GNU bug report logs - #79742
`package-dir-info` in `master` looks up package descriptors recursively, which breaks existing tools

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Paul Pogonyshev <pogonyshev <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: `package-dir-info` in `master` looks up package descriptors
 recursively, which breaks existing tools
Date: Fri, 31 Oct 2025 20:50:11 +0100

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The original commit that caused this:

    b81f937e60b Do a deep-copy when installing a package from a local
package

The second hunk touches `package-dir-info`. As I understand from Spencer
Baugh's comments, it's actually not needed to address the initial problem,
but instead it actually causes regression in real world.

This has long been discussed on Emacs-devel, starting here:
https://lists.gnu.org/archive/html/emacs-devel/2025-08/msg00332.html

Some particularly relevant emails:
* https://lists.gnu.org/archive/html/emacs-devel/2025-08/msg00656.html
(contains a test case)
* https://lists.gnu.org/archive/html/emacs-devel/2025-08/msg00657.html
* https://lists.gnu.org/archive/html/emacs-devel/2025-09/msg00122.html

It has been suggested to me that creating a bug might help to get a fix
committed sooner.

Paul

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