingHardState::applyForWork (this=0x21d6120, th=0x2e42b30) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#6  0x00007fc562fc0f84 in ThreadWeaver::WorkingHardState::applyForWork (this=0x21d6120, th=0x2e42b30) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#7  0x00007fc562fbf4df in ThreadWeaver::ThreadRunHelper::run (this=0x7fc52c9bad00, parent=0x21d1770, th=0x2e42b30) at ../../../threadweaver/Weaver/Thread.cpp:87
#8  0x00007fc562fbfa38 in ThreadWeaver::Thread::run (this=0x2e42b30) at ../../../threadweaver/Weaver/Thread.cpp:142
#9  0x00007fc566c3227e in QThreadPrivate::start (arg=0x2e42b30) at thread/qthread_unix.cpp:266
#10 0x00007fc561fbf953 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#11 0x00007fc55ee41971 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#12 0x00007fc5699dd92d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 8 (Thread 0x7fc52c1ba700 (LWP 6808)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fc566c32e3b in wait (this=<value optimized out>, mutex=0x21e2a60, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0x21e2a60, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fc562fbdd64 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x21d1770, th=0x7fc53c0027f0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fc562fc0f6b in ThreadWeaver::WorkingHardState::applyForWork (this=0x21d6120, th=0x7fc53c0027f0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fc562fbf4df in ThreadWeaver::ThreadRunHelper::run (this=0x7fc52c1b9d00, parent=0x21d1770, th=0x7fc53c0027f0) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007fc562fbfa38 in ThreadWeaver::Thread::run (this=0x7fc53c0027f0) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007fc566c3227e in QThreadPrivate::start (arg=0x7fc53c0027f0) at thread/qthread_unix.cpp:266
#8  0x00007fc561fbf953 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#9  0x00007fc55ee41971 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#10 0x00007fc5699dd92d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 7 (Thread 0x7fc52b9b9700 (LWP 6809)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fc566c32e3b in wait (this=<value optimized out>, mutex=0x21e2a60, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0x21e2a60, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fc562fbdd64 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x21d1770, th=0x7fc524002040) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fc562fc0f6b in ThreadWeaver::WorkingHardState::applyForWork (this=0x21d6120, th=0x7fc524002040) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fc562fc0f84 in ThreadWeaver::WorkingHardState::applyForWork (this=0x21d6120, th=0x7fc524002040) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#6  0x00007fc562fc0f84 in ThreadWeaver::WorkingHardState::applyForWork (this=0x21d6120, th=0x7fc524002040) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#7  0x00007fc562fc0f84 in ThreadWeaver::WorkingHardState::applyForWork (this=0x21d6120, th=0x7fc524002040) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#8  0x00007fc562fbf4df in ThreadWeaver::ThreadRunHelper::run (this=0x7fc52b9b8d00, parent=0x21d1770, th=0x7fc524002040) at ../../../threadweaver/Weaver/Thread.cpp:87
#9  0x00007fc562fbfa38 in ThreadWeaver::Thread::run (this=0x7fc524002040) at ../../../threadweaver/Weaver/Thread.cpp:142
#10 0x00007fc566c3227e in QThreadPrivate::start (arg=0x7fc524002040) at thread/qthread_unix.cpp:266
#11 0x00007fc561fbf953 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#12 0x00007fc55ee41971 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#13 0x00007fc5699dd92d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#14 0x0000000000000000 in ?? ()

Thread 6 (Thread 0x7fc52af47700 (LWP 6810)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fc566c32e3b in wait (this=<value optimized out>, mutex=0x21e2a60, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0x21e2a60, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fc562fbdd64 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x21d1770, th=0x2e3bdb0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fc562fc0f6b in ThreadWeaver::WorkingHardState::applyForWork (this=0x21d6120, th=0x2e3bdb0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fc562fbf4df in ThreadWeaver::ThreadRunHelper::run (this=0x7fc52af46d00, parent=0x21d1770, th=0x2e3bdb0) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007fc562fbfa38 in ThreadWeaver::Thread::run (this=0x2e3bdb0) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007fc566c3227e in QThreadPrivate::start (arg=0x2e3bdb0) at thread/qthread_unix.cpp:266
