.
Thread 2 (Thread 0xb477eb40 (LWP 1278)):
#0  0xb7791d05 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb6b8055f in poll () at ../sysdeps/unix/syscall-template.S:84
No locals.
#2  0xb745a170 in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0xb744a70c in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#4  0xb744a844 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0xb713a1f3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
No symbol table info available.
#6  0xb70dcdad in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
No symbol table info available.
#7  0xb6efed15 in QThread::exec() () from /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
No symbol table info available.
#8  0xb736d73c in ?? () from /usr/lib/i386-linux-gnu/libQt5DBus.so.5
No symbol table info available.
#9  0xb6f0442a in ?? () from /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
No symbol table info available.
#10 0xb6c61305 in start_thread (arg=0xb477eb40) at pthread_create.c:333
        __res = <optimised out>
        pd = 0xb477eb40
        now = <optimised out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {-1228451840, 0, 4001536, -1267211480, 22079700, 1655807697}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        pagesize_m1 = <optimised out>
        sp = <optimised out>
        freesize = <optimised out>
        __PRETTY_FUNCTION__ = "start_thread"
#11 0xb6b8a5fe in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:113
No locals.
.
Thread 1 (Thread 0xb4982800 (LWP 1262)):
#0  do_lookup_x (undef_name=0x0, new_hash=1, old_hash=0xbfaa21eb, ref=0x0, result=0x4cd, scope=0x70, i=3807944636, version=0xb779c529 <do_lookup_x+1689>, flags=5, skip=0x1, type_class=-1226319944, undef_map=0xd62) at dl-lookup.c:361
        n = <error reading variable n (Cannot access memory at address 0x74)>
        list = <optimised out>
#1  0x00000000 in ?? ()
No symbol table info available.