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GNU gdb (GDB; openSUSE Leap 15.0) 8.2
Copyright (C) 2018 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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Reading symbols from /usr/bin/xfwm4...Reading symbols from /usr/lib/debug/usr/bin/xfwm4-20190509T082824.3dfe0130-20.xfce.1.x86_64.debug...done.
done.
[New LWP 2215]
[New LWP 2225]
[New LWP 2226]
[New LWP 2335]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Core was generated by `xfwm4'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  __strchr_avx2 () at ../sysdeps/x86_64/multiarch/strchr-avx2.S:57
57		vmovdqu	(%rdi), %ymm8
[Current thread is 1 (Thread 0x7f4a44903f00 (LWP 2215))]
(gdb) bt
#0  0x00007f4a4036da58 in __strchr_avx2 () at ../sysdeps/x86_64/multiarch/strchr-avx2.S:57
#1  0x00005631e347f600 in frameDrawWin (c=c@entry=0x5631e4738c00) at frame.c:1071
#2  0x00005631e3480aee in update_frame_idle_cb (data=data@entry=0x5631e4738c00) at frame.c:1330
#3  0x00007f4a414c8807 in g_idle_dispatch (source=0x5631e4848d70, callback=0x5631e3480ae0 <update_frame_idle_cb>, user_data=0x5631e4738c00) at gmain.c:5486
#4  0x00007f4a414cbe07 in g_main_dispatch (context=0x5631e40db160) at gmain.c:3142
#5  0x00007f4a414cbe07 in g_main_context_dispatch (context=context@entry=0x5631e40db160) at gmain.c:3795
#6  0x00007f4a414cc1b0 in g_main_context_iterate (context=0x5631e40db160, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3868
#7  0x00007f4a414cc4c2 in g_main_loop_run (loop=0x5631e480bb10) at gmain.c:4064
#8  0x00007f4a42d06515 in gtk_main () at gtkmain.c:1323
#9  0x00005631e346d13e in clientButtonPress (c=c@entry=0x5631e4738c00, w=w@entry=10607329, event=event@entry=0x5631e4873360) at client.c:3881
#10 0x00005631e347b198 in handleButtonPress (event=0x5631e4873360, display_info=0x5631e438c8e0) at events.c:974
#11 0x00005631e347b198 in handleEvent (event=<optimized out>, display_info=0x5631e438c8e0) at events.c:2231
#12 0x00005631e347b198 in xfwm4_event_filter (event=0x5631e4873360, data=0x5631e438c8e0) at events.c:2342
#13 0x00005631e3478649 in eventXfwmFilter (gdk_xevent=<optimized out>, gevent=<optimized out>, data=<optimized out>) at event_filter.c:177
#14 0x00007f4a42836a0f in gdk_event_apply_filters (xevent=xevent@entry=0x7ffc8c3803a0, event=event@entry=0x5631e491f470, window=window@entry=0x0) at gdkeventsource.c:79
#15 0x00007f4a42836e02 in gdk_event_source_translate_event (xevent=0x7ffc8c3803a0, event_source=0x5631e40db070) at gdkeventsource.c:198
#16 0x00007f4a42836e02 in _gdk_x11_display_queue_events (display=0x5631e40a80e0 [GdkX11Display]) at gdkeventsource.c:341
#17 0x00007f4a42800890 in gdk_display_get_event (display=display@entry=0x5631e40a80e0 [GdkX11Display]) at gdkdisplay.c:438
#18 0x00007f4a42836aa2 in gdk_event_source_dispatch (source=<optimized out>, callback=<optimized out>, user_data=<optimized out>) at gdkeventsource.c:363
#19 0x00007f4a414cbe07 in g_main_dispatch (context=0x5631e40db160) at gmain.c:3142
#20 0x00007f4a414cbe07 in g_main_context_dispatch (context=context@entry=0x5631e40db160) at gmain.c:3795
#21 0x00007f4a414cc1b0 in g_main_context_iterate (context=0x5631e40db160, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3868
#22 0x00007f4a414cc4c2 in g_main_loop_run (loop=0x5631e46e3ac0) at gmain.c:4064
#23 0x00007f4a42d06515 in gtk_main () at gtkmain.c:1323
#24 0x00005631e34679c9 in main (argc=<optimized out>, argv=<optimized out>) at main.c:773
(gdb) bt full
#0  0x00007f4a4036da58 in __strchr_avx2 () at ../sysdeps/x86_64/multiarch/strchr-avx2.S:57
#1  0x00005631e347f600 in frameDrawWin (c=c@entry=0x5631e4738c00) at frame.c:1071
        screen_info = 0x7f4a405c9108 <main_arena+1256>
        frame_pix = 
