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Re: Early backtrace.

From: Stefan Monnier
Subject: Re: Early backtrace.
Date: Mon, 10 Jan 2022 16:54:16 -0500
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux)

> So I came up with the following, which has no Lisp dependencies.  That
> is, absolutely none.  I have used it as the first Lisp file loaded,
> immediately before byte-run.el.

I have a similar hack here for the same reason ;-)
So a +1 from me (tho I'd recommend using the `debugger-` namespace
rather than `early-`).

> So, how about including this file in Emacs, amending eval.c to use it if
> backtrace.el isn't yet avaiable?  Comments and criticism are welcome.

I don't see any need for a change to `eval.c`.  Just put the

    (setq debugger #'early-debug)


    (setq debugger #'debug)

at the appropriate places inside `loadup.el`.


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