gtkutil.c: In function ‘xg_item_label_same_p’:
gtkutil.c:2936:37: error: use of NULL ‘utf8_label’ where non-null expected [CWE-476] [-Werror=analyzer-null-argument]
 2936 |                   && (!old_label || strcmp (utf8_label, old_label) == 0));
      |                                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  ‘xg_modify_menubar_widgets’: events 1-4
    |
    | 3424 | xg_modify_menubar_widgets (GtkWidget *menubar, struct frame *f,
    |      | ^~~~~~~~~~~~~~~~~~~~~~~~~
    |      | |
    |      | (1) entry to ‘xg_modify_menubar_widgets’
    |......
    | 3432 |   if (! list) return;
    |      |      ~
    |      |      |
    |      |      (2) following ‘false’ branch...
    | 3433 | 
    | 3434 |   cl_data = g_object_get_data (G_OBJECT (menubar), XG_FRAME_DATA);
    |      |   ~~~~~~~
    |      |   |
    |      |   (3) ...to here
    | 3435 | 
    | 3436 |   xg_update_menubar (menubar, f, &list, list, 0, val->contents,
    |      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    |      |   |
    |      |   (4) calling ‘xg_update_menubar’ from ‘xg_modify_menubar_widgets’
    | 3437 |                      select_cb, deactivate_cb, highlight_cb, cl_data);
    |      |                      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    |
    +--> ‘xg_update_menubar’: events 5-12
           |
           | 2972 | xg_update_menubar (GtkWidget *menubar,
           |      | ^~~~~~~~~~~~~~~~~
           |      | |
           |      | (5) entry to ‘xg_update_menubar’
           |......
           | 2983 |   if (! iter && ! val)
           |      |      ~
           |      |      |
           |      |      (6) following ‘false’ branch...
           | 2984 |     return;
           | 2985 |   else if (iter && ! val)
           |      |        ~~ ~
           |      |        |  |
           |      |        |  (8) following ‘false’ branch...
           |      |        (7) ...to here
           |......
           | 2998 |   else if (! iter && val)
           |      |        ~~ ~
           |      |        |  |
           |      |        |  (10) following ‘false’ branch...
           |      |        (9) ...to here
           |......
           | 3009 |   else if (xg_item_label_same_p (GTK_MENU_ITEM (iter->data), val->name))
           |      |        ~~  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
           |      |        |   |
           |      |        |   (12) calling ‘xg_item_label_same_p’ from ‘xg_update_menubar’
           |      |        (11) ...to here
           |
           +--> ‘xg_item_label_same_p’: events 13-14
                  |
                  | 2930 | xg_item_label_same_p (GtkMenuItem *witem, const char *label)
                  |      | ^~~~~~~~~~~~~~~~~~~~
                  |      | |
                  |      | (13) entry to ‘xg_item_label_same_p’
                  | 2931 | {
                  | 2932 |   char *utf8_label = get_utf8_string (label);
                  |      |                      ~~~~~~~~~~~~~~~~~~~~~~~
                  |      |                      |
                  |      |                      (14) calling ‘get_utf8_string’ from ‘xg_item_label_same_p’
                  |
                  +--> ‘get_utf8_string’: events 15-16
                         |
                         |  514 | get_utf8_string (const char *str)
                         |      | ^~~~~~~~~~~~~~~
                         |      | |
                         |      | (15) entry to ‘get_utf8_string’
                         |......
                         |  518 |   if (!str) return NULL;
                         |      |      ~
                         |      |      |
                         |      |      (16) following ‘true’ branch (when ‘str’ is NULL)...
                         |
                       ‘get_utf8_string’: event 17
                         |
                         |cc1:
                         | (17): ...to here
                         |
                  <------+
                  |
                ‘xg_item_label_same_p’: events 18-25
                  |
                  | 2932 |   char *utf8_label = get_utf8_string (label);
                  |      |                      ^~~~~~~~~~~~~~~~~~~~~~~
                  |      |                      |
                  |      |                      (18) returning to ‘xg_item_label_same_p’ from ‘get_utf8_string’
                  | 2933 |   const char *old_label = witem ? xg_get_menu_item_label (witem) : 0;
                  |      |                           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                  |      |                                   |                              |
                  |      |                                   |                              (19) following ‘true’ branch (when ‘witem’ is non-NULL)...
                  |      |                                   (20) ...to here
                  | 2934 | 
                  | 2935 |   bool is_same = (!old_label == !utf8_label
                  |      |                  ~~~~~~~~~~~~~~~~~~~~~~~~~~
                  | 2936 |                   && (!old_label || strcmp (utf8_label, old_label) == 0));
                  |      |                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                  |      |                   |                 |
                  |      |                   |                 (24) ...to here
                  |      |                   |                 (25) argument 1 (‘utf8_label’) NULL where non-null expected
                  |      |                   (21) following ‘true’ branch...
                  |      |                   (22) ...to here
                  |      |                   (23) following ‘false’ branch...
                  |
In file included from ../lib/string.h:41,
                 from lisp.h:29,
                 from gtkutil.c:36:
/usr/include/string.h:140:12: note: argument 1 of ‘strcmp’ must be non-null
  140 | extern int strcmp (const char *__s1, const char *__s2)
      |            ^~~~~~
cc1: all warnings being treated as errors
make[1]: *** [Makefile:386: gtkutil.o] Error 1
make[1]: Leaving directory '/home/alex/disk/dev/emacs/src'
make: *** [Makefile:443: src] Error 2