GNU bug report logs - #4807
23.1.50; Unhelpful user visible type error in transpose-lines

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Message #5 received at submit <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Geoff Gole <geoffgole <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 23.1.50; Unhelpful user visible type error in transpose-lines
Date: Mon, 26 Oct 2009 18:30:53 +0800

With an argument of 0, transpose-lines will swap the lines that point
and mark are in. In a fresh buffer in which mark has not yet been set
this will result in a type error:

   (wrong-type-argument integer-or-marker-p nil)

This isn't very helpful to the user. exchange-point-and-mark fails in
the same conditions with the much clearer phrasing "No mark set in
this buffer", perhaps transpose-lines should copy that.

Message #10 received at 4807-done <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Juanma Barranquero <lekktu <at> gmail.com>
To: Geoff Gole <geoffgole <at> gmail.com>
Cc: 4807-done <at> debbugs.gnu.org
Subject: Re: bug#4807: 23.1.50; Unhelpful user visible type error in 
	transpose-lines
Date: Mon, 26 Oct 2009 15:59:39 +0100

On Mon, Oct 26, 2009 at 11:30, Geoff Gole <geoffgole <at> gmail.com> wrote:

> This isn't very helpful to the user. exchange-point-and-mark fails in
> the same conditions with the much clearer phrasing "No mark set in
> this buffer", perhaps transpose-lines should copy that.

Fixed, thanks.

    Juanma

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