* lisp/tab-bar.el ([tab-bar]): Use 'make-sparse-keymap' instead of 'ignore'.

This helps to avoid the error in 'where-is-internal' that should
not call :filter unnecessarily (bug#9923).

lisp/tab-bar.el

@@ -416,7 +416,7 @@ at the mouse-down event to the position at mouse-up event."
   "S-<wheel-right>" #'tab-bar-move-tab)
 
 (global-set-key [tab-bar]
-                `(menu-item ,(purecopy "tab bar") ignore
+                `(menu-item ,(purecopy "tab bar") ,(make-sparse-keymap)
                             :filter tab-bar-make-keymap))
 
 (defun tab-bar-make-keymap (&optional _ignore)