Hah, thank you! That's what I get with fiddling with large integers I
suppose... Setting to a *reasonably* lower number seems to have resolved
the issue!

On Tue, Jun 8, 2021 at 2:00 PM Roman Perepelitsa <
roman.perepelitsa@gmail.com> wrote:

> On Tue, Jun 8, 2021 at 10:42 PM Jonathan Ching <jon48c@gmail.com> wrote:
> >
> > It doesn't seem like the issue is resolved by 5.8. Could it be something
> else?
>
> I can reproduce this:
>
>     % docker run -e TERM -it --rm zshusers/zsh:5.8 zsh
>     7a7002248c6a# print 'HISTFILE=~/hist'              >>~/.zshrc
>     7a7002248c6a# print 'HISTSIZE=9223372036854775807' >>~/.zshrc
>     7a7002248c6a# print 'SAVEHIST=9223372036854775807' >>~/.zshrc
>     7a7002248c6a# print 'setopt incappendhistory'      >>~/.zshrc
>     7a7002248c6a# exec zsh
>     7a7002248c6a# echo 1
>     1
>     7a7002248c6a# echo 2
>     2
>     7a7002248c6a# cat ~/hist
>     echo 1
>     echo 2
>     cat ~/hist
>     7a7002248c6a# echo "
>     dquote>
>     7a7002248c6a# cat ~/hist
>     echo 1
>     cat ~/hist
>
> Replacing 9223372036854775807with mere 1000000000000000000 avoids the
> issue.
>
> From my experience with zsh source code, it doesn't bother with
> handling integer overflow, so I'm not sure how serious this bug is.
>
> Roman.
>