Bug#1122186: magit fails to start after trixie upgrade

[Steve McIntyre <steve@einval.com>]

Package: elpa-magit
Version: 4.3.5-1+deb13u1
Severity: important

Hi!

After upgrading a machine to trixie locally, emacs seems to be working
fine. Using it to write this mail!

But when I try to start magit using M-x magit-status, I get the
following error and no magit:

slot-missing: Invalid slot name: "#<transient-option transient-option-1037fa0c2081>", :always-read

In case it's my local config in .emacs etc. that might be causing this
problem, I've tested again with a new user with no customisations and
I still see the same issue.

Help please!

-- System Information:
Debian Release: 13.2
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.12.57+deb13-amd64 (SMP w/12 CPU threads; PREEMPT)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=en_GB:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages elpa-magit depends on:
ii  dh-elpa-helper                 2.1.9
ii  elpa-llama                     0.6.2-1
ii  elpa-magit-section             4.3.5-1+deb13u1
ii  elpa-transient                 0.8.8-1
ii  elpa-with-editor               3.4.3-1
ii  emacs                          1:30.1+1-6
ii  emacs-common [elpa-transient]  1:30.1+1-6
ii  emacs-lucid [emacs]            1:30.1+1-6
ii  emacsen-common                 3.0.8
ii  git                            1:2.47.3-0+deb13u1

elpa-magit recommends no packages.

elpa-magit suggests no packages.

-- no debconf information