Subject: bug#12254: 24.2; completion fails backward-char

From: Leo <[email-masked]>
Date: Thu, 30 Aug 2012 20:05:03 +0800

On 2012-08-30 02:05 +0800, Stefan Monnier wrote:
> That's only because completion-at-point-functions is used less often so
> the bug in the above code doesn't bite as often.
> But your above completion function is already buggy in Emacs-23.4 since
> it can't complete "IG!R" to "IGNORE", whereas after adding the
> save-excursion such completion works just fine.

Thank you for this.

This isn't clear on the documentation on completion-at-point-functions.
It is a trap that one can easily fall into. I wonder if you may add a
note in the doc-string of completion-at-point-functions. Thanks.

Leo