Application: kscreenlocker (2.0)
KDE Platform Version: 4.4.90 (KDE 4.4.90 (KDE 4.5 RC1))
Qt Version: 4.7.0
Operating System: Linux 2.6.34-020634-generic x86_64
Distribution: Ubuntu 10.04 LTS

-- Information about the crash:
- What I was doing when the application crashed:

Just called lock , it crashed after come back from screensaver

The crash can be reproduced every time.

-- Backtrace:
Application: KDE Screen Locker (kscreenlocker), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f8180ee07a0 (LWP 14121))]

Thread 3 (Thread 0x7f816ef6b710 (LWP 14122)):
#0  __lll_lock_wait_private () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:97
#1  0x00007f817d9693ac in _L_lock_12430 () from /lib/libc.so.6
#2  0x00007f817d967e48 in *__GI___libc_free (mem=0x7f817dc68e40) at malloc.c:3736
#3  0x00007f817b5cf89b in ?? () from /usr/lib/nvidia-current/tls/libnvidia-tls.so.256.35
#4  0x00007f817eff2edc in QScopedPointerDeleter<QObjectData>::cleanup (this=<value optimized out>, __in_chrg=<value optimized out>) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:62
#5  ~QScopedPointer (this=<value optimized out>, __in_chrg=<value optimized out>) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:100
#6  ~QObject (this=<value optimized out>, __in_chrg=<value optimized out>) at kernel/qobject.cpp:963
#7  0x00007f817f00660d in ~QEventDispatcherGlib (this=0x1e7b910, __in_chrg=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:391
#8  0x00007f817eee6994 in QThreadPrivate::finish (arg=<value optimized out>) at thread/qthread_unix.cpp:302
#9  0x00007f817eee7156 in ~__pthread_cleanup_class (arg=0x7f817f30af40) at /usr/include/pthread.h:535
#10 QThreadPrivate::start (arg=0x7f817f30af40) at thread/qthread_unix.cpp:271
#11 0x00007f817ec559ca in start_thread (arg=<value optimized out>) at pthread_create.c:300
#12 0x00007f817d9d06fd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f816ca0f710 (LWP 14130)):
#0  0x00007f817d9c3f83 in *__GI___poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f8178cd74a9 in ?? () from /lib/libglib-2.0.so.0
#2  0x00007f8178cd78fc in g_main_context_iteration () from /lib/libglib-2.0.so.0
#3  0x00007f817f0059c6 in QEventDispatcherGlib::processEvents (this=0x202f3e0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:414
#4  0x00007f817efd85b2 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#5  0x00007f817efd898c in QEventLoop::exec (this=0x7f816ca0ed70, flags=) at kernel/qeventloop.cpp:201
#6  0x00007f817eee41cd in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:490
#7  0x00007f817efb84d8 in QInotifyFileSystemWatcherEngine::run (this=0x20e8f70) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f817eee714e in QThreadPrivate::start (arg=0x20e8f70) at thread/qthread_unix.cpp:266
#9  0x00007f817ec559ca in start_thread (arg=<value optimized out>) at pthread_create.c:300
#10 0x00007f817d9d06fd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f8180ee07a0 (LWP 14121)):
[KCrash Handler]
#6  malloc_consolidate (av=0x7f817dc68e40) at malloc.c:5136
#7  0x00007f817d964460 in _int_free (av=0x7f817dc68e40, p=0x1f399e0) at malloc.c:5015
#8  0x00007f817d967e53 in *__GI___libc_free (mem=<value optimized out>) at malloc.c:3738
#9  0x00007f817b5cf89b in ?? () from /usr/lib/nvidia-current/tls/libnvidia-tls.so.256.35
#10 0x00007f817ef49119 in Free_MarkMarkPos (st=0x1ef7e50, lookup_type=0) at ../3rdparty/harfbuzz/src/harfbuzz-gpos.c:2904
#11 _HB_GPOS_Free_SubTable (st=0x1ef7e50, lookup_type=0) at ../3rdparty/harfbuzz/src/harfbuzz-gpos.c:5824
#12 0x00007f817ef50724 in Free_SubTable (l=0x1eec5d0, type=HB_Type_GPOS) at ../3rdparty/harfbuzz/src/harfbuzz-open.c:469
#13 Free_Lookup (l=0x1eec5d0, type=HB_Type_GPOS) at ../3rdparty/harfbuzz/src/harfbuzz-open.c:568
#14 0x00007f817ef507b6 in _HB_OPEN_Free_LookupList (ll=<value optimized out>, type=HB_Type_GPOS) at ../3rdparty/harfbuzz/src/harfbuzz-open.c:655
#15 0x00007f817ef4ea62 in HB_Done_GPOS_Table (gpos=0x1eac730) at ../3rdparty/harfbuzz/src/harfbuzz-gpos.c:175
#16 0x00007f817ef52347 in HB_FreeFace (face=0x1eb99d0) at ../3rdparty/harfbuzz/src/harfbuzz-shaper.cpp:1028
#17 0x00007f817e448d91 in QFreetypeFace::release (this=0x1f1d8f0, face_id=...) at text/qfontengine_ft.cpp:316
#18 0x00007f817e44ce5f in ~QFontEngineFT (this=0x1f18710, __in_chrg=<value optimized out>) at text/qfontengine_ft.cpp:643
#19 0x00007f817e440513 in ~QFontEngineX11FT (this=0x1f18710, __in_chrg=<value optimized out>) at text/qfontengine_x11.cpp:1126
#20 0x00007f817e382737 in ~QFontEngineMulti (this=0x1ebeb70, __in_chrg=<value optimized out>) at text/qfontengine.cpp:1282
#21 0x00007f817e4458ba in ~QFontEngineMultiFT (this=0x1ebeb70, __in_chrg=<value optimized out>) at text/qfontengine_x11.cpp:902
#22 0x00007f817e377352 in QFontCache::clear (this=0x1eaa350) at text/qfont.cpp:2695
#23 0x00007f817e37be9a in ~QFontCache (this=0x7f817dc68e40, __in_chrg=<value optimized out>) at text/qfont.cpp:2635
#24 0x00007f817eee5af2 in QThreadStorageData::set (this=<value optimized out>, p=0x0) at thread/qthreadstorage.cpp:148
#25 0x00007f817e1c269a in qt_cleanup () at kernel/qapplication_x11.cpp:2596
#26 0x00007f817e1533a7 in ~QApplication (this=0x7fffe1e3c960, __in_chrg=<value optimized out>) at kernel/qapplication.cpp:1110
#27 0x000000000041f9c5 in ~MyApp (argc=<value optimized out>, argv=<value optimized out>) at ../../../krunner/lock/main.h:27
#28 main (argc=<value optimized out>, argv=<value optimized out>) at ../../../krunner/lock/main.cc:173

Possible duplicates by query: bug 243067.

Reported using DrKonqi