Re: Async package.el

[Artur Malabarba]

> Using a second Emacs runs the risk that it's not the same version as the
> running Emacs. How likely is that to happen? For instance, the only Emacs in
> my path is not the one I'm typing this in.

Your system path is irrelevant in this scenario. Emacs can tell the
full filename of the executable that's running it with
`(expand-file-name invocation-name invocation-directory)', and that is
what we would use to run the second instance.

The only situation where they can diverge is if the Emacs executable
was recompiled while the current one is running, and then we could add
some form of version check to protect against it.