GNU bug report logs - #20625
25.0.50; doc of `define-error` is incorrect

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From: Drew Adams <drew.adams <at> oracle.com>
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: 20625 <at> debbugs.gnu.org
Subject: bug#20625: 25.0.50; doc of `define-error` is incorrect
Date: Sat, 30 Apr 2016 11:42:04 -0800 (GMT-08:00)

> > No, MESSAGE is not necessarily a string. It is a required argument, but
> > the code explicitly makes use of the case where it is nil.  And existing
> > code delivered with Emacs (e.g. bookmark.el) makes use of a nil MESSAGE.
> > That case should be documented.
> 
> The function doesn't error out if MESSAGE isn't a string, but it still
> shouldn't be.  So I don't think that's a bug.
> 
> Feel free to submit a new bug report for bookmark.el not supplying a
> string.

I think it is too bad that `define-error', which was intended to
be a friendly wrapper around using `error-conditions' directly,
will no longer do all that the latter does.  But so be it.

Bug #23408 reported, for bookmark.el.  Users who wrote
similar code, expecting `define-error' to be like using
`error-conditions', will need to likewise change their
code.

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