#0  0x00007fb6b5fc7227 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:55
        resultvar = 0
        pid = 12550
        selftid = 12634
#1  0x00007fb6b5fc8e8a in __GI_abort () at abort.c:89
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x4, sa_sigaction = 0x4}, sa_mask = {__val = {140420640553136, 140727966824835, 140420640553216, 22454614376, 140422722015232, 140422715416488, 140422173538653, 140422173539840, 140420640553600, 140420333588048, 140422714320892, 140422715435392, 140422715416488, 140420333588072, 140422713808048, 140422715400617}}, sa_flags = -1233727488, sa_restorer = 0x7fb6b6121fa8}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007fb6b5fbfffd in __assert_fail_base (fmt=0x7fb6b6121fa8 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x7fb695c5b95d "!xcb_xlib_unknown_req_in_deq", file=file@entry=0x7fb695c5b92b "../../src/xcb_io.c", line=line@entry=179, function=function@entry=0x7fb695c5be00 <__PRETTY_FUNCTION__.14515> "dequeue_pending_request") at assert.c:92
        str = 0x7fb6200026d0 ""
        total = 4096
#3  0x00007fb6b5fc00b2 in __GI___assert_fail (assertion=assertion@entry=0x7fb695c5b95d "!xcb_xlib_unknown_req_in_deq", file=file@entry=0x7fb695c5b92b "../../src/xcb_io.c", line=line@entry=179, function=function@entry=0x7fb695c5be00 <__PRETTY_FUNCTION__.14515> "dequeue_pending_request") at assert.c:101
No locals.
#4  0x00007fb695be8c9c in dequeue_pending_request (dpy=dpy@entry=0x7fb6281a3c00, req=req@entry=0x7fb6281b8e60) at ../../src/xcb_io.c:177
        xcb_xlib_unknown_req_in_deq = 1
        __PRETTY_FUNCTION__ = "dequeue_pending_request"
#5  0x00007fb695be9b98 in _XReply (dpy=dpy@entry=0x7fb6281a3c00, rep=rep@entry=0x7fb63a663ad0, extra=extra@entry=0, discard=discard@entry=1) at ../../src/xcb_io.c:639
        req = <optimized out>
        response = 0x0
        error = 0x0
        c = <optimized out>
        reply = <optimized out>
        current = 0x7fb6200011e0
        __PRETTY_FUNCTION__ = "_XReply"
#6  0x00007fb695bcff91 in XGetSelectionOwner (dpy=0x7fb6281a3c00, selection=336) at ../../src/GetSOwner.c:41
        rep = {type = 0 '\000', pad1 = 40 '(', sequenceNumber = 10267, length = 32694, owner = 23068675, pad2 = 0, pad3 = 672807936, pad4 = 32694, pad5 = 672884160, pad6 = 32694}
        req = <optimized out>
#7  0x00007fb68ec20bee in check_manager_window (client=0x7fb6281b6450) at /build/gtk+2.0-tESQz7/gtk+2.0-2.24.29/gdk/x11/xsettings-client.c:430
No locals.
#8  0x00007fb68ec20fa1 in _gdk_xsettings_client_process_event (client=<optimized out>, xev=<optimized out>) at /build/gtk+2.0-tESQz7/gtk+2.0-2.24.29/gdk/x11/xsettings-client.c:597
No locals.
#9  0x00007fb68ec069b3 in gdk_xsettings_client_event_filter (xevent=<optimized out>, event=<optimized out>, data=<optimized out>) at /build/gtk+2.0-tESQz7/gtk+2.0-2.24.29/gdk/x11/gdkevents-x11.c:3115
        screen = <optimized out>
#10 0x00007fb68ec06ef1 in gdk_event_apply_filters (xevent=xevent@entry=0x7fb63a663d10, event=event@entry=0x7fb620003310, window=window@entry=0x7fb6b04456c0) at /build/gtk+2.0-tESQz7/gtk+2.0-2.24.29/gdk/x11/gdkevents-x11.c:371
        filter = 0x7fb6281b65c0
        node = <optimized out>
        tmp_list = 0x7fb62802b800
        result = <optimized out>
#11 0x00007fb68ec082d6 in gdk_event_translate (display=display@entry=0x7fb6281b0040, event=event@entry=0x7fb620003310, xevent=xevent@entry=0x7fb63a663d10, return_exposes=return_exposes@entry=0) at /build/gtk+2.0-tESQz7/gtk+2.0-2.24.29/gdk/x11/gdkevents-x11.c:1074
        filter_private = 0x7fb6b04456c0
        result = <optimized out>
        window = <optimized out>
        window_private = <optimized out>
        filter_window = 0x7fb6b04456c0
        window_impl = <optimized out>
        return_val = 0
        screen = <optimized out>
        screen_x11 = <optimized out>
        toplevel = <optimized out>
        display_x11 = 0x7fb6281b0040
        xwindow = 23068675
        filter_xwindow = <optimized out>
#12 0x00007fb68ec09b76 in _gdk_events_queue (display=display@entry=0x7fb6281b0040) at /build/gtk+2.0-tESQz7/gtk+2.0-2.24.29/gdk/x11/gdkevents-x11.c:2358
        node = 0x7fb620001e60
        event = 0x7fb620003310
        xevent = {type = 17, xany = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, window = 23068675}, xkey = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, window = 23068675, root = 23068675, subwindow = 2004562, time = 140419660775424, x = 0, y = 0, x_root = 0, y_root = 0, state = 1, keycode = 0, same_screen = 182}, xbutton = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, window = 23068675, root = 23068675, subwindow = 2004562, time = 140419660775424, x = 0, y = 0, x_root = 0, y_root = 0, state = 1, button = 0, same_screen = 182}, xmotion = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, window = 23068675, root = 23068675, subwindow = 2004562, time = 140419660775424, x = 0, y = 0, x_root = 0, y_root = 0, state = 1, is_hint = 0 '\000', same_screen = 182}, xcrossing = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, window = 23068675, root = 23068675, subwindow = 2004562, time = 140419660775424, x = 0, y = 0, x_root = 0, y_root = 0, mode = 1, detail = 0, same_screen = 182, focus = 0, state = 52}, xfocus = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, window = 23068675, mode = 23068675, detail = 0}, xexpose = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, window = 23068675, x = 23068675, y = 0, width = 2004562, height = 0, count = 0}, xgraphicsexpose = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, drawable = 23068675, x = 23068675, y = 0, width = 2004562, height = 0, count = 0, major_code = 32694, minor_code = 0}, xnoexpose = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, drawable = 23068675, major_code = 23068675, minor_code = 0}, xvisibility = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, window = 23068675, state = 23068675}, xcreatewindow = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, parent = 23068675, window = 23068675, x = 2004562, y = 0, width = 0, height = 32694, border_width = 0, override_redirect = 0}, xdestroywindow = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, event = 23068675, window = 23068675}, xunmap = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, event = 23068675, window = 23068675, from_configure = 2004562}, xmap = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, event = 23068675, window = 23068675, override_redirect = 2004562}, xmaprequest = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, parent = 23068675, window = 23068675}, xreparent = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, event = 23068675, window = 23068675, parent = 2004562, x = 0, y = 32694, override_redirect = 0}, xconfigure = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, event = 23068675, window = 23068675, x = 2004562, y = 0, width = 0, height = 32694, border_width = 0, above = 0, override_redirect = 1}, xgravity = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, event = 23068675, window = 23068675, x = 2004562, y = 0}, xresizerequest = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, window = 23068675, width = 23068675, height = 0}, xconfigurerequest = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, parent = 23068675, window = 23068675, x = 2004562, y = 0, width = 0, height = 32694, border_width = 0, above = 0, detail = 1, value_mask = 182}, xcirculate = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, event = 23068675, window = 23068675, place = 2004562}, xcirculaterequest = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, parent = 23068675, window = 23068675, place = 2004562}, xproperty = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, window = 23068675, atom = 23068675, time = 2004562, state = 0}, xselectionclear = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, window = 23068675, selection = 23068675, time = 2004562}, xselectionrequest = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, owner = 23068675, requestor = 23068675, selection = 2004562, target = 140419660775424, property = 0, time = 0}, xselection = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, requestor = 23068675, selection = 23068675, target = 2004562, property = 140419660775424, time = 0}, xcolormap = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, window = 23068675, colormap = 23068675, new = 2004562, state = 0}, xclient = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, window = 23068675, message_type = 23068675, format = 2004562, data = {b = "\000\000\000\000\266\177", '\000' <repeats 13 times>, s = {0, 0, 32694, 0, 0, 0, 0, 0, 0, 0}, l = {140419660775424, 0, 0, 1, 182}}}, xmapping = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, window = 23068675, request = 23068675, first_keycode = 0, count = 2004562}, xerror = {type = 17, display = 0x71, resourceid = 0, serial = 140420333583360, error_code = 3 '\003', request_code = 0 '\000', minor_code = 96 '`'}, xkeymap = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, window = 23068675, key_vector = "\003\000`\001\000\000\000\000R\226\036\000\000\000\000\000\000\000\000\000\266\177\000\000\000\000\000\000\000\000\000"}, xgeneric = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, extension = 23068675, evtype = 0}, xcookie = {type = 17, serial = 113, send_event = 0, display = 0x7fb6281a3c00, extension = 23068675, evtype = 0, cookie = 23068675, data = 0x1e9652}, pad = {140419660775441, 113, 0, 140420333583360, 23068675, 23068675, 2004562, 140419660775424, 0, 0, 1, 182, 52, 655369, 140420333615824, 140420333663536, 4, 140419660775428, 140420333662976, 0, 0, 1, 182, 47}}
        xdisplay = 0x7fb6281a3c00
#13 0x00007fb68ec09c1e in gdk_event_dispatch (source=<optimized out>, callback=<optimized out>, user_data=<optimized out>) at /build/gtk+2.0-tESQz7/gtk+2.0-2.24.29/gdk/x11/gdkevents-x11.c:2419
        display = 0x7fb6281b0040
        event = <optimized out>
#14 0x00007fb68e695147 in g_main_context_dispatch () from /tmp/apport_sandbox_UtZkcj/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#15 0x00007fb68e6953a0 in g_main_context_iterate.isra () from /tmp/apport_sandbox_UtZkcj/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#16 0x00007fb68e6956c2 in g_main_loop_run () from /tmp/apport_sandbox_UtZkcj/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#17 0x00007fb68f2be088 in ?? ()
No symbol table info available.
#18 0x00007fb62802ac50 in ?? ()
No symbol table info available.
#19 0x00007fb68e6bbb95 in g_thread_proxy () from /tmp/apport_sandbox_UtZkcj/lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#20 0x00007fb6b595d66a in start_thread (arg=0x7fb63a664700) at pthread_create.c:333
        __res = <optimized out>
        pd = 0x7fb63a664700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140420640556800, -819124314930277875, 0, 140421407216127, 140420640557504, 140420332085744, 850500878555288077, 850206081369510413}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#21 0x00007fb6b6098e4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
No locals.