.
Thread 4 (Thread 0xb29ffb40 (LWP 2546)):
#0  0xb7722cf9 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb5e0463f in poll () at ../sysdeps/unix/syscall-template.S:84
No locals.
#2  0xb7383c70 in poll (__timeout=-1, __nfds=1, __fds=0xb2000470) at /usr/include/i386-linux-gnu/bits/poll2.h:46
No locals.
#3  g_poll (fds=0xb2000470, nfds=1, timeout=-1) at ../../../../glib/gpoll.c:124
No locals.
#4  0xb73742fc in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0xb2000470, timeout=<optimized out>, context=0x8f3bd38) at ../../../../glib/gmain.c:4271
        poll_func = 0xb7383c50 <g_poll>
#5  g_main_context_iterate (context=context@entry=0x8f3bd38, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3967
        max_priority = 2147483647
        timeout = -1
        some_ready = <optimized out>
        nfds = 1
        allocated_nfds = <optimized out>
        fds = 0xb2000470
#6  0xb7374434 in g_main_context_iteration (context=0x8f3bd38, may_block=1) at ../../../../glib/gmain.c:4033
        retval = <optimized out>
#7  0xb7374490 in glib_worker_main (data=0x0) at ../../../../glib/gmain.c:5824
No locals.
#8  0xb739c2aa in g_thread_proxy (data=0x8f3be00) at ../../../../glib/gthread.c:784
        thread = 0x8f3be00
#9  0xb58c32f5 in start_thread (arg=0xb29ffb40) at pthread_create.c:456
        __res = <optimized out>
        pd = 0xb29ffb40
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {-1249021952, 0, 4001536, -1298140440, 2107168206, 1511637952}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#10 0xb5e0e6de in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:113
No locals.
.
Thread 3 (Thread 0xb1fffb40 (LWP 2547)):
#0  0xb7722cf9 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb5e0463f in poll () at ../sysdeps/unix/syscall-template.S:84
No locals.
#2  0xb7383c70 in poll (__timeout=-1, __nfds=2, __fds=0xb1602650) at /usr/include/i386-linux-gnu/bits/poll2.h:46
No locals.
#3  g_poll (fds=0xb1602650, nfds=2, timeout=-1) at ../../../../glib/gpoll.c:124
No locals.
#4  0xb73742fc in g_main_context_poll (priority=<optimized out>, n_fds=2, fds=0xb1602650, timeout=<optimized out>, context=0x8f41150) at ../../../../glib/gmain.c:4271
        poll_func = 0xb7383c50 <g_poll>
#5  g_main_context_iterate (context=0x8f41150, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3967
        max_priority = 2147483647
        timeout = -1
        some_ready = <optimized out>
        nfds = 2
        allocated_nfds = <optimized out>
        fds = 0xb1602650
#6  0xb7374719 in g_main_loop_run (loop=0x8f42a58) at ../../../../glib/gmain.c:4168
        __func__ = "g_main_loop_run"
#7  0xb757d085 in gdbus_shared_thread_func (user_data=0x8f3b7c8) at ../../../../gio/gdbusprivate.c:252
        data = 0x8f3b7c8
#8  0xb739c2aa in g_thread_proxy (data=0x8f3bf20) at ../../../../glib/gthread.c:784
        thread = 0x8f3bf20
#9  0xb58c32f5 in start_thread (arg=0xb1fffb40) at pthread_create.c:456
        __res = <optimized out>
        pd = 0xb1fffb40
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {-1249021952, 0, 4001536, -1308626200, -1114057272, 1511637952}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#10 0xb5e0e6de in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:113
No locals.
.
Thread 2 (Thread 0xb333ab40 (LWP 2545)):
#0  0xb7722cf9 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb5e0463f in poll () at ../sysdeps/unix/syscall-template.S:84
No locals.
#2  0xb7383c70 in poll (__timeout=-1, __nfds=2, __fds=0xb2a05ae8) at /usr/include/i386-linux-gnu/bits/poll2.h:46
No locals.
#3  g_poll (fds=0xb2a05ae8, nfds=2, timeout=-1) at ../../../../glib/gpoll.c:124
No locals.
#4  0xb73742fc in g_main_context_poll (priority=<optimized out>, n_fds=2, fds=0xb2a05ae8, timeout=<optimized out>, context=0xb2a004e0) at ../../../../glib/gmain.c:4271
        poll_func = 0xb7383c50 <g_poll>
#5  g_main_context_iterate (context=context@entry=0xb2a004e0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3967
        max_priority = 2147483647
        timeout = -1
        some_ready = <optimized out>
        nfds = 2
        allocated_nfds = <optimized out>
        fds = 0xb2a05ae8
#6  0xb7374434 in g_main_context_iteration (context=0xb2a004e0, may_block=1) at ../../../../glib/gmain.c:4033
        retval = <optimized out>
#7  0xb633f4a3 in QEventDispatcherGlib::processEvents (this=0xb2a00470, flags=...) at kernel/qeventdispatcher_glib.cpp:423
        d = 0xb2a00480
        canWait = <optimized out>
        savedFlags = {i = 0}
        result = <optimized out>
#8  0xb62e384d in QEventLoop::exec (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:212
        d = <optimized out>
        locker = {val = 150131472}
        ref = {d = <optimized out>, locker = @0xb333a114, exceptionCaught = true}
#9  0xb610ce95 in QThread::exec (this=0xb72db6c0 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:507
        d = 0x8f2d2d0
        locker = {val = 150131472}
        eventLoop = {<QObject> = {_vptr.QObject = 0xb655e290 <vtable for QEventLoop+8>, static staticMetaObject = {d = {superdata = 0x0, stringdata = 0xb6447a00 <qt_meta_stringdata_QObject>, data = 0xb64478e0 <qt_meta_data_QObject>, static_metacall = 0xb631c070 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0xb2a02910}, static staticQtMetaObject = {d = {superdata = 0x0, stringdata = 0xb6491a60 <qt_meta_stringdata_Qt>, data = 0xb648efa0 <qt_meta_data_Qt>, static_metacall = 0x0, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = 0xb6558f18 <QObject::staticMetaObject>, stringdata = 0xb64a48c0 <qt_meta_stringdata_QEventLoop>, data = 0xb64a4860 <qt_meta_data_QEventLoop>, static_metacall = 0xb63951e0 <QEventLoop::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}
        returnCode = <optimized out>
#10 0xb724896c in QDBusConnectionManager::run (this=0xb72db6c0 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:178
        locker = <optimized out>
#11 0xb611232a in QThreadPrivate::start (arg=<optimized out>) at thread/qthread_unix.cpp:368
        __clframe = {__cancel_routine = 0xb6111280 <QThreadPrivate::finish(void*)>, __cancel_arg = 0xb72db6c0 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>, __do_it = 1, __cancel_type = <optimized out>}
        thr = 0xb72db6c0 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>
        data = <optimized out>
#12 0xb58c32f5 in start_thread (arg=0xb333ab40) at pthread_create.c:456
        __res = <optimized out>
        pd = 0xb333ab40
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {-1249021952, 0, 4001536, -1288461592, 624481741, 1511637952}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#13 0xb5e0e6de in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:113
No locals.
.
Thread 1 (Thread 0xb372cf80 (LWP 2490)):
#0  0xb7748a74 in ?? ()
No symbol table info available.
Backtrace stopped: Cannot access memory at address 0x7