bug#12490: 24.2; Search inside Minibuffer don't work with M-x (M-x C-s)

[Juri Linkov <juri@jurta.org>]

> I want to report, that most used function stop working in Emacs 24
> (tested 2 versions 24.1.1 and latest 24.2.1). I use Search in
> Mini buffer a lot (don't know if people use it or not). If you call
> search C-s when inside minibuffer like C-h f C-s you can search the
> content of Minibuffer like search for functions or for buffer name to
> switch like C-x b C-s (better then ido mode). And in Emacs 24 M-x C-s
> stop working so I you can't search for interactive function to execute
> anymore. It was working in 23.3 provided by Ubuntu (package
> 23.3+1-1ubuntu4).

Sorry, this feature has been removed by http://debbugs.gnu.org/5214
and http://debbugs.gnu.org/5364

But it's easy to restore it with a simple patch that prepends the
current default value (a command at point) to the sorted list of
all available command names:

=== modified file 'lisp/simple.el'
--- lisp/simple.el	2012-09-22 20:53:16 +0000
+++ lisp/simple.el	2012-09-22 23:20:41 +0000
@@ -1352,9 +1352,15 @@ (defun read-extended-command ()
 	     (lambda ()
 	       ;; Get a command name at point in the original buffer
 	       ;; to propose it after M-n.
-	       (with-current-buffer (window-buffer (minibuffer-selected-window))
-		 (and (commandp (function-called-at-point))
-		      (format "%S" (function-called-at-point)))))))
+	       (let ((def (with-current-buffer
+			      (window-buffer (minibuffer-selected-window))
+			    (and (commandp (function-called-at-point))
+				 (format "%S" (function-called-at-point)))))
+		     (all (sort (minibuffer-default-add-completions)
+				(lambda (a b) (string< a b)))))
+		 (if def
+		     (cons def (delete def all))
+		   all)))))
     ;; Read a string, completing from and restricting to the set of
     ;; all defined commands.  Don't provide any initial input.
     ;; Save the command read on the extended-command history list.