bug#57699: closed (Assertion failure "lib_child_handler != dummy_handler")

[GNU bug Tracking System]

Your message dated Fri, 9 Sep 2022 16:27:43 -0500
with message-id <c57fba64-2b84-8d77-1cfd-aa5c3ea26490@cs.ucla.edu>
and subject line Re: bug#57699: Assertion failure "lib_child_handler != 
dummy_handler"
has caused the debbugs.gnu.org bug report #57699,
regarding Assertion failure "lib_child_handler != dummy_handler"
to be marked as done.

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57699: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=57699
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--- Begin Message --- Subject: Assertion failure "lib_child_handler != dummy_handler" Date: Fri, 09 Sep 2022 10:40:09 -0400

Tags: patch

Tags: patch

Tags: patch

Recently on my Debian testing machines, my Emacs built with assertion
checks crash at startup with:

    process.c:8441: Emacs fatal error: assertion failed: lib_child_handler != 
dummy_handler

The patch below seems to fix it, but I have no idea if it's the right
thing to do.


        Stefan


In GNU Emacs 29.0.50 (build 1, x86_64-pc-linux-gnux32, GTK+ Version 3.24.34, 
cairo version 1.16.0)
 of 2022-07-19 built on alfajor
Repository revision: 1c7aefa0c5327803f32aebbdf7cfed8d21f65f96
Repository branch: work
Windowing system distributor 'The X.Org Foundation', version 11.0.12101003
System Description: Debian GNU/Linux bookworm/sid

Configured using:
 'configure -C --enable-checking --enable-check-lisp-object-type --with-modules 
--with-cairo --with-tiff=ifavailable
 'CFLAGS=-Wall -g3 -Og -Wno-pointer-sign'
 PKG_CONFIG_PATH=/home/monnier/lib/pkgconfig'

lib_child_handler.patch
Description: Text Data

--- End Message ---

> --- Begin Message ---
>
>
>
> Subject: 
>
> Re: bug#57699: Assertion failure "lib_child_handler != dummy_handler"
>
>
>
>
> Date: 
>
> Fri, 9 Sep 2022 16:27:43 -0500
>
>
>
>
> User-agent: 
>
> Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.11.0
>
>
>
>
> On 9/9/22 12:13, Lars Ingebrigtsen wrote:
> > Perhaps Paul has some comments here; added to the CCs.
>
> Stefan's patch looks good so I installed it (with my comments :-).
>
> At some point Emacs should probably use the superior method of clone3 
> with CLONE_PIDFD and waitid if available, so that it can avoid the 
> hackery and races entailed by SIGCHLD.
>
>
>
> --- End Message ---