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Subject: |
28.0.50; xref core package 1.3.0 published, breaks etags |
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Date: |
Mon, 18 Oct 2021 10:13:04 +0000 |
This appears to be a packaging bug: The xref core package has changed
its version number from 1.2.2 to 1.3.0 in
35a752863afc9f9075473e34c395d36e0bd18bff.
The breakage happens because xref 1.3.0 has been published on GNU ELPA
https://elpa.gnu.org/packages/ (although the details page shows 1.2.2 as
the latest version, don't know why). I am using the "eglot" package,
which requires xref (at a lower minimum version), and when upgrading
packages this morning, I got xref 1.3.0.
After that, everything related to etags fell apart (company backends,
after-save hooks to regenerate tags etc) with error messages about
undefined xref-location classes (and more).
Brief analysis: The new xref version switches from eieio to
cl-defstruct, which means that older etags (not a core package) code
breaks, because it relies on the xref-location class. This seems to be
in violation of the comment in xref.el: "Avoid functionality that is not
compatible with the version of Emacs recorded above." (the version
"recorded above" is 26.1)
I am not really clear on how the "core package" idea is supposed to
work. One solution would be to "un-publish" xref 1.3.0. A more general
approach would introduce semantic versioning to package.el, and the
above change would require a version 2.0.0 in that world.
In GNU Emacs 28.0.50 (build 2, x86_64-pc-linux-gnu, GTK+ Version 3.24.24, cairo
version 1.16.0)
of 2021-09-02 built on t14s-il
Repository revision: 4c49ec7f865bdad1629d2f125f71f4e506b258f2
Repository branch: feature/pgtk
Windowing system distributor 'System Description: Debian GNU/Linux 11 (bullseye)
Configured using:
'configure --without-gsettings --with-pgtk'
Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM HARFBUZZ JPEG JSON LCMS2
LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 MODULES NOTIFY INOTIFY PDUMPER PGTK
PNG RSVG SECCOMP SOUND THREADS TIFF TOOLKIT_SCROLL_BARS XIM GTK3 ZLIB
Important settings:
value of $LANG: en_US.UTF-8
locale-coding-system: utf-8-unix
Major mode: ELisp/l
[...]
Memory information:
((conses 16 1269822 164531)
(symbols 48 46201 11)
(strings 32 209533 58772)
(string-bytes 1 7112283)
(vectors 16 94542)
(vector-slots 8 1961389 54375)
(floats 8 959 1792)
(intervals 56 129413 1921)
(buffers 992 56))
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--- Begin Message ---
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Subject: |
Re: bug#51270: 28.0.50; xref core package 1.3.0 published, breaks etags |
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Date: |
Wed, 20 Oct 2021 01:05:45 +0300 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.13.0 |
On 19.10.2021 20:10, Ingo Lohmar wrote:
On Tue, Oct 19 2021 00:40 (+0300), Dmitry Gutov wrote:
Yes, an update to a more recent emacs-28 should fix it. pgtk is indeed a
fair bit out of date.
Perhaps we could compare the version more finely to "28.0.60", to cut
off most older builds. That 3 month old version advertises itself as
"28.0.50", right?
It does, so the finer comparison should help all but very few edge
cases. Looking forward to xref-1.3.1 (or something like that)!
1.3.1 is out already, so this will be 1.3.2.
Done, and closing.
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