.
Thread 4 (Thread 0xb2affb40 (LWP 2280)):
#0  0xb770acf9 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb5de94ff in poll () at ../sysdeps/unix/syscall-template.S:84
No locals.
#2  0xb73681c0 in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0xb735874c in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#4  0xb7358884 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0xb73588e0 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#6  0xb73807aa in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#7  0xb58a82d5 in start_thread (arg=0xb2affb40) at pthread_create.c:333
        __res = <optimized out>
        pd = 0xb2affb40
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {-1249132544, 0, 4001536, -1297091864, -812165536, -2055864210}, 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"
#8  0xb5df359e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:113
No locals.
.
Thread 3 (Thread 0xb22feb40 (LWP 2281)):
#0  0xb770acf9 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb5de94ff in poll () at ../sysdeps/unix/syscall-template.S:84
No locals.
#2  0xb73681c0 in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0xb735874c in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#4  0xb7358b69 in g_main_loop_run () from /lib/i386-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0xb7561ed5 in ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
No symbol table info available.
#6  0xb73807aa in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#7  0xb58a82d5 in start_thread (arg=0xb22feb40) at pthread_create.c:333
        __res = <optimized out>
        pd = 0xb22feb40
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {-1249132544, 0, 4001536, -1305484568, -810068383, -2055864210}, 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"
#8  0xb5df359e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:113
No locals.
.
Thread 2 (Thread 0xb34cab40 (LWP 2279)):
#0  0xb770acf9 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb5de94ff in poll () at ../sysdeps/unix/syscall-template.S:84
No locals.
#2  0xb73681c0 in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0xb735874c in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#4  0xb7358884 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0xb63234a3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
No symbol table info available.
#6  0xb62c784d in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
No symbol table info available.
#7  0xb60f0e95 in QThread::exec() () from /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
No symbol table info available.
#8  0xb722c96c in ?? () from /usr/lib/i386-linux-gnu/libQt5DBus.so.5
No symbol table info available.
#9  0xb60f632a in ?? () from /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
No symbol table info available.
#10 0xb58a82d5 in start_thread (arg=0xb34cab40) at pthread_create.c:333
        __res = <optimized out>
        pd = 0xb34cab40
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {-1249132544, 0, 4001536, -1286823192, 154621539, -2055864210}, 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"
#11 0xb5df359e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:113
No locals.
.
Thread 1 (Thread 0xb3738ac0 (LWP 2278)):
#0  0xb7730a74 in ?? ()
No symbol table info available.
Backtrace stopped: Cannot access memory at address 0x7