              {pm_title = {screen_info = 0x5631e438f0b0, pixmap = 0, mask = 0, pict_format = 0x5631e41f7ff0, pict = 0, width = 0, height = 0}, pm_sides = {{screen_info = 0x5631e438f0b0, pixmap = 0, mask = 0, pict_format = 0x5631e41f7ff0, pict = 0, width = 0, height = 0}, {screen_info = 0x5631e438f0b0, pixmap = 0, mask = 0, pict_format = 0x5631e41f7ff0, pict = 0, width = 0, height = 0}, {screen_info = 0x5631e438f0b0, pixmap = 0, mask = 31, pict_format = 0x7f4a414e9b6f <g_slice_free_chain_with_offset+79>, pict = 0, width = 47, height = 0}, {screen_info = 0x20, pixmap = 17520879987820915200, mask = 8015, pict_format = 0x5631e4783b00, pict = 94772279488864, width = 1, height = 0}}}
        my_pixmap = <optimized out>
        state = 0
        x = <optimized out>
        button = <optimized out>
        left = <optimized out>
        right = <optimized out>
        top_width = <optimized out>
        bottom_width = <optimized out>
        left_height = <optimized out>
        right_height = <optimized out>
        button_x = {0, 22065, 1087760509, 1853, 1876, 1899}
        i = 0
        j = <optimized out>
        requires_clearing = 1
        width_changed = 0
        height_changed = 0
        __func__ = "frameDrawWin"
#2  0x00005631e3480aee in update_frame_idle_cb (data=data@entry=0x5631e4738c00) at frame.c:1330
        c = 0x5631e4738c00
#3  0x00007f4a414c8807 in g_idle_dispatch (source=0x5631e4848d70, callback=0x5631e3480ae0 <update_frame_idle_cb>, user_data=0x5631e4738c00) at gmain.c:5486
        again = <optimized out>
#4  0x00007f4a414cbe07 in g_main_dispatch (context=0x5631e40db160) at gmain.c:3142
        dispatch = 0x7f4a414c87f0 <g_idle_dispatch>
        prev_source = 0x5631e40db070
        was_in_call = 0
        user_data = 0x5631e4738c00
        callback = 0x5631e3480ae0 <update_frame_idle_cb>
        cb_funcs = 0x7f4a41793920 <g_source_callback_funcs>
        cb_data = 0x5631e48145d0
        need_destroy = <optimized out>
        source = 0x5631e4848d70
        current = 0x5631e4081540
        i = 1
#5  0x00007f4a414cbe07 in g_main_context_dispatch (context=context@entry=0x5631e40db160) at gmain.c:3795
#6  0x00007f4a414cc1b0 in g_main_context_iterate (context=0x5631e40db160, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3868
        max_priority = 200
        timeout = 0
        some_ready = 1
        nfds = <optimized out>
        allocated_nfds = 4
        fds = 0x5631e46e39f0
#7  0x00007f4a414cc4c2 in g_main_loop_run (loop=0x5631e480bb10) at gmain.c:4064
        __func__ = "g_main_loop_run"
#8  0x00007f4a42d06515 in gtk_main () at gtkmain.c:1323
        loop = 0x5631e480bb10
#9  0x00005631e346d13e in clientButtonPress (c=c@entry=0x5631e4738c00, w=w@entry=10607329, event=event@entry=0x5631e4873360) at client.c:3881
        screen_info = <optimized out>
        display_info = 0x5631e438c8e0
        passdata = {b = 5, c = 0x5631e4738c00}
        b = 5
        g1 = <optimized out>
        __func__ = "clientButtonPress"
#10 0x00005631e347b198 in handleButtonPress (event=0x5631e4873360, display_info=0x5631e438c8e0) at events.c:974
        screen_info = 0x5631e438f0b0
        c = 0x5631e4738c00
        state = 0
        win = 10607329
        replay = 0
        status = EVENT_FILTER_STOP
        display_info = 0x5631e438c8e0
#11 0x00005631e347b198 in handleEvent (event=<optimized out>, display_info=0x5631e438c8e0) at events.c:2231
        status = EVENT_FILTER_STOP
        display_info = 0x5631e438c8e0
#12 0x00005631e347b198 in xfwm4_event_filter (event=0x5631e4873360, data=0x5631e438c8e0) at events.c:2342
        display_info = 0x5631e438c8e0
#13 0x00005631e3478649 in eventXfwmFilter (gdk_xevent=<optimized out>, gevent=<optimized out>, data=<optimized out>) at event_filter.c:177
        filterelt_next = 0x5631e46d9d30
        event = 0x5631e4873360
        loop = EVENT_FILTER_REMOVE
        setup = <optimized out>
        filterelt = 0x5631e40f1690
        __func__ = "eventXfwmFilter"
#14 0x00007f4a42836a0f in gdk_event_apply_filters (xevent=xevent@entry=0x7ffc8c3803a0, event=event@entry=0x5631e491f470, window=window@entry=0x0) at gdkeventsource.c:79
