#include <xkb.h>
#include <stdlib.h>
#include <stdio.h>

int main() {
	xcb_connection_t *connection = xcb_connect(NULL, NULL);
	xcb_xkb_use_extension_unchecked(connection, XCB_XKB_MAJOR_VERSION, XCB_XKB_MINOR_VERSION);

   xcb_xkb_get_map_cookie_t map_cookie;
    xcb_xkb_get_map_reply_t *map_reply;
    xcb_generic_error_t *map_error = 0;

    map_cookie = xcb_xkb_get_map(connection,
                                 XCB_XKB_ID_USE_CORE_KBD,
                                 XCB_XKB_MAP_PART_VIRTUAL_MOD_MAP |
                                 XCB_XKB_MAP_PART_KEY_TYPES |
                                 XCB_XKB_MAP_PART_KEY_SYMS |
                                 XCB_XKB_MAP_PART_EXPLICIT_COMPONENTS |
                                 XCB_XKB_MAP_PART_KEY_ACTIONS |
                                 XCB_XKB_MAP_PART_KEY_BEHAVIORS |
                                 XCB_XKB_MAP_PART_VIRTUAL_MODS |
                                 XCB_XKB_MAP_PART_MODIFIER_MAP,
                                 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0); // hmm

    map_reply = xcb_xkb_get_map_reply(connection, map_cookie, &map_error);
    if (map_error) {
        free(map_error);
        return -1;
    }

    const xcb_xkb_get_map_map_t *map = (xcb_xkb_get_map_map_t *)xcb_xkb_get_map_map(map_reply);

    xcb_xkb_key_v_mod_map_iterator_t iter = xcb_xkb_get_map_map_vmodmap_rtrn_iterator(map_reply, map);
    printf("reply %p, map %p, iter %p\n", map_reply, map, iter.data);

    xcb_keycode_t key = 0;
    while (iter.rem) {
	    printf("iter.data %p\n", iter.data);
        if (iter.data) {
            key = iter.data->keycode; // <----- CRASH
            xcb_xkb_key_v_mod_map_next(&iter);
        }
    }

    return key;
}