bug#49268: 28.0.50; emacs could not load dump file not built for this Emacs executable

[Eli Zaretskii]

[Please keep the bug address on the CC list.]

> From: Bryan O'Brien <bryan.m.obrien@gmail.com>
> Date: Tue, 29 Jun 2021 07:43:07 -0500
> 
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> I’m not completely certain.
> 
> > find . -name '*.pdmp' -exec ls -ls {} \;
> pdmp
> /Users/bobrien/src/emacs/src/emacs.pdmp
> /Users/bobrien/src/emacs/src/emacs-28.0.50.3.pdmp
> /Users/bobrien/src/emacs/src/emacs-28.0.50.2.pdmp
> /Users/bobrien/src/emacs/src/emacs-28.0.50.4.pdmp
> /Users/bobrien/src/emacs/src/bootstrap-emacs.pdmp
> /Users/bobrien/src/emacs/src/emacs-28.0.50.1.pdmp

Look at their time stamps, and compare with that of the Emacs
executable.

Also, I don't understand why you see the .1, .2, .3, etc. suffixes
there: they aren't supposed to be in the installed directories.

> I assume src/emacs.pdmp is loaded when I execute 
>       ./src/emacs -Q (same directory).
> 
> Is it also safe to assume that when I execute 
>       ./nextstep/Emacs.app/Contents/MacOS/Emacs -Q 
> That Emacs is loading the Emacs.pdmp file in the same directory?

Yes, if Emacs finds a .pdmp file right next to its executable, it
tries to use it.

> I believe, during the make install, somehow the Emacs.pdmp gets copied into 
> the libexec directory, but an invalid Emacs.pdmp stays in the parent 
> directory of libexec.

Yes, and that invalid (old) file should be removed by hand.