        filter = 0x5631e46d9e60
        node = <optimized out>
        tmp_list = 0x5631e4201820 = {0x5631e46d9e60}
        result = <optimized out>
#15 0x00007f4a42836e02 in gdk_event_source_translate_event (xevent=0x7ffc8c3803a0, event_source=0x5631e40db070) at gdkeventsource.c:198
        dpy = 0x5631e4099b20
        event = 0x5631e491f470
        result = GDK_FILTER_CONTINUE
        event_translator = 0x0
        xevent = 
            {type = 35, xany = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, window = 17179869315}, xkey = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, window = 17179869315, root = 2711, subwindow = 94772287189184, time = 234, x = 1181493, y = 0, x_root = 1, y_root = 0, state = 0, keycode = 0, same_screen = 0}, xbutton = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, window = 17179869315, root = 2711, subwindow = 94772287189184, time = 234, x = 1181493, y = 0, x_root = 1, y_root = 0, state = 0, button = 0, same_screen = 0}, xmotion = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, window = 17179869315, root = 2711, subwindow = 94772287189184, time = 234, x = 1181493, y = 0, x_root = 1, y_root = 0, state = 0, is_hint = 0 '\000', same_screen = 0}, xcrossing = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, window = 17179869315, root = 2711, subwindow = 94772287189184, time = 234, x = 1181493, y = 0, x_root = 1, y_root = 0, mode = 0, detail = 0, same_screen = 0, focus = 0, state = 0}, xfocus = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, window = 17179869315, mode = 2711, detail = 0}, xexpose = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, window = 17179869315, x = 2711, y = 0, width = -461164352, height = 22065, count = 234}, xgraphicsexpose = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, drawable = 17179869315, x = 2711, y = 0, width = -461164352, height = 22065, count = 234, major_code = 0, minor_code = 1181493}, xnoexpose = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, drawable = 17179869315, major_code = 2711, minor_code = 0}, xvisibility = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, window = 17179869315, state = 2711}, xcreatewindow = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, parent = 17179869315, window = 2711, x = -461164352, y = 22065, width = 234, height = 0, border_width = 1181493, override_redirect = 0}, xdestroywindow = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, event = 17179869315, window = 2711}, xunmap = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, event = 17179869315, window = 2711, from_configure = -461164352}, xmap = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, event = 17179869315, window = 2711, override_redirect = -461164352}, xmaprequest = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, parent = 17179869315, window = 2711}, xreparent = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, event = 17179869315, window = 2711, parent = 94772287189184, x = 234, y = 0, override_redirect = 1181493}, xconfigure = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, event = 17179869315, window = 2711, x = -461164352, y = 22065, width = 234, height = 0, border_width = 1181493, above = 1, override_redirect = 0}, xgravity = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, event = 17179869315, window = 2711, x = -461164352, y = 22065}, xresizerequest = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, window = 17179869315, width = 2711, height = 0}, xconfigurerequest = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, parent = 17179869315, window = 2711, x = -461164352, y = 22065, width = 234, height = 0, border_width = 1181493, above = 1, detail = 0, value_mask = 0}, xcirculate = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, event = 17179869315, window = 2711, place = -461164352}, xcirculaterequest = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, parent = 17179869315, window = 2711, place = -461164352}, xproperty = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, window = 17179869315, atom = 2711, time = 94772287189184, state = 234}, xselectionclear = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, window = 17179869315, selection = 2711, time = 94772287189184}, xselectionrequest = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, owner = 17179869315, requestor = 2711, selection = 94772287189184, target = 234, property = 1181493, time = 1}, xselection = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, requestor = 17179869315, selection = 2711, target = 94772287189184, property = 234, time = 1181493}, xcolormap = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, window = 17179869315, colormap = 2711, new = -461164352, state = 22065}, xclient = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, window = 17179869315, message_type = 2711, format = -461164352, data = {b = "\352\000\000\000\000\000\000\000\065\a\022\000\000\000\000\000\001\000\000", s = {234, 0, 0, 0, 1845, 18, 0, 0, 1, 0}, l = {234, 1181493, 1, 0, 0}}}, xmapping = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, window = 17179869315, request = 2711, first_keycode = 0, count = -461164352}, xerror = {type = 35, display = 0x1897e6, resourceid = 0, serial = 94772279221024, error_code = 131 '\203', request_code = 0 '\000', minor_code = 0 '\000'}, xkeymap = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, window = 17179869315, key_vector = "\227\n\000\000\000\000\000\000\300\060\203\344\061V\000\000\352\000\000\000\000\000\000\000\065\a\022\000\000\000\000"}, xgeneric = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, extension = 131, evtype = 4}, xcookie = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, extension = 131, evtype = 4, cookie = 2711, data = 0x5631e48330c0}, pad = {35, 1611750, 0, 94772279221024, 17179869315, 2711, 94772287189184, 234, 1181493, 1, 0, 0, 139955804307456, 17179869186, 0, 8, 34359738375, 8, 34359738375, 8, 34359738375, 8, 34359738375, 4623325001842447921}}
        xdisplay = 0x5631e4099b20
        event_source = 0x5631e40db070
        display_x11 = 0x5631e40a80e0 [GdkX11Display]
#16 0x00007f4a42836e02 in _gdk_x11_display_queue_events (display=0x5631e40a80e0 [GdkX11Display]) at gdkeventsource.c:341
        xevent = 
            {type = 35, xany = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, window = 17179869315}, xkey = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, window = 17179869315, root = 2711, subwindow = 94772287189184, time = 234, x = 1181493, y = 0, x_root = 1, y_root = 0, state = 0, keycode = 0, same_screen = 0}, xbutton = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, window = 17179869315, root = 2711, subwindow = 94772287189184, time = 234, x = 1181493, y = 0, x_root = 1, y_root = 0, state = 0, button = 0, same_screen = 0}, xmotion = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, window = 17179869315, root = 2711, subwindow = 94772287189184, time = 234, x = 1181493, y = 0, x_root = 1, y_root = 0, state = 0, is_hint = 0 '\000', same_screen = 0}, xcrossing = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, window = 17179869315, root = 2711, subwindow = 94772287189184, time = 234, x = 1181493, y = 0, x_root = 1, y_root = 0, mode = 0, detail = 0, same_screen = 0, focus = 0, state = 0}, xfocus = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, window = 17179869315, mode = 2711, detail = 0}, xexpose = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, window = 17179869315, x = 2711, y = 0, width = -461164352, height = 22065, count = 234}, xgraphicsexpose = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, drawable = 17179869315, x = 2711, y = 0, width = -461164352, height = 22065, count = 234, major_code = 0, minor_code = 1181493}, xnoexpose = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, drawable = 17179869315, major_code = 2711, minor_code = 0}, xvisibility = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, window = 17179869315, state = 2711}, xcreatewindow = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, parent = 17179869315, window = 2711, x = -461164352, y = 22065, width = 234, height = 0, border_width = 1181493, override_redirect = 0}, xdestroywindow = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, event = 17179869315, window = 2711}, xunmap = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, event = 17179869315, window = 2711, from_configure = -461164352}, xmap = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, event = 17179869315, window = 2711, override_redirect = -461164352}, xmaprequest = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, parent = 17179869315, window = 2711}, xreparent = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, event = 17179869315, window = 2711, parent = 94772287189184, x = 234, y = 0, override_redirect = 1181493}, xconfigure = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, event = 17179869315, window = 2711, x = -461164352, y = 22065, width = 234, height = 0, border_width = 1181493, above = 1, override_redirect = 0}, xgravity = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, event = 17179869315, window = 2711, x = -461164352, y = 22065}, xresizerequest = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, window = 17179869315, width = 2711, height = 0}, xconfigurerequest = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, parent = 17179869315, window = 2711, x = -461164352, y = 22065, width = 234, height = 0, border_width = 1181493, above = 1, detail = 0, value_mask = 0}, xcirculate = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, event = 17179869315, window = 2711, place = -461164352}, xcirculaterequest = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, parent = 17179869315, window = 2711, place = -461164352}, xproperty = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, window = 17179869315, atom = 2711, time = 94772287189184, state = 234}, xselectionclear = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, window = 17179869315, selection = 2711, time = 94772287189184}, xselectionrequest = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, owner = 17179869315, requestor = 2711, selection = 94772287189184, target = 234, property = 1181493, time = 1}, xselection = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, requestor = 17179869315, selection = 2711, target = 94772287189184, property = 234, time = 1181493}, xcolormap = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, window = 17179869315, colormap = 2711, new = -461164352, state = 22065}, xclient = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, window = 17179869315, message_type = 2711, format = -461164352, data = {b = "\352\000\000\000\000\000\000\000\065\a\022\000\000\000\000\000\001\000\000", s = {234, 0, 0, 0, 1845, 18, 0, 0, 1, 0}, l = {234, 1181493, 1, 0, 0}}}, xmapping = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, window = 17179869315, request = 2711, first_keycode = 0, count = -461164352}, xerror = {type = 35, display = 0x1897e6, resourceid = 0, serial = 94772279221024, error_code = 131 '\203', request_code = 0 '\000', minor_code = 0 '\000'}, xkeymap = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, window = 17179869315, key_vector = "\227\n\000\000\000\000\000\000\300\060\203\344\061V\000\000\352\000\000\000\000\000\000\000\065\a\022\000\000\000\000"}, xgeneric = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, extension = 131, evtype = 4}, xcookie = {type = 35, serial = 1611750, send_event = 0, display = 0x5631e4099b20, extension = 131, evtype = 4, cookie = 2711, data = 0x5631e48330c0}, pad = {35, 1611750, 0, 94772279221024, 17179869315, 2711, 94772287189184, 234, 1181493, 1, 0, 0, 139955804307456, 17179869186, 0, 8, 34359738375, 8, 34359738375, 8, 34359738375, 8, 34359738375, 4623325001842447921}}
