Ingo Karkat wrote:
> When inserting text in insert mode via <C-R>, if the expression register
> "= is used, the start of the last changed text somehow gets reset to the
> position where the <C-R>= is triggered; i.e. any previously inserted
> text is not considered as belonging to the current insertion.
>
> vim -N -u NONE
> :let @@ = 'bar'
> :execute "normal! Ofoo\<C-r>\"\<Esc>"
> :echo getpos("'[")
> [0, 1, 1, 0] " Okay.
>
> :execute "normal! Ofoo\<C-r>=v:version\<CR>\<Esc>"
> :echo getpos("'[")
> [0, 1, 1, 0] " Okay: Vim 7.3.712 on Ubuntu 13.04/x64
> " Okay: Vim 7.3.823 on Windows 7/x64
> [0, 1, 4, 0] " BUG: Vim 7.3.1280 on Ubuntu 13.04/x64 (huge build)
>
> This regression is breaking plugins and macros; I found it while running
> my plugins' test suites.
Well, patch 7.3.1253 made CTRL-= start a new insert. Mainly to break
undo, since evaluationg the expression can make unexpected changes.
I suppose we can drop the part of the change that resets the start of
the insert.
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