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bug#64526: 30.0.50; jit-compilation and multiple function definitions
From: |
Andrea Corallo |
Subject: |
bug#64526: 30.0.50; jit-compilation and multiple function definitions |
Date: |
Mon, 10 Jul 2023 03:44:24 -0400 |
User-agent: |
Gnus/5.13 (Gnus v5.13) |
Stefan Monnier <monnier@iro.umontreal.ca> writes:
> Package: Emacs
> Version: 30.0.50
>
>
> Say you have a file ~/tmp/foo.el:
>
> ;; -*- lexical-binding: t; -*-
> (defun sm-foo1 (a) (list a 1))
> (defun sm-foo1 (a) (list a 2))
>
> which you byte-compile into ~/tmp/foo.elc, and then you do:
>
> emacs -Q -l ~/tmp/foo
> M-: (sm-foo1 'a) RET
>
> you'll usually get `(a 2)` (and that's what we expect). But if you enable
> native compilation and erase the `eln-cache` before trying it out you
> may get `(a 1)` because when the `.eln` file is reloaded on top of the
> `.elc` definitions, `comp--late-register-subr` will skip the second
> definition :-(
Hi Stefan,
are we sure about this? Is this reproducible?
Thanks
Andrea
> I suspect similar problems can occur when the two definitions are placed
> in different files (and those files are loaded "at the same time",
> i.e. the second file is loaded before the native-compilation of the
> first file finishes) since `comp-deferred-pending-h` does not pay
> attention to the file names. :-(
>
>
> Stefan