gv bug?

To replicate

$ vi -u NONE
:r !jot 15

(or use `seq 15` to get the numbers 1-15 in your file)

3GVG:g/5/d

This should delete lines 5 and 15 because they contain a "5".
However, issueing

gv

does not reselect the text. If instead you have 16 numbers

$ vim -u NONE
:r !jot 16

and do

3GVGk:g/5/d

(selecting through the penultimate line, so the same text selected
as before, followed by the same command, just with a line below '>
containing "16") followed by

gv

it works, adjusting the '> mark to the line containing "16". So
there's clearly some "the last line of my visual range was deleted,
so we need to adjust it" logic, but it doesn't seem to check if that
adjusment runs of the end of the file and back it off instead.

Thanks!

-tim

(brought to my attention in this thread
https://www.reddit.com/r/vim/comments/htfc78/vimscript_deletion_inside_visual_selection/
where it caused some odd edge-cases)


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