Application: kontact (4.10.2)
KDE Platform Version: 4.10.2
Qt Version: 4.8.4
Operating System: Linux 3.8.0-19-generic x86_64
Distribution: Ubuntu 13.04

-- Information about the crash:
- What I was doing when the application crashed:
Kontact was running. After some period of inactivity, KDE blanked the screen. When I moved the mouse, screen came back, but Kontact crashed.

-- Backtrace:
Application: Kontact (kontact), signal: Aborted
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f91d01bc7c0 (LWP 2639))]

Thread 5 (Thread 0x7f91b1fdc700 (LWP 2646)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f91cc940585 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007f91cc9405d9 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007f91c7396f8e in start_thread (arg=0x7f91b1fdc700) at pthread_create.c:311
#4  0x00007f91cd738e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 4 (Thread 0x7f91717d9700 (LWP 2704)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f91cc686a09 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007f91cc96ecee in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007f91c7396f8e in start_thread (arg=0x7f91717d9700) at pthread_create.c:311
#4  0x00007f91cd738e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 3 (Thread 0x7f915f960700 (LWP 3254)):
#0  0x00007f91cd72c3cd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f91c6cd41dc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f91c6cd4304 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f91ceb5e036 in QEventDispatcherGlib::processEvents (this=0x7f91580008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f91ceb2e38f in QEventLoop::processEvents (this=this@entry=0x7f915f95fd90, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f91ceb2e618 in QEventLoop::exec (this=this@entry=0x7f915f95fd90, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f91cea30410 in QThread::exec (this=this@entry=0x1137600) at thread/qthread.cpp:542
#7  0x00007f91ceb0fedf in QInotifyFileSystemWatcherEngine::run (this=0x1137600) at io/qfilesystemwatcher_inotify.cpp:256
#8  0x00007f91cea32bec in QThreadPrivate::start (arg=0x1137600) at thread/qthread_unix.cpp:338
#9  0x00007f91c7396f8e in start_thread (arg=0x7f915f960700) at pthread_create.c:311
#10 0x00007f91cd738e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 2 (Thread 0x7f915e8d0700 (LWP 3261)):
[KCrash Handler]
#6  0x00007f91cd676037 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#7  0x00007f91cd679698 in __GI_abort () at abort.c:90
#8  0x00007f91cd6b35ab in __libc_message (do_abort=do_abort@entry=2, fmt=fmt@entry=0x7f91cd7c6860 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:199
#9  0x00007f91cd6bfa46 in malloc_printerr (ptr=0x1805290, str=0x7f91cd7c2852 "invalid fastbin entry (free)", action=3) at malloc.c:4902
#10 _int_free (av=<optimized out>, p=0x1805280, have_lock=0) at malloc.c:3758
#11 0x00007f91cea7c488 in QString::free (d=0x1805290) at tools/qstring.cpp:1235
#12 0x00007f91ca0acc89 in ~QString (this=0x293ac00, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qstring.h:880
#13 QDBusMessagePrivate::~QDBusMessagePrivate (this=0x293abe0, __in_chrg=<optimized out>) at qdbusmessage.cpp:72
#14 0x00007f91ca0acd9f in QDBusMessage::~QDBusMessage (this=0xa4f, __in_chrg=<optimized out>) at qdbusmessage.cpp:537
#15 0x00007f91ca0a88ad in ~QDBusCallDeliveryEvent (this=0x24a0e50, __in_chrg=<optimized out>) at qdbusintegrator_p.h:93
#16 QDBusCallDeliveryEvent::~QDBusCallDeliveryEvent (this=0x24a0e50, __in_chrg=<optimized out>) at qdbusintegrator_p.h:93
#17 0x00007f91ceb3317a in QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x1803170) at kernel/qcoreapplication.cpp:1586
#18 0x00007f91ceb334a3 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1463
#19 0x00007f91ceb5de83 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#20 postEventSourceDispatch (s=0x7f91500012d0) at kernel/qeventdispatcher_glib.cpp:279
#21 0x00007f91c6cd3f05 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f91c6cd4248 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f91c6cd4304 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f91ceb5e016 in QEventDispatcherGlib::processEvents (this=0x7f91500008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#25 0x00007f91ceb2e38f in QEventLoop::processEvents (this=this@entry=0x7f915e8cfdc0, flags=...) at kernel/qeventloop.cpp:149
#26 0x00007f91ceb2e618 in QEventLoop::exec (this=this@entry=0x7f915e8cfdc0, flags=...) at kernel/qeventloop.cpp:204
#27 0x00007f91cea30410 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#28 0x00007f91cea32bec in QThreadPrivate::start (arg=0xfa8620) at thread/qthread_unix.cpp:338
#29 0x00007f91c7396f8e in start_thread (arg=0x7f915e8d0700) at pthread_create.c:311
#30 0x00007f91cd738e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 1 (Thread 0x7f91d01bc7c0 (LWP 2639)):
#0  0x00007f91cd72ab0d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f91c6d126cf in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f91c6cd3d3c in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f91c6cd4175 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f91c6cd4304 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f91ceb5e036 in QEventDispatcherGlib::processEvents (this=0xd38b60, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007f91cdf7b1ae in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#7  0x00007f91ceb2e38f in QEventLoop::processEvents (this=this@entry=0x7fffe9f864b0, flags=...) at kernel/qeventloop.cpp:149
#8  0x00007f91ceb2e618 in QEventLoop::exec (this=this@entry=0x7fffe9f864b0, flags=...) at kernel/qeventloop.cpp:204
#9  0x00007f91ceb33cf6 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#10 0x00000000004033a9 in ?? ()
#11 0x00007f91cd660ea5 in __libc_start_main (main=0x402bb0, argc=3, ubp_av=0x7fffe9f86788, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffe9f86778) at libc-start.c:260
#12 0x00000000004038e1 in _start ()

Possible duplicates by query: bug 318507, bug 318426, bug 314682, bug 314447, bug 314055.

Reported using DrKonqi