Why does `setenv` & thus `addenv` discard the `cmd`'s `dir`?

[singularitti]

When I run setenv or addenv, I was expecting its dir does not change in this process since the only thing I want to change is ENV. But it turns out dir is cleared after a setenv or an addenv:

julia> Cmd(`ls`; dir = "/usr/local").dir
"/usr/local"

julia> setenv(Cmd(`ls`; dir = "/usr/local")).dir
""

julia> addenv(Cmd(`ls`; dir = "/usr/local")).dir
""

However, I found the flag ignorestatus is inherited:

julia> Cmd(`ls`, dir = "/usr/local/bin", ignorestatus=true).ignorestatus
true

julia> setenv(Cmd(`ls`, dir = "/usr/local/bin", ignorestatus=true), ENV).ignorestatus
true

Should we let dir in setenv & addenv defaults to cmd.dir?

setenv(command::Cmd, env; dir=command.dir)

julia> versioninfo()
Julia Version 1.6.2
Commit 1b93d53fc4 (2021-07-14 15:36 UTC)

[StefanKarpinski]

@Keno, I assume this is unintentional?

[vtjnash]

Seems to have been an oversight in dee7f6c, when the argument was added