bug#64311: [PATCH] Fix shell-dirtrack-mode showing up as enabled in unrelated buffers

[Eli Zaretskii]

> From: Vladimir Sedach <vas@oneofus.la>
> Cc: 64311@debbugs.gnu.org
> Date: Wed, 28 Jun 2023 10:43:35 -0600
> 
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > So if we make it also buffer-local, the problem is gone, no?
> 
> --8<---------------cut here---------------start------------->8---
> (local-variable-if-set-p 'shell-dirtrackp)
> t
> --8<---------------cut here---------------end--------------->8---
> 
> shell-dirtrackp is already buffer-local. Aliased variables share that 
> property.

So what exactly is the problem now?  You said:

> The problem is shell-dirtrackp and its default value.

But if this is buffer-local, then why is it a problem that it's
non-nil?