#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
        set = {__val = {0, 93845504126080, 93845504356624, 140056282611742, 0, 14754420102284495104, 93845507275424, 93845507274240, 93845501066016, 14754420102284495104, 93845507432352, 93845503895152, 93845501066016, 0, 140723231970592, 140056240194410}}
        pid = <optimized out>
        tid = <optimized out>
        ret = <optimized out>
#1  0x00007f6160fe7801 in __GI_abort () at abort.c:79
        save_stage = 1
        act = {__sigaction_handler = {sa_handler = 0x555a1bc30380 <compare_window_position>, sa_sigaction = 0x555a1bc30380 <compare_window_position>}, sa_mask = {__val = {0, 93845507481472, 140056240052609, 93845501204864, 93845504405184, 8, 14754420102284495104, 16, 93845504405088, 93845504405184, 93845507481408, 93845501182848, 14754420102284495104, 93845507481472, 140723231971056, 140723231971344}}, sa_flags = -1371482384, sa_restorer = 0x1000}
        sigs = {__val = {32, 0 <repeats 15 times>}}
        __cnt = <optimized out>
        __set = <optimized out>
        __cnt = <optimized out>
        __set = <optimized out>
#2  0x00007f6161030897 in __libc_message (action=action@entry=do_abort, fmt=fmt@entry=0x7f616115db9a "%s\n") at ../sysdeps/posix/libc_fatal.c:181
        ap = {{gp_offset = 24, fp_offset = 21850, overflow_arg_area = 0x7ffcae40d820, reg_save_area = 0x7ffcae40d7b0}}
        fd = <optimized out>
        list = <optimized out>
        nlist = <optimized out>
        cp = <optimized out>
        written = <optimized out>
        on_2 = <optimized out>
        next = <optimized out>
        str = <optimized out>
        len = <optimized out>
        newp = <optimized out>
        iov = <optimized out>
        total = <optimized out>
        cnt = <optimized out>
        buf = <optimized out>
        wp = <optimized out>
        old = <optimized out>
        cnt = <optimized out>
        result = <optimized out>
#3  0x00007f616103790a in malloc_printerr (str=str@entry=0x7f616115f890 "double free or corruption (!prev)") at malloc.c:5350
No locals.
#4  0x00007f616103ee84 in _int_free (have_lock=0, p=0x555a1c1c2c50, av=0x7f6161392c40 <main_arena>) at malloc.c:4281
        fb = <optimized out>
        nextsize = <optimized out>
        nextinuse = <optimized out>
        prevsize = <optimized out>
        fwd = <optimized out>
        size = <optimized out>
        nextchunk = <optimized out>
        bck = <optimized out>
        size = <optimized out>
        fb = <optimized out>
        nextchunk = <optimized out>
        nextsize = <optimized out>
        nextinuse = <optimized out>
        prevsize = <optimized out>
        bck = <optimized out>
        fwd = <optimized out>
        tc_idx = <optimized out>
        idx = <optimized out>
        old = <optimized out>
        old2 = <optimized out>
        fail = <optimized out>
        ignore1 = <optimized out>
        ignore2 = <optimized out>
        ignore3 = <optimized out>
        ignore = <optimized out>
        __atg1_result = <optimized out>
        ret = <optimized out>
        ret = <optimized out>
        ret = <optimized out>
        ret = <optimized out>
        ignore1 = <optimized out>
        ignore2 = <optimized out>
