GNU bug report logs - #40525
inferior process on core-updates crashes: mmap(PROT_NONE) failed

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From: Christopher Baines <mail <at> cbaines.net>
To: Ludovic Courtès <ludo <at> gnu.org>, Marius Bakke <mbakke <at> fastmail.com>
Cc: 40525 <at> debbugs.gnu.org
Subject: bug#40525: inferior process on core-updates crashes: mmap(PROT_NONE) failed
Date: Fri, 17 Apr 2020 18:34:55 +0100

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Ludovic Courtès <ludo <at> gnu.org> writes:

> Glad you manage to get more info.
>
> Christopher Baines <mail <at> cbaines.net> skribis:
>
>> Following up on this, I've built Guile on core-updates with libgc <at> 7
>> rather than libgc <at> 8 (which is what's used above), and I can't reproduce
>> the issue. So, I'm getting more certain that this is a regression which
>> the libgc upgrade has led to.
>
> Bah.  :-/
>
> We noticed similar issues with libgc <at> 8 earlier but it seemed to be
> fixed:
>
>   https://debbugs.gnu.org/cgi/bugreport.cgi?bug=36812
>
>> Would it be feasible to keep guile, or at least the guile Guix uses with
>> libgc <at> 7 for now?
>
> Yes, we can define a Guile variant in (gnu packages guile) and have
> (guix self) refer to it.

I've sent a patch which I think does this now [1]. Assuming I've done
the right thing, is this something that can be merged in to core-updates
Marius?

1: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=40684

I've tested the patch by running:

  ./pre-inst-env guile build-aux/compile-as-derivation.scm "$PWD"

Then taking the Guix I get, and trying the script to reproduce the issue
through the guix repl, and it seems to work.

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