'ignore hides \r in keymap

[Lennart Borgman]

This is one of those strange errors I wish I did not see. It seems like 
'ignore somehow hides \r in a keymap. To show this start with "emacs -Q" 
and evaluate the following:

 ;; Set up
 (defconst km (make-sparse-keymap))
 (define-key km "\r"   (lambda()(interactive)(message "hit RET")))

 ;; Convinience switching to/from km
 (define-key km [(home)] (lambda()(interactive)(use-local-map nil)))
 (global-set-key [(control meta home)] 
(lambda()(interactive)(use-local-map km)))

 ;; Test using either of these and then hit RET
 (define-key km [?i] (lambda()(interactive)(define-key km '[t] 'ignore)))
 (define-key km [?n] (lambda()(interactive)(define-key km '[t] nil)))

Activate the km keymap with C-M-home. Switch between using 'ignore or 
nil for unbound keys in km by hitting i and n. I see the following:

- Using nil and hitting RET gives the message "hit RET"
- Using 'ignore and hitting RET gives nothing.

I am doing this with CVS Emacs from 2005-10-27 on w32.