[Aptitude-devel] Bug#934541: aptitude: upgraded a package to experimental without notice, though SolutionCost has "safety" first

[Vincent Lefevre]

Control: found -1 0.8.13-7

Still the same bug (or similar). A bundle is available at

  https://vinc17.net/aptitude-20250318.bundle

for a limited time.

To reproduce, at

  --\ editors        Text editors and word processors (2)
    --\ main           The main Debian archive (2)
i A emacs-bin-common           1:30.1+1-4               1:30.1+1-4+b1
i   emacs-gtk                  1:30.1+1-4               1:30.1+1-4+b1

type '+' over "main", then type '.' until an upgrade is proposed
without removals:

[6(6)/...] Actions: 1 install, 2 upgrades

then type '!' and 'g'. The following is proposed:

--\ Packages to be upgraded (2)
iuA emacs-bin-common +1024 B   1:30.1+1-4               1:30.1+1-4+b1
iu  emacs-gtk        -4096 B   1:30.1+1-4               1:30.1+1-4+b1
--\ Packages being automatically installed to satisfy dependencies (1)
piA libtree-sitter0. +219 kB   <none>                   0.22.6-5

Then type [Enter] over libtree-sitter0.:

         Packages                   Preview            libtree-sitter0.22 info
aptitude 0.8.13 @ disset                 Disk: +216 kB           DL: 0 B/7998 kB
piA --\ libtree-sitt +219 kB   <none>                   0.22.6-5
[...]
  Origin: Debian:experimental [amd64]

That's from experimental!

Same issue if I type '+' over "emacs-gtk" instead of "main".

apt does not have this issue:

disset:~> apt install -s emacs-gtk
[...]
Upgrading:                      
  emacs-bin-common  emacs-gtk

Installing dependencies:
  libtree-sitter0.22

REMOVING:
  libtree-sitter0

Summary:
  Upgrading: 2, Installing: 1, Removing: 1, Not Upgrading: 64
Inst emacs-gtk [1:30.1+1-4] (1:30.1+1-4+b1 Debian:unstable [amd64]) []
Inst emacs-bin-common [1:30.1+1-4] (1:30.1+1-4+b1 Debian:unstable [amd64]) []
Remv libtree-sitter0 [0.22.6-4] []
Inst libtree-sitter0.22 (0.22.6-6 Debian:unstable [amd64])
Conf emacs-gtk (1:30.1+1-4+b1 Debian:unstable [amd64])
Conf emacs-bin-common (1:30.1+1-4+b1 Debian:unstable [amd64])
Conf libtree-sitter0.22 (0.22.6-6 Debian:unstable [amd64])

i.e. it proposes libtree-sitter0.22 0.22.6-6 from unstable rather
than libtree-sitter0.22 0.22.6-5 from experimental.

Note that since libtree-sitter0.22 0.22.6-6 has

  Replaces: libtree-sitter0 (<< 0.22.6-5~)

the removal of libtree-sitter0 is safe.

Note also that aptitude does not give any warning at any time about
the upgrade to experimental (even when typing 'g' later).

-- 
Vincent Lefèvre <vincent at vinc17.net> - Web: <https://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / Pascaline project (LIP, ENS-Lyon)