You're not asking for the output of getmatches(), are you? Or are you
talking about debugging in gdb? I haven't found any way to query match
positions from within vim.

The repro case I'm using now is

vim -c "highlight def link RightMargin Error | exec ('match RightMargin
/\%<42v.\%>41v/')" SOMEFILE

So you don't need any plugins to verify.

David


On Sat, Aug 9, 2014 at 4:08 AM, Bram Moolenaar <[email protected]> wrote:

>
> David Barnett wrote:
>
> > Looks like it's patch 7.4.362:
> >
> > Problem:    When matchaddpos() uses a length smaller than the number of
> > bytes
> >     in the (last) character the highlight continues until the end of
> >     the line.
> > Solution:   Change condition from equal to larger-or-equal.
> > Files:     src/screen.c
> >
> >
> > It's a very small change but apparently problematic. Can it be reverted
> or
> > rethought?
>
> I'm glad you could pinpoint it.  I assumed that when the condition
> evaluates to true the match information would be updated.  But perhaps
> that doesn't happen in this case and it searches for a match every time.
>
> Needs some debugging to figure out what happens.  What matches does this
> plugin add when it's slow?
>
> --
> "How is your new girlfriend?"
> "90-60-90 man!"
> "What, pale purple?"
>
>  /// Bram Moolenaar -- [email protected] -- http://www.Moolenaar.net
> \\\
> ///        sponsor Vim, vote for features -- http://www.Vim.org/sponsor/
> \\\
> \\\  an exciting new programming language -- http://www.Zimbu.org
>  ///
>  \\\            help me help AIDS victims -- http://ICCF-Holland.org
>  ///
>

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