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bug#62504: 30.0.50; SEGFAULT On M-x
From: |
Andrea Corallo |
Subject: |
bug#62504: 30.0.50; SEGFAULT On M-x |
Date: |
Wed, 29 Mar 2023 08:49:52 +0000 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) |
Eli Zaretskii <eliz@gnu.org> writes:
>> From: Jacob Faibussowitsch <jacob.fai@gmail.com>
>> Date: Tue, 28 Mar 2023 11:25:49 -0400
>>
>> 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@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
>
> Thanks.
>
> Andrea, maybe this will help you investigate the issue.
Yep, noted thanks.
Andrea