When I open recent conversations from chat window and search for any word, it crashes.

Reproducible: Always

Steps to Reproduce:
1. Open chat window of any contact.
2. Click previous conversations.
3. Enter any search string in search all logs textbox.
Actual Results:  
Crash

Expected Results:  
Filter logs as per search string.

Backtrace
-------------------

Application: KDE IM Log Viewer (ktp-log-viewer), signal: Segmentation fault
Using host libthread_db library "/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0xb29c8780 (LWP 9444))]

Thread 5 (Thread 0xb1836b40 (LWP 9445)):
#0  0xb7796424 in __kernel_vsyscall ()
#1  0xb41aea4c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0xb42b721c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libc.so.6
#3  0xb63aeb1d in ?? () from /usr/lib/libQtWebKit.so.4
#4  0xb63aeb4f in ?? () from /usr/lib/libQtWebKit.so.4
#5  0xb41aae32 in start_thread () from /lib/libpthread.so.0
#6  0xb42a98ee in clone () from /lib/libc.so.6

Thread 4 (Thread 0xb0f0db40 (LWP 9446)):
#0  0xb7796424 in __kernel_vsyscall ()
#1  0xb429e90b in poll () from /lib/libc.so.6
#2  0xb3c155eb in g_poll () from /usr/lib/libglib-2.0.so.0
#3  0xb3c06bb0 in ?? () from /usr/lib/libglib-2.0.so.0
#4  0xb3c06d11 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#5  0xb518532f in QEventDispatcherGlib::processEvents (this=0xb0500468, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0xb515204c in QEventLoop::processEvents (this=this@entry=0xb0f0d218, flags=...) at kernel/qeventloop.cpp:149
#7  0xb5152341 in QEventLoop::exec (this=0xb0f0d218, flags=...) at kernel/qeventloop.cpp:204
#8  0xb503da5c in QThread::exec (this=this@entry=0xa1682b0) at thread/qthread.cpp:501
#9  0xb503dbbb in QThread::run (this=0xa1682b0) at thread/qthread.cpp:568
#10 0xb5040e68 in QThreadPrivate::start (arg=0xa1682b0) at thread/qthread_unix.cpp:338
#11 0xb41aae32 in start_thread () from /lib/libpthread.so.0
#12 0xb42a98ee in clone () from /lib/libc.so.6

Thread 3 (Thread 0xb018fb40 (LWP 9447)):
#0  0xb7796424 in __kernel_vsyscall ()
#1  0xb429e90b in poll () from /lib/libc.so.6
#2  0xb3c155eb in g_poll () from /usr/lib/libglib-2.0.so.0
#3  0xb3c06bb0 in ?? () from /usr/lib/libglib-2.0.so.0
#4  0xb3c06d11 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#5  0xb0195d20 in dconf_gdbus_worker_thread () from /usr/lib/gio/modules/libdconfsettings.so
#6  0xb3c2c333 in ?? () from /usr/lib/libglib-2.0.so.0
#7  0xb41aae32 in start_thread () from /lib/libpthread.so.0
#8  0xb42a98ee in clone () from /lib/libc.so.6