#8  0x00007fc561fbf953 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#9  0x00007fc55ee41971 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#10 0x00007fc5699dd92d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7fc52a746700 (LWP 6811)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fc566c32e3b in wait (this=<value optimized out>, mutex=0x21e2a60, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0x21e2a60, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fc562fbdd64 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x21d1770, th=0x2b99790) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fc562fc0f6b in ThreadWeaver::WorkingHardState::applyForWork (this=0x21d6120, th=0x2b99790) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fc562fbf4df in ThreadWeaver::ThreadRunHelper::run (this=0x7fc52a745d00, parent=0x21d1770, th=0x2b99790) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007fc562fbfa38 in ThreadWeaver::Thread::run (this=0x2b99790) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007fc566c3227e in QThreadPrivate::start (arg=0x2b99790) at thread/qthread_unix.cpp:266
#8  0x00007fc561fbf953 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#9  0x00007fc55ee41971 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#10 0x00007fc5699dd92d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7fc529f45700 (LWP 6812)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fc566c32e3b in wait (this=<value optimized out>, mutex=0x21e2a60, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0x21e2a60, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fc562fbdd64 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x21d1770, th=0x2eab050) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fc562fc0f6b in ThreadWeaver::WorkingHardState::applyForWork (this=0x21d6120, th=0x2eab050) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fc562fbf4df in ThreadWeaver::ThreadRunHelper::run (this=0x7fc529f44d00, parent=0x21d1770, th=0x2eab050) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007fc562fbfa38 in ThreadWeaver::Thread::run (this=0x2eab050) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007fc566c3227e in QThreadPrivate::start (arg=0x2eab050) at thread/qthread_unix.cpp:266
#8  0x00007fc561fbf953 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#9  0x00007fc55ee41971 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#10 0x00007fc5699dd92d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7fc529744700 (LWP 6813)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fc566c32e3b in wait (this=<value optimized out>, mutex=0x21e2a60, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0x21e2a60, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fc562fbdd64 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x21d1770, th=0x2f71cb0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fc562fc0f6b in ThreadWeaver::WorkingHardState::applyForWork (this=0x21d6120, th=0x2f71cb0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fc562fbf4df in ThreadWeaver::ThreadRunHelper::run (this=0x7fc529743d00, parent=0x21d1770, th=0x2f71cb0) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007fc562fbfa38 in ThreadWeaver::Thread::run (this=0x2f71cb0) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007fc566c3227e in QThreadPrivate::start (arg=0x2f71cb0) at thread/qthread_unix.cpp:266
#8  0x00007fc561fbf953 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#9  0x00007fc55ee41971 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#10 0x00007fc5699dd92d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fc528f43700 (LWP 6814)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fc566c32e3b in wait (this=<value optimized out>, mutex=0x21e2a60, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0x21e2a60, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fc562fbdd64 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x21d1770, th=0x7fc53c000a50) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fc562fc0f6b in ThreadWeaver::WorkingHardState::applyForWork (this=0x21d6120, th=0x7fc53c000a50) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fc562fbf4df in ThreadWeaver::ThreadRunHelper::run (this=0x7fc528f42d00, parent=0x21d1770, th=0x7fc53c000a50) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007fc562fbfa38 in ThreadWeaver::Thread::run (this=0x7fc53c000a50) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007fc566c3227e in QThreadPrivate::start (arg=0x7fc53c000a50) at thread/qthread_unix.cpp:266
