Hi,

On Sun, Jul 26, 2015 at 5:06 AM, Drew Neil <andrew.jr.n...@gmail.com> wrote:
> Using the same example as before, with this text:
>
>     http://example.com
>     http://example.org
>     http://example.net
>     http://example.com http://example.org http://example.net
>
> This time running the commands:
>
>     :vimgrep /http\zs:/g %
>     :cdo normal o
>
> That should create a new empty line after each match in the quickfix list.
> To my surprise this worked just fine, producing this output:
>
>     http://example.com
>
>     http://example.org
>
>     http://example.net
>
>     http://example.com http://example.org http://example.net
>
>
>
>     [eof - three blank lines before end of file]
>
> I was expecting this to suffer from a similar problem as the previous
> example. This time it’s the line numbers (not column numbers) that would
> fall out of sync with the matches. But it doesn’t happen. Here’s the
> addresses in the quickfix list before running those commands:
>
>     1 col 5
>     2 col 5
>     3 col 5
>     4 col 5
>     4 col 24
>     4 col 43
>
> After running the `:cdo normal o` command, the quickfix list contains these
> addresses:
>
>     1 col 5
>     3 col 5
>     5 col 5
>     7 col 5
>     7 col 24
>     7 col 43
>
> This suggests that the quickfix list is somehow updated between edits that
> modify the number of lines in a file. Would it be possible to update the
> quickfix list could also between edits that modify the number of characters
> in a line?
>

As I mentioned in my previous e-mail, the qf_mark_adjust() function is used
to adjust the line numbers in the quickfix list whenever a line is added or
removed from a file. But when a line is modified, the column numbers in
the quickfix list are not currently updated. This is a bug in the quickfix
functionality and needs to be fixed.

- Yegappan

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