Copying a whole line using kill-ring-save in emacs 24.3.1

[Alan <bowl.of.petunias@gmail.com>]

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Hi,

I've used the following code, from
http://www.emacswiki.org/emacs/WholeLineOrRegion, to copy a whole line:

(put 'kill-ring-save 'interactive-form
     '(interactive
       (if (use-region-p)
           (list (region-beginning) (region-end))
         (list (line-beginning-position) (line-beginning-position 2)))))


Basically, it allows the use of "meta-w" to copy the entire line where the
cursor is currently located, as long as no text is visually selected.
(Transient Mark Mode must be enabled for this to work.) However, after
upgrading to emacs version 24.3.1 (from 24.2.1), this fails to work.

When I visit a file for the first time and hit "meta-w", I get the error:
“Wrong type argument: integer-or-marker-p, nil”, although it does
successfully copy the line. However, further “meta-w” presses copy from the
current position to the last mark, regardless of whether the region is
highlighted.

Any thoughts on getting the “Meta-w” to work? Thanks.

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