        ignore3 = <optimized out>
        heap = <optimized out>
        ignore = <optimized out>
#5  __GI___libc_free (mem=0x555a1c1c2c60) at malloc.c:3124
        ar_ptr = 0x7f6161392c40 <main_arena>
        p = 0x555a1c1c2c50
        hook = <optimized out>
        mem = 0x555a1c1c2c60
        ar_ptr = <optimized out>
        p = <optimized out>
        hook = <optimized out>
        __x = <optimized out>
        ar_ptr = <optimized out>
        p = <optimized out>
        hook = <optimized out>
        __x = <optimized out>
#6  0x00007f61626fe45d in g_list_foreach (list=<optimized out>, list@entry=0x555a1bf40520, func=0x7f6162707940 <g_free>, user_data=user_data@entry=0x0) at ../../../../glib/glist.c:1011
        next = 0x555a1bf41140
#7  0x0000555a1bc2ab02 in meta_screen_manage_all_windows (screen=0x555a1c19f900) at core/screen.c:801
        windows = 0x555a1bf40520
        list = <optimized out>
#8  0x0000555a1bc18500 in meta_display_open () at core/display.c:750
        screen = <optimized out>
        xdisplay = 0x555a1bed8400
        screens = 0x555a1c1c8220
        tmp = 0x555a1c1c8220
        i = <optimized out>
        timestamp = 16450079
        atom_names = {0x555a1bc627ec "WM_PROTOCOLS", 0x555a1bc627f9 "WM_TAKE_FOCUS", 0x555a1bc62807 "WM_DELETE_WINDOW", 0x555a1bc62a4f "WM_STATE", 0x555a1bc62818 "_MOTIF_WM_HINTS", 0x555a1bc62828 "WM_CHANGE_STATE", 0x555a1bc62838 "SM_CLIENT_ID", 0x555a1bc62845 "WM_CLIENT_LEADER", 0x555a1bc62856 "WM_WINDOW_ROLE", 0x555a1bc62865 "UTF8_STRING", 0x555a1bc62871 "WM_ICON_SIZE", 0x555a1bc6287e "_KWM_WIN_ICON", 0x555a1bc6288c "_MARCO_RESTART_MESSAGE", 0x555a1bc628a3 "_MARCO_RELOAD_THEME_MESSAGE", 0x555a1bc618d0 "_MARCO_SET_KEYBINDINGS_MESSAGE", 0x555a1bc628bf "_MARCO_TOGGLE_VERBOSE", 0x555a1bc628d5 "_GTK_FRAME_EXTENTS", 0x555a1bc628e8 "_GTK_SHOW_WINDOW_MENU", 0x555a1bc628fe "_MATE_PANEL_ACTION", 0x555a1bc62911 "_MATE_PANEL_ACTION_MAIN_MENU", 0x555a1bc6292e "_MATE_PANEL_ACTION_RUN_DIALOG", 0x555a1bc6294c "_MARCO_SENTINEL", 0x555a1bc6295c "_MARCO_VERSION", 0x555a1bc6296b "WM_CLIENT_MACHINE", 0x555a1bc66d3c "MANAGER", 0x555a1bc6297d "TARGETS", 0x555a1bc62985 "MULTIPLE", 0x555a1bc6298e "TIMESTAMP", 0x555a1bc62963 "VERSION", 0x555a1bc62998 "ATOM_PAIR", 0x555a1bc629a2 "_NET_WM_SYNC_REQUEST", 0x555a1bc629b7 "_NET_WM_SYNC_REQUEST_COUNTER", 0x555a1bc629d4 "_NET_WM_VISIBLE_NAME", 0x555a1bc629e9 "_NET_WM_VISIBLE_ICON_NAME", 0x555a1bc62a03 "_NET_SUPPORTING_WM_CHECK", 0x555a1bc62a1c "_NET_SUPPORTED", 0x555a1bc62a2b "_NET_WM_NAME", 0x555a1bc62a38 "_NET_CLOSE_WINDOW", 0x555a1bc62a4a "_NET_WM_STATE", 0x555a1bc62a58 "_NET_WM_STATE_SHADED", 0x555a1bc62a6d "_NET_WM_STATE_MAXIMIZED_HORZ", 0x555a1bc62a8a "_NET_WM_STATE_MAXIMIZED_VERT", 0x555a1bc62aa7 "_NET_WM_DESKTOP", 0x555a1bc62ab7 "_NET_NUMBER_OF_DESKTOPS", 0x555a1bc62acf "_NET_CURRENT_DESKTOP", 0x555a1bc5fc18 "_NET_WM_WINDOW_TYPE", 0x555a1bc5fc2c "_NET_WM_WINDOW_TYPE_DESKTOP", 0x555a1bc5fc48 "_NET_WM_WINDOW_TYPE_DOCK", 0x555a1bc5fce7 "_NET_WM_WINDOW_TYPE_TOOLBAR", 0x555a1bc5fc61 "_NET_WM_WINDOW_TYPE_MENU", 0x555a1bc5fc7a "_NET_WM_WINDOW_TYPE_DIALOG", 0x555a1bc5fc95 "_NET_WM_WINDOW_TYPE_NORMAL", 0x555a1bc62ae4 "_NET_WM_STATE_MODAL", 0x555a1bc62af8 "_NET_CLIENT_LIST", 0x555a1bc62b09 "_NET_CLIENT_LIST_STACKING", 0x555a1bc62b23 "_NET_WM_STATE_SKIP_TASKBAR", 0x555a1bc62b3e "_NET_WM_STATE_SKIP_PAGER", 0x555a1bc62b57 "_NET_WM_ICON_NAME", 0x555a1bc62b69 "_NET_WM_ICON", 0x555a1bc62b76 "_NET_WM_ICON_GEOMETRY", 0x555a1bc62b8c "_NET_WM_MOVERESIZE", 0x555a1bc62b9f "_NET_ACTIVE_WINDOW", 0x555a1bc62bb2 "_NET_WM_STRUT", 0x555a1bc62bc0 "_NET_WM_STATE_HIDDEN", 0x555a1bc5fcb0 "_NET_WM_WINDOW_TYPE_UTILITY", 0x555a1bc5fccc "_NET_WM_WINDOW_TYPE_SPLASH", 0x555a1bc62bd5 "_NET_WM_STATE_FULLSCREEN", 0x555a1bc62bee "_NET_WM_PING", 0x555a1bc62bfb "_NET_WM_PID", 0x555a1bc62c07 "_NET_WORKAREA", 0x555a1bc62c15 "_NET_SHOWING_DESKTOP", 0x555a1bc62c2a "_NET_DESKTOP_LAYOUT", 0x555a1bc62c3e "_NET_DESKTOP_NAMES", 0x555a1bc62c51 "_NET_WM_ALLOWED_ACTIONS", 0x555a1bc62c69 "_NET_WM_ACTION_MOVE", 0x555a1bc62c7d "_NET_WM_ACTION_RESIZE", 0x555a1bc62c93 "_NET_WM_ACTION_SHADE", 0x555a1bc62ca8 "_NET_WM_ACTION_STICK", 0x555a1bc62cbd "_NET_WM_ACTION_MAXIMIZE_HORZ", 0x555a1bc62cda "_NET_WM_ACTION_MAXIMIZE_VERT", 0x555a1bc62cf7 "_NET_WM_ACTION_CHANGE_DESKTOP", 0x555a1bc62d15 "_NET_WM_ACTION_CLOSE", 0x555a1bc62d2a "_NET_WM_STATE_ABOVE", 0x555a1bc62d3e "_NET_WM_STATE_BELOW", 0x555a1bc62d52 "_NET_STARTUP_ID", 0x555a1bc62d62 "_NET_WM_STRUT_PARTIAL", 0x555a1bc62d78 "_NET_WM_ACTION_FULLSCREEN", 0x555a1bc62d92 "_NET_WM_ACTION_MINIMIZE", 0x555a1bc62daa "_NET_FRAME_EXTENTS", 0x555a1bc62dbd "_NET_REQUEST_FRAME_EXTENTS", 0x555a1bc62dd8 "_NET_WM_USER_TIME", 0x555a1bc618f0 "_NET_WM_STATE_DEMANDS_ATTENTION", 0x555a1bc62dea "_NET_MOVERESIZE_WINDOW", 0x555a1bc62e01 "_NET_DESKTOP_GEOMETRY", 0x555a1bc62e17 "_NET_DESKTOP_VIEWPORT", 0x555a1bc62e2d "_NET_WM_USER_TIME_WINDOW", 0x555a1bc62e46 "_NET_WM_ACTION_ABOVE", 0x555a1bc62e5b "_NET_WM_ACTION_BELOW", 0x555a1bc62e70 "_NET_WM_STATE_STICKY", 0x555a1bc62e85 "_NET_WM_FULLSCREEN_MONITORS"}
        atoms = {310, 311, 308, 358, 421, 422, 423, 307, 312, 306, 38, 424, 425, 426, 427, 428, 429, 430, 431, 432, 433, 434, 435, 36, 408, 436, 437, 438, 439, 384, 335, 336, 440, 441, 363, 442, 321, 443, 324, 444, 331, 330, 318, 445, 314, 337, 381, 380, 378, 342, 339, 343, 329, 446, 447, 332, 333, 320, 319, 448, 449, 313, 450, 328, 346, 379, 327, 323, 322, 451, 452, 453, 454, 455, 456, 457, 458, 459, 460, 461, 462, 463, 325, 326, 316, 464, 465, 466, 315, 467, 347, 468, 469, 470, 471, 348, 472, 473, 334, 474}
        __FUNCTION__ = "meta_display_open"
#9  0x0000555a1bc08166 in main (argc=<optimized out>, argv=<optimized out>) at core/main.c:573
        act = {__sigaction_handler = {sa_handler = 0x555a1bc259c0 <sigterm_handler>, sa_sigaction = 0x555a1bc259c0 <sigterm_handler>}, sa_mask = {__val = {0 <repeats 16 times>}}, sa_flags = 0, sa_restorer = 0x3}
        empty_mask = {__val = {0 <repeats 16 times>}}
        meta_args = {save_file = 0x0, display_name = 0x0, client_id = 0x555a1c181eb0 "\035\b", replace_wm = 1, disable_sm = 0, print_version = <optimized out>, sync = <optimized out>, composite = <optimized out>, no_composite = <optimized out>, no_force_fullscreen = <optimized out>}
        log_domains = {0x0, 0x555a1bc686de "marco", 0x555a1bc661b8 "Gtk", 0x555a1bc661bc "Gdk", 0x555a1bc661c0 "GLib", 0x555a1bc661c5 "Pango", 0x555a1bc661cb "GLib-GObject", 0x555a1bc661d8 "GThread"}
        i = <optimized out>
        channel = <optimized out>