        xdisplay = 0x5631e4099b20
        event_source = 0x5631e40db070
        display_x11 = 0x5631e40a80e0 [GdkX11Display]
#17 0x00007f4a42800890 in gdk_display_get_event (display=display@entry=0x5631e40a80e0 [GdkX11Display]) at gdkdisplay.c:438
        __func__ = "gdk_display_get_event"
#18 0x00007f4a42836aa2 in gdk_event_source_dispatch (source=<optimized out>, callback=<optimized out>, user_data=<optimized out>) at gdkeventsource.c:363
        display = 0x5631e40a80e0 [GdkX11Display]
        event = <optimized out>
#19 0x00007f4a414cbe07 in g_main_dispatch (context=0x5631e40db160) at gmain.c:3142
        dispatch = 0x7f4a42836a90 <gdk_event_source_dispatch>
        prev_source = 0x0
        was_in_call = 0
        user_data = 0x0
        callback = 0x0
        cb_funcs = 0x0
        cb_data = 0x0
        need_destroy = <optimized out>
        source = 0x5631e40db070
        current = 0x5631e4081540
        i = 0
#20 0x00007f4a414cbe07 in g_main_context_dispatch (context=context@entry=0x5631e40db160) at gmain.c:3795
#21 0x00007f4a414cc1b0 in g_main_context_iterate (context=0x5631e40db160, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3868
        max_priority = 0
        timeout = 0
        some_ready = 1
        nfds = <optimized out>
        allocated_nfds = 4
        fds = 0x5631e46e39f0
#22 0x00007f4a414cc4c2 in g_main_loop_run (loop=0x5631e46e3ac0) at gmain.c:4064
        __func__ = "g_main_loop_run"
#23 0x00007f4a42d06515 in gtk_main () at gtkmain.c:1323
        loop = 0x5631e46e3ac0
#24 0x00005631e34679c9 in main (argc=<optimized out>, argv=<optimized out>) at main.c:773
        version = 0
        replace_wm = 0
        context = <optimized out>
        error = 0x0
        option_entries = 
            {{long_name = 0x5631e34a3189 "daemon", short_name = 0 '\000', flags = 8, arg = G_OPTION_ARG_CALLBACK, arg_data = 0x5631e3484880 <daemon_callback>, description = 0x5631e34a2d78 "Fork to the background (not supported)", arg_description = 0x0}, {long_name = 0x5631e34a3190 "compositor", short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_CALLBACK, arg_data = 0x5631e3484de0 <compositor_callback>, description = 0x5631e34a319b "Set the compositor mode", arg_description = 0x5631e34a31b3 "on|off|auto"}, {long_name = 0x5631e34a31bf "vblank", short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_CALLBACK, arg_data = 0x5631e3484d00 <vblank_callback>, description = 0x5631e34a31c6 "Set the vblank mode", arg_description = 0x5631e34a31da "off|glx"}, {long_name = 0x5631e34a31e2 "replace", short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_NONE, arg_data = 0x7ffc8c380634, description = 0x5631e34a2da0 "Replace the existing window manager", arg_description = 0x0}, {long_name = 0x5631e34a31ea "version", short_name = 86 'V', flags = 0, arg = G_OPTION_ARG_NONE, arg_data = 0x7ffc8c380630, description = 0x5631e34a2dc8 "Print version information and exit", arg_description = 0x0}, {long_name = 0x0, short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_NONE, arg_data = 0x0, description = 0x0, arg_description = 0x0}}
(gdb) quit
           PID: 2215 (xfwm4)
           UID: 1000 (olaf)
           GID: 100 (users)
        Signal: 11 (SEGV)
     Timestamp: Fri 2019-05-10 16:23:11 CEST (59min ago)
  Command Line: xfwm4
    Executable: /usr/bin/xfwm4
 Control Group: /user.slice/user-1000.slice/session-1.scope
          Unit: session-1.scope
         Slice: user-1000.slice
       Session: 1
     Owner UID: 1000 (olaf)
       Boot ID: fa4e5b12f9a844dc941ffd566dd66381
    Machine ID: ca6bb37d865159a93f29a1405937ca0e
      Hostname: latitude
       Storage: /var/lib/systemd/coredump/core.xfwm4.1000.fa4e5b12f9a844dc941ffd566dd66381.2215.1557498191000000.lz4
       Message: Process 2215 (xfwm4) of user 1000 dumped core.