.
Thread 2 (Thread 0xb459cb40 (LWP 8504)):
#0  0xb773ccf9 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb6b0b4ff in poll () at ../sysdeps/unix/syscall-template.S:84
No locals.
#2  0xb73de200 in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0xb73ce79c in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#4  0xb73ce8d4 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0xb70bc4a3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
No symbol table info available.
#6  0xb706084d in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
No symbol table info available.
#7  0xb6e89e95 in QThread::exec() () from /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
No symbol table info available.
#8  0xb72f396c in ?? () from /usr/lib/i386-linux-gnu/libQt5DBus.so.5
No symbol table info available.
#9  0xb6e8f32a in ?? () from /usr/lib/i386-linux-gnu/sse2/libQt5Core.so.5
No symbol table info available.
#10 0xb6de52d5 in start_thread (arg=0xb459cb40) at pthread_create.c:333
        __res = <optimized out>
        pd = 0xb459cb40
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {-1226862592, 0, 4001536, -1269185816, 641283080, 689463821}, 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 0xb6b1559e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:113
No locals.
.
Thread 1 (Thread 0xb48cf840 (LWP 8461)):
#0  do_lookup_x (undef_name=0x0, new_hash=1, old_hash=0xbfbe816b, ref=0x0, result=0x1fa1, scope=0x3e8, i=152, version=0xb7746e30 <check_match+304>, flags=-1226508230, skip=0xb72ec8ba, type_class=0, undef_map=0x5b) at dl-lookup.c:361
        n = <error reading variable n (Cannot access memory at address 0x3ec)>
        list = <optimized out>
#1  0x00000000 in ?? ()
No symbol table info available.