Segmentation fault on launch

[James Fox]

Ubuntu 21.04 (Canonical Gnome Desktop not flavour). Installed openbox (3.6.1-9+deb11u1) and lxappearance (0.6.3-1) from standard repos.

Launching immediately segfaults.
Rebuilding the package still segfaults.

It seems to be having issues parsing:
    /usr/share/icons/gnome/index.theme
    /usr/share/icons/DMZ-Black/index.theme

These files look normal and have correct permissions.

I added a small hack to src/icon-theme.c to ignore these files and lxappearance now works correctly but is missing these themes.

########### BACKTRACE FROM GDB
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff791179d in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
(gdb) b
Breakpoint 1 at 0x7ffff791179d
(gdb) backtrace
#0 0x00007ffff791179d in () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1 0x00007ffff7911cc1 in () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x00007ffff7911f41 in () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3 0x00007ffff7912079 in g_key_file_load_from_file () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4 0x000055555555d5d4 in load_icon_themes_from_dir
    (base_dir=0x55555570c180 "/usr/share/icons", theme_dir=0x55555570c180 "/usr/share/icons", kf=0x55555570d990) at icon-theme.c:84
#5 0x000055555555d92a in load_icon_themes () at icon-theme.c:125
#6 icon_theme_init (b=b@entry=0x5555555d49c0) at icon-theme.c:247
#7 0x000055555555ab0e in main (argc=<optimised out>, argv=<optimised out>) at lxappearance.c:663

########### HACK TO FIX ISSUE
--- lxappearance-0.6.3.orig/src/icon-theme.c
+++ lxappearance-0.6.3/src/icon-theme.c
@@ -81,7 +81,15 @@ void load_icon_themes_from_dir(const cha
                 theme->base_dir = base_dir;
                 theme->is_removable = (0 == access(base_dir, W_OK));

+ // printf("%s\n", index_theme);
+ if (strcmp(index_theme, "/usr/share/icons/gnome/index.theme") == 0)
+ continue;
+
+ if (strcmp(index_theme, "/usr/share/icons/DMZ-Black/index.theme") == 0)
+ continue;
+
                 if(g_key_file_load_from_file(kf, index_theme, 0, NULL))
                 {
                     /* skip hidden ones */
                     if(!g_key_file_get_boolean(kf, "Icon Theme", "Hidden", NULL))