Thread 2 (Thread 0xae7feb40 (LWP 9450)):
#0  0xb7796424 in __kernel_vsyscall ()
#1  0xb429e90b in poll () from /lib/libc.so.6
#2  0xb3c155eb in g_poll () from /usr/lib/libglib-2.0.so.0
#3  0xb3c06bb0 in ?? () from /usr/lib/libglib-2.0.so.0
#4  0xb3c0708b in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#5  0xb3ae23aa in gdbus_shared_thread_func () from /usr/lib/libgio-2.0.so.0
#6  0xb3c2c333 in ?? () from /usr/lib/libglib-2.0.so.0
#7  0xb41aae32 in start_thread () from /lib/libpthread.so.0
#8  0xb42a98ee in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb29c8780 (LWP 9444)):
[KCrash Handler]
#7  Tp::DBusProxy::objectPath (this=0x0) at /usr/src/debug/telepathy-qt-0.9.3/TelepathyQt/dbus-proxy.cpp:131
#8  0xb6c1d492 in Tp::Account::uniqueIdentifier (this=0x0) at /usr/src/debug/telepathy-qt-0.9.3/TelepathyQt/account.cpp:2080
#9  0x0a158680 in ?? ()
#10 0x0805f6d9 in ?? ()
#11 0x080550df in ?? ()
#12 0xb516b872 in QMetaObject::activate (sender=0xa625590, m=0xb6b7d97c <Tpl::PendingOperation::staticMetaObject>, local_signal_index=0, argv=0xbfbb1318) at kernel/qobject.cpp:3556
#13 0xb6b6b9d5 in Tpl::PendingOperation::finished (this=this@entry=0xa625590, _t1=_t1@entry=0xa625590) at /usr/src/debug/telepathy-logger-qt-0.5.1/build/TelepathyLoggerQt4/_gen/pending-operation.moc.hpp:111
#14 0xb6b6bf7f in Tpl::PendingOperation::emitFinished (this=this@entry=0xa625590) at /usr/src/debug/telepathy-logger-qt-0.5.1/TelepathyLoggerQt4/pending-operation.cpp:98
#15 0xb6b6db54 in qt_static_metacall (_a=0xa0f62b8, _id=4, _o=0xa625590, _c=<optimized out>) at /usr/src/debug/telepathy-logger-qt-0.5.1/build/TelepathyLoggerQt4/_gen/pending-operation.moc.hpp:62
#16 Tpl::PendingOperation::qt_static_metacall (_o=0xa625590, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0xa0f62b8) at /usr/src/debug/telepathy-logger-qt-0.5.1/build/TelepathyLoggerQt4/_gen/pending-operation.moc.hpp:52
#17 0xb51652fa in QMetaCallEvent::placeMetaCall (this=0xa4ee150, object=0xa625590) at kernel/qobject.cpp:525
#18 0xb516985b in QObject::event (this=0xa625590, e=0xa4ee150) at kernel/qobject.cpp:1204
#19 0xb45bdadc in QApplicationPrivate::notify_helper (this=0x9fe2f30, receiver=0xa625590, e=0xa4ee150) at kernel/qapplication.cpp:4557
#20 0xb45c24df in QApplication::notify (this=0xa4ee150, receiver=0xa625590, e=0xa4ee150) at kernel/qapplication.cpp:3939
#21 0xb724f6a1 in KApplication::notify (this=0xbfbb1b90, receiver=0xa625590, event=0xa4ee150) at /usr/src/debug/kdelibs-4.9.3/kdeui/kernel/kapplication.cpp:311
#22 0xb515357e in QCoreApplication::notifyInternal (this=0xbfbb1b90, receiver=0xa625590, event=0xa4ee150) at kernel/qcoreapplication.cpp:915
#23 0xb51572cd in sendEvent (event=<optimized out>, receiver=<optimized out>) at kernel/qcoreapplication.h:231
#24 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x9fbb370) at kernel/qcoreapplication.cpp:1539
#25 0xb515754c in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1432
#26 0xb5185194 in sendPostedEvents () at kernel/qcoreapplication.h:236
#27 postEventSourceDispatch (s=0x9fe3380) at kernel/qeventdispatcher_glib.cpp:279
#28 0xb3c06893 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#29 0xb3c06c30 in ?? () from /usr/lib/libglib-2.0.so.0
#30 0xb3c06d11 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#31 0xb5185311 in QEventDispatcherGlib::processEvents (this=0x9fbe9b8, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#32 0xb466f33a in QGuiEventDispatcherGlib::processEvents (this=0x9fbe9b8, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#33 0xb515204c in QEventLoop::processEvents (this=this@entry=0xbfbb1aa8, flags=...) at kernel/qeventloop.cpp:149
#34 0xb5152341 in QEventLoop::exec (this=0xbfbb1aa8, flags=...) at kernel/qeventloop.cpp:204
#35 0xb51575fa in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1187
#36 0xb45bb954 in QApplication::exec () at kernel/qapplication.cpp:3818
#37 0x0805376a in ?? ()
#38 0xb41d83d5 in __libc_start_main () from /lib/libc.so.6
#39 0x08053ad5 in _start ()