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From: Leo <sdl.web@gmail.com>
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Subject: Re: Fancy completion
Date: Mon, 30 Aug 2010 18:03:41 +0100
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In-Reply-To: <m34oecrqza.fsf@quimbies.gnus.org> (Lars Magne Ingebrigtsen's
	message of "Mon, 30 Aug 2010 18:43:21 +0200")
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On 2010-08-30 17:43 +0100, Lars Magne Ingebrigtsen wrote:
> Julien Danjou <julien@danjou.info> writes:
>
>> Using `ido-completing-read' instead of `completing-read' if a user set
>> gnus-use-ido' to t would be a good solution.
>
> Hm...  I just tried replacing completing-read with the ido method, and
> I got a backtrace.  So it wants a list instead of an obarray, but that's
> easily enough fixed:
>
> Debugger entered--Lisp error: (wrong-type-argument listp [nntp+news\.gmane\.org:gmane\.comp\...
>   reverse([nntp+news\.gmane\.org:gmane\.comp\.ide\.anjuta\.us/...
>   ido-set-matches()
>   ido-read-internal(list "Group: " gnus-group-history nil nil nil)
>   ido-completing-read("Group: " [nnt...

ido-completing-read doesn't support obarray etc. The doc-string says:

   CHOICES is a list of strings which are the possible completions.

Leo