Bug#1091649: Cannot debootstrap sid after usrmerge removal: E: Couldn't find these debs: usr-is-merged

[Andrey Rakhmatullin <wrar@debian.org>]

Package: debootstrap
Version: 1.0.138
Severity: grave

usrmerge was removed from unstable yesterday. debootstrap tries to install usr-
is-merged and fails:

I: Retrieving Packages
I: Validating Packages
I: Resolving dependencies of required packages...
I: Resolving dependencies of base packages...
I: Checking component main on http://deb.debian.org/debian...
E: Couldn't find these debs: usr-is-merged


The cause is in /usr/share/debootstrap/scripts/debian-common:



    # On suites >= bookworm, either we set up a merged-/usr system
    # via merge_usr, or we deliberately avoid that migration by creating
    # the flag file. This means there's no need for the live migration
    # 'usrmerge' package and its extra dependencies:
    # we can install the empty 'usr-is-merged' metapackage to indicate
    # that the transition has been done.
    case "$CODENAME" in
        etch*|lenny|squeeze|wheezy|jessie*|stretch|buster|bullseye)
            ;;
        *)
            required="$required usr-is-merged"
            EXCLUDE_DEPENDENCY="$EXCLUDE_DEPENDENCY usrmerge"
            ;;
    esac


-- System Information:
Debian Release: trixie/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'testing-debug'), (500, 'unstable'), (500, 'testing'), (101, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.11.10-amd64 (SMP w/16 CPU threads; PREEMPT)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=ru_RU.UTF-8, LC_CTYPE=ru_RU.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages debootstrap depends on:
ii  distro-info  1.12
ii  wget         1.24.5-2+b1

Versions of packages debootstrap recommends:
ii  arch-test               0.21-1.1
ii  debian-archive-keyring  2023.4
ii  gnupg                   2.2.45-2
ii  mount                   2.40.2-13

Versions of packages debootstrap suggests:
ii  binutils                2.43.50.20241221-1
pn  squid-deb-proxy-client  <none>
pn  ubuntu-archive-keyring  <none>
ii  xz-utils                5.6.3-1+b1
ii  zstd                    1.5.6+dfsg-1+b1

-- debconf-show failed