.
Thread 2 (Thread 2713):
#0  _int_free (av=0x7f9e5b852e40, p=0x15757b0) at malloc.c:4837
        size = <value optimized out>
        nextchunk = <value optimized out>
        nextsize = <value optimized out>
        prevsize = <value optimized out>
        bck = <value optimized out>
        fwd = <value optimized out>
        errstr = <value optimized out>
        __PRETTY_FUNCTION__ = "_int_free"
#1  0x00007f9e5b56270c in *__GI___libc_free (mem=<value optimized out>)
    at malloc.c:3716
        ar_ptr = 0x7f9e5b852e40
        p = 0xffffffffffffffe0
#2  0x000000000047c055 in ?? ()
No symbol table info available.
#3  0x00007f9e5b520c12 in __run_exit_handlers (status=1) at exit.c:78
        atfct = <value optimized out>
        onfct = <value optimized out>
        cxafct = 0x157a410
        run_list_atexit = <value optimized out>
        listp = <value optimized out>
#4  *__GI_exit (status=1) at exit.c:100
No locals.
#5  0x00007f9e5de2c716 in ?? () from /usr/lib/libgdk-x11-2.0.so.0
No symbol table info available.
#6  0x00007f9e5e2bcfae in _XIOError () from /usr/lib/libX11.so.6
No symbol table info available.
#7  0x00007f9e5e2c49a5 in ?? () from /usr/lib/libX11.so.6
No symbol table info available.
#8  0x00007f9e5e2c4f40 in _XReply () from /usr/lib/libX11.so.6
No symbol table info available.
#9  0x00007f9e5e2b2970 in XQueryPointer () from /usr/lib/libX11.so.6
No symbol table info available.
#10 0x00007f9e5de3627e in ?? () from /usr/lib/libgdk-x11-2.0.so.0
No symbol table info available.
#11 0x00007f9e5dde9a2d in ?? () from /usr/lib/libgdk-x11-2.0.so.0
No symbol table info available.
#12 0x00007f9e5ddea1ac in gdk_display_get_window_at_pointer ()
   from /usr/lib/libgdk-x11-2.0.so.0
No symbol table info available.
#13 0x00007f9e5f064e4b in gtk_tooltip_trigger_tooltip_query ()
   from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#14 0x00007f9e5c05c53c in g_slist_foreach () from /lib/libglib-2.0.so.0
No symbol table info available.
#15 0x00007f9e5f0a3089 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#16 0x00007f9e5dde78c6 in ?? () from /usr/lib/libgdk-x11-2.0.so.0
No symbol table info available.
#17 0x00007f9e5c03dbbe in g_main_context_dispatch ()
   from /lib/libglib-2.0.so.0
No symbol table info available.
#18 0x00007f9e5c041588 in ?? () from /lib/libglib-2.0.so.0
No symbol table info available.
#19 0x00007f9e5c0419e5 in g_main_loop_run () from /lib/libglib-2.0.so.0
No symbol table info available.
#20 0x00007f9e5ef96177 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#21 0x000000000042a053 in ?? ()
No symbol table info available.
#22 0x0000000000445214 in ?? ()
No symbol table info available.
#23 0x00007f9e5b506abd in __libc_start_main (main=<value optimized out>, 
    argc=<value optimized out>, ubp_av=<value optimized out>, 
    init=<value optimized out>, fini=<value optimized out>, 
    rtld_fini=<value optimized out>, stack_end=0x7fff2fa9cc28)
    at libc-start.c:220
        result = <value optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -7661537107052646767, 
                4339760, 140733993045040, 0, 0, 7661361582058188433, 
                7678767343938776721}, mask_was_saved = 0}}, priv = {pad = {
              0x0, 0x0, 0x47fbd0, 0x7fff2fa9cc38}, data = {prev = 0x0, 
              cleanup = 0x0, canceltype = 4717520}}}
        not_first_call = <value optimized out>
#24 0x0000000000423859 in ?? ()
No symbol table info available.
#25 0x00007fff2fa9cc28 in ?? ()
No symbol table info available.
#26 0x000000000000001c in ?? ()
No symbol table info available.
#27 0x0000000000000001 in ?? ()
No symbol table info available.
#28 0x00007fff2fa9db74 in ?? ()
No symbol table info available.
#29 0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 1 (Thread 2714):
#0  __run_exit_handlers (status=1) at exit.c:50
        run_list_atexit = <value optimized out>
        listp = <value optimized out>
#1  *__GI_exit (status=1) at exit.c:100
No locals.
#2  0x00007f9e5de2c716 in ?? () from /usr/lib/libgdk-x11-2.0.so.0
No symbol table info available.
#3  0x00007f9e5e2bcfae in _XIOError () from /usr/lib/libX11.so.6
No symbol table info available.
#4  0x00007f9e5e2c49a5 in ?? () from /usr/lib/libX11.so.6
No symbol table info available.
#5  0x00007f9e5e2c4f40 in _XReply () from /usr/lib/libX11.so.6
No symbol table info available.
#6  0x00007f9e61b32686 in XRecordEnableContext () from /usr/lib/libXtst.so.6
No symbol table info available.
#7  0x0000000000476f92 in ?? ()
No symbol table info available.
#8  0x000000000047be96 in ?? ()
No symbol table info available.
#9  0x000000000047beae in Thread::thread_handler(void*) ()
No symbol table info available.
#10 0x00007f9e5c066b34 in ?? () from /lib/libglib-2.0.so.0
No symbol table info available.
#11 0x00007f9e6103aa04 in start_thread (arg=<value optimized out>)
    at pthread_create.c:300
        __res = <value optimized out>
        pd = 0x7f9e54a6a910
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140318001768720, 
                -7661537107052646767, 140733993044288, 0, 0, 3, 
                7678753752853458577, 7678640185104608913}, 
              mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, 
            data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <value optimized out>
        robust = <value optimized out>
#12 0x00007f9e5b5c77bd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#13 0x0000000000000000 in ?? ()
No symbol table info available.