forbidden Vala naming

int main()
{
    goto (33);
    return 0;
}

void goto (int val){}

/*
/home/yannick/Documents/main.vala.c:12:6: error: expected identifier or ‘(’ before ‘goto’
 void goto (gint val);
      ^
/home/yannick/Documents/main.vala.c: In function ‘_vala_main’:
/home/yannick/Documents/main.vala.c:17:7: error: expected identifier or ‘*’ before ‘(’ token
  goto (33);
       ^
/home/yannick/Documents/main.vala.c: In function ‘main’:
/home/yannick/Documents/main.vala.c:24:2: warning: ‘g_type_init’ is deprecated (declared at /usr/include/glib-2.0/gobject/gtype.h:669) [-Wdeprecated-declarations]
  g_type_init ();
  ^
/home/yannick/Documents/main.vala.c: At top level:
/home/yannick/Documents/main.vala.c:29:6: error: expected identifier or ‘(’ before ‘goto’
 void goto (gint val) {
      ^
error: cc exited with status 256
Compilation failed: 1 error(s), 0 warning(s)

*/