GNU bug report logs - #62504
30.0.50; SEGFAULT On M-x

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Stefan Kangas <stefankangas <at> gmail.com>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#62504: closed (30.0.50; SEGFAULT On M-x)
Date: Mon, 11 Sep 2023 23:58:02 +0000

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Your message dated Mon, 11 Sep 2023 16:56:55 -0700
with message-id <CADwFkmneZ6Tu0ET0tvthyRt0LCQJHNLvwqpCHJy+XoJOVZVMWA <at> mail.gmail.com>
and subject line Re: bug#62504: 30.0.50; SEGFAULT On M-x
has caused the debbugs.gnu.org bug report #62504,
regarding 30.0.50; SEGFAULT On M-x
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


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62504: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=62504
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From: Jacob Faibussowitsch <jacob.fai <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 30.0.50; SEGFAULT On M-x
Date: Tue, 28 Mar 2023 11:25:49 -0400

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Hello,

This bug is twofold and appears to be related to bug#62446 and bug#61917. I produce a much smaller reproducer that generates the same kind of error as bug#61917, namely `(wrong-number-of-arguments #<subr signal> 2)`. Segfaults only occur after the following commit:

commit 52b67740d10df8ca539fdc2c7d50283997683141
Author: Mattias Engdegård <mattiase <at> acm.org>
Date:   Sat Mar 25 15:38:00 2023 +0100

    Generalise a LAP optimisation rule

    * lisp/emacs-lisp/byte-opt.el (byte-optimize-lapcode):
    Accept (stack-set 1) as equivalent to (discardN-preserve-tos 1) in a
    rule previously overlooked.  This is usually beneficial in code size
    and almost always shortens dynamic paths.


Common setup:

1. mkdir repro
2. Put attached init.el and main.c inside (technically, main.c need not be in repro)

———

To reproduce bug#61917:

1. git checkout master
2. configure --with-native-compilation \
  --without-x \
  --without-ns \
  --without-compress-install \
  --with-native-compilation \
  --with-json \
  --with-tree-sitter
3. make bootstrap
4. emacs  --init-directory ../repro
5. Check messages, and ye shall find the bug message.

——— 

To reproduce segfault:

1. git checkout 52b67740d10df8ca539fdc2c7d50283997683141
2. Perform same configure and build commands as above.
3. emacs --init-directory ../repro ../repro/main.c (loading main.c is *required*, the segfault does not fire otherwise)
4. (In emacs) M-x
5. Fatal error 11: Segmentation fault

Best regards,

Jacob Faibussowitsch
(Jacob Fai - booss - oh - vitch)

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[init.el (application/octet-stream, attachment)]

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From: Stefan Kangas <stefankangas <at> gmail.com>
To: Jacob Faibussowitsch <jacob.fai <at> gmail.com>
Cc: Eli Zaretskii <eliz <at> gnu.org>, 62504-done <at> debbugs.gnu.org,
 Andrea Corallo <akrl <at> sdf.org>
Subject: Re: bug#62504: 30.0.50; SEGFAULT On M-x
Date: Mon, 11 Sep 2023 16:56:55 -0700

Jacob Faibussowitsch <jacob.fai <at> gmail.com> writes:

> Segfaults and errors are gone with this change.

It seems like this issue was fixed, but it was left open in the bug
tracker.  I'm therefore closing it now.

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