bug#53497: 29.0.50; native-compile after restarting Emacs

[Eli Zaretskii]

> From: Arash Esbati <arash@gnu.org>
> Cc: Andrea Corallo <akrl@sdf.org>,  larsi@gnus.org,  53497@debbugs.gnu.org
> Date: Mon, 24 Jan 2022 18:17:26 +0100
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > Let's see.  Arash, could you please try reverting commits 6a79de5 and
> > 9396b7d, install the Emacs you build without those two, and see if the
> > problem goes away?
> 
> I checked out 1476b0d7a6 (which was the last commit before the two
> above) and built Emacs twice: Once with my original recipe (pass prefix
> to make install) and once passing --prefix to configure.  No avail with
> both versions.

OK, thanks.

So I think the only way to make progress here is to run Emacs under
GDB, with a breakpoint in maybe_defer_native_compilation, and if and
when it breaks, see what goes on there.  In general, this breakpoint
should break as soon as you invoke some command that loads a .elc file
for which there's no corresponding .eln file.

I hope your Emacs is not stripped of debugging symbols; if it is,
please rebuild and install without stripping and with -g3 switch, and
run the resulting executable under GDB as described above.