[dann@ics.uci.edu: partial-completion-mode error]

[Richard Stallman <rms@gnu.org>]

Would someone please DTRT and ack?

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To: emacs-pretest-bug@gnu.org
From: Dan Nicolaescu <dann@ics.uci.edu>
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Date: Fri, 04 Aug 2006 18:26:36 -0700
Subject: partial-completion-mode error
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Doing:

emacs -q
M-x partial-completion-mode RET

C-x C-f /usr/share/X11/xkb/symbols/pc TAB TAB

I get an error: Wrong type argument: sequencep, t

The error seems to be thrown by the `aref' in the following code in
PC-do-completion because `prefix' is nil:

	    (if (and (not (eq mode 'help))
		     (setq prefix (try-completion (PC-chunk-after basestr skip) (mapcar 'list poss))))
		(let ((first t) i)
		  ;; Retain capitalization of user input even if
		  ;; completion-ignore-case is set.
		  (if (eq mode 'word)
		      (setq prefix (PC-chop-word prefix basestr)))
		  (goto-char (+ beg (length dirname)))
		  (while (and (progn
				(setq i 0) ; index into prefix string
				(while (< i (length prefix))
				  (if (and (< (point) end)
					   (eq (downcase (aref prefix i))
					       (downcase (following-char))))
				      ;; same char (modulo case); no action


The /usr/share/X11/xkb/symbols/ contains besides the "pc" file a "pc~"
file. If the "pc~" file is not present, no error is generated. 

Can somebody please take a look at this? 

Thanks
        --dan


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