[Bug 1973149] [NEW] system uses merged-usr-via-aliased-dirs, going behind dpkg's back, breaking its core assumptions

[madigal]

Public bug reported:

Got this warning on Kinetic, Mate flavor:

Paramétrage de dpkg (1.21.7ubuntu3) ...
dpkg: warning:

 This system uses merged-usr-via-aliased-dirs, going behind dpkg's
back, breaking its core assumptions. This can cause silent file
overwrites and disappearances, and its general tools misbehavior.

 See <https://wiki.debian.org/Teams/Dpkg/FAQ#broken-usrmerge>.
--- 
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu82
Architecture: amd64
CasperMD5CheckResult: unknown
DistroRelease: Ubuntu 22.10
Package: dpkg 1.21.7ubuntu3
PackageArchitecture: amd64
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 5.15.0-30.31-generic 5.15.30
Tags: kinetic package-from-proposed third-party-packages
Uname: Linux 5.15.0-30-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: N/A
_MarkForUpload: True

** Affects: dpkg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-collected kinetic package-from-proposed third-party-packages

** Tags added: kinetic

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https://bugs.launchpad.net/bugs/1973149

Title:
  system uses merged-usr-via-aliased-dirs, going behind dpkg's  back,
  breaking its core assumptions

Status in dpkg package in Ubuntu:
  New

Bug description:
  Got this warning on Kinetic, Mate flavor:

  Paramétrage de dpkg (1.21.7ubuntu3) ...
  dpkg: warning:

   This system uses merged-usr-via-aliased-dirs, going behind dpkg's
  back, breaking its core assumptions. This can cause silent file
  overwrites and disappearances, and its general tools misbehavior.

   See <https://wiki.debian.org/Teams/Dpkg/FAQ#broken-usrmerge>.
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.11-0ubuntu82
  Architecture: amd64
  CasperMD5CheckResult: unknown
  DistroRelease: Ubuntu 22.10
  Package: dpkg 1.21.7ubuntu3
  PackageArchitecture: amd64
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=fr_FR.UTF-8
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 5.15.0-30.31-generic 5.15.30
  Tags: kinetic package-from-proposed third-party-packages
  Uname: Linux 5.15.0-30-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: N/A
  _MarkForUpload: True

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