#8  0x00007fc561fbf953 in ?? () from /usr/lib/nvidia-current/libGL.so.1
#9  0x00007fc55ee41971 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#10 0x00007fc5699dd92d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fc56a0cc7a0 (LWP 29947)):
[KCrash Handler]
#6  QGraphicsLayoutItemPrivate::setSize (this=0x0, which=Qt::PreferredSize, size=...) at graphicsview/qgraphicslayoutitem.cpp:231
#7  0x00007fc54f468b20 in AbstractTaskItem::setPreferredOnscreenSize (this=0x38b7b30) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:150
#8  0x00007fc54f474229 in TaskGroupItem::updatePreferredSize (this=0x2e4dc60) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:934
#9  0x00007fc54f464d53 in TaskItemLayout::updatePreferredSize (this=0x47a6860) at ../../../../../plasma/desktop/applets/tasks/taskitemlayout.cpp:440
#10 0x00007fc54f46594d in TaskItemLayout::layoutItems (this=0x47a6860) at ../../../../../plasma/desktop/applets/tasks/taskitemlayout.cpp:417
#11 0x00007fc54f46e63b in TaskGroupItem::constraintsChanged (this=0x2e4dc60, constraints=) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:857
#12 0x00007fc54f4746b9 in TaskGroupItem::qt_metacall (this=0x2e4dc60, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffd81884a0) at ./taskgroupitem.moc:120
#13 0x00007fc566d3db27 in QMetaObject::activate (sender=0x14803e0, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x407600eb85a19bf6) at kernel/qobject.cpp:3280
#14 0x00007fc54f45ecb2 in Tasks::constraintsChanged (this=0x0, _t1=<value optimized out>) at ./tasks.moc:115
#15 0x00007fc54f45f073 in Tasks::constraintsEvent (this=0x14803e0, constraints=) at ../../../../../plasma/desktop/applets/tasks/tasks.cpp:301
#16 0x00007fc5694d0b6f in Plasma::Applet::flushPendingConstraintsEvents (this=0x14803e0) at ../../plasma/applet.cpp:1342
#17 0x00007fc5694d1875 in Plasma::Applet::timerEvent (this=0x14803e0, event=<value optimized out>) at ../../plasma/applet.cpp:2429
#18 0x00007fc566d378f9 in QObject::event (this=0x14803e0, e=0x1) at kernel/qobject.cpp:1183
#19 0x00007fc56670814b in QGraphicsWidget::event (this=0x14803e0, event=0x7fffd8188eb0) at graphicsview/qgraphicswidget.cpp:1405
#20 0x00007fc56608cfdc in QApplicationPrivate::notify_helper (this=0xeeceb0, receiver=0x14803e0, e=0x7fffd8188eb0) at kernel/qapplication.cpp:4396
#21 0x00007fc566092aed in QApplication::notify (this=0xed9d80, receiver=0x14803e0, e=0x7fffd8188eb0) at kernel/qapplication.cpp:4277
#22 0x00007fc567a2aa36 in KApplication::notify (this=0xed9d80, receiver=0x14803e0, event=0x7fffd8188eb0) at ../../kdeui/kernel/kapplication.cpp:311
#23 0x00007fc566d25cdc in QCoreApplication::notifyInternal (this=0xed9d80, receiver=0x14803e0, event=0x7fffd8188eb0) at kernel/qcoreapplication.cpp:732
#24 0x00007fc566d556f2 in sendEvent (this=0xef0750) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#25 QTimerInfoList::activateTimers (this=0xef0750) at kernel/qeventdispatcher_unix.cpp:602
#26 0x00007fc566d524a4 in timerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#27 0x00007fc55e78b342 in g_main_dispatch (context=0xeef520) at /build/buildd/glib2.0-2.26.1/glib/gmain.c:2149
#28 g_main_context_dispatch (context=0xeef520) at /build/buildd/glib2.0-2.26.1/glib/gmain.c:2702
#29 0x00007fc55e78f2a8 in g_main_context_iterate (context=0xeef520, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>) at /build/buildd/glib2.0-2.26.1/glib/gmain.c:2780
#30 0x00007fc55e78f45c in g_main_context_iteration (context=0xeef520, may_block=1) at /build/buildd/glib2.0-2.26.1/glib/gmain.c:2843
#31 0x00007fc566d52193 in QEventDispatcherGlib::processEvents (this=0xe57c20, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:415
#32 0x00007fc56613fa4e in QGuiEventDispatcherGlib::processEvents (this=0x0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#33 0x00007fc566d24a02 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#34 0x00007fc566d24dec in QEventLoop::exec (this=0x7fffd8189150, flags=) at kernel/qeventloop.cpp:201
#35 0x00007fc566d28ebb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1009
#36 0x00007fc569cbbd23 in kdemain (argc=<value optimized out>, argv=<value optimized out>) at ../../../../plasma/desktop/shell/main.cpp:118
#37 0x00007fc569915d8e in __libc_start_main (main=<value optimized out>, argc=<value optimized out>, ubp_av=<value optimized out>, init=<value optimized out>, fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=0x7fffd8189528) at libc-start.c:226
#38 0x0000000000400669 in _start ()

Reported using DrKonqi