incorrect dependancy requirement for sasl2-bin

[Kevin Chan]

Trying to install sasl2-bin on 18.04.4 LTS. received error:

The following packages have unmet dependencies:
 sasl2-bin : Depends: db-util but it is not going to be installed

Following the dependencies produced issue with db5.3-util:
db5.3-util : Depends: libdb5.3 (= 5.3.28-13.1ubuntu1) but 5.3.28-13.1ubuntu1.1 is to be installed

Had to downgrade libdb5.3 to 5.3.28-13.1ubuntu1 package in order order for sasl2-bin to install.

[Christian Ehrhardt  (paelzer)]

Hmm,
that worked for me just nice.

root@b:~# apt install sasl2-bin
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
  db-util db5.3-util
The following NEW packages will be installed:
  db-util db5.3-util sasl2-bin
0 upgraded, 3 newly installed, 0 to remove and 83 not upgraded.
Need to get 173 kB of archives.
After this operation, 680 kB of additional disk space will be used.
Do you want to continue? [Y/n] Y
Get:1 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 db5.3-util amd64 5.3.28-13.1ubuntu1.1 [65.5 kB]
Get:2 http://archive.ubuntu.com/ubuntu bionic/main amd64 db-util all 1:5.3.21~exp1ubuntu2 [2718 B]
Get:3 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 sasl2-bin amd64 2.1.27~101-g0780600+dfsg-3ubuntu2.1 [105 kB]
Fetched 173 kB in 0s (931 kB/s)
Preconfiguring packages ...
Selecting previously unselected package db5.3-util.
(Reading database ... 42814 files and directories currently installed.)
Preparing to unpack .../db5.3-util_5.3.28-13.1ubuntu1.1_amd64.deb ...
Unpacking db5.3-util (5.3.28-13.1ubuntu1.1) ...
Selecting previously unselected package db-util.
Preparing to unpack .../db-util_1%3a5.3.21~exp1ubuntu2_all.deb ...
Unpacking db-util (1:5.3.21~exp1ubuntu2) ...
Selecting previously unselected package sasl2-bin.
Preparing to unpack .../sasl2-bin_2.1.27~101-g0780600+dfsg-3ubuntu2.1_amd64.deb ...
Unpacking sasl2-bin (2.1.27~101-g0780600+dfsg-3ubuntu2.1) ...
Setting up db5.3-util (5.3.28-13.1ubuntu1.1) ...
Setting up db-util (1:5.3.21~exp1ubuntu2) ...
Setting up sasl2-bin (2.1.27~101-g0780600+dfsg-3ubuntu2.1) ...
Processing triggers for man-db (2.8.3-2ubuntu0.1) ...
Processing triggers for ureadahead (0.100.0-21) ...
Processing triggers for systemd (237-3ubuntu10.38) ..

Considering the versions you reported I see no such hard dependencies:

$ apt-cache show sasl2-bin | grep Depe
Depends: db-util, libsasl2-2 (>= 2.1.27~101-g0780600+dfsg-3ubuntu2.1), lsb-base (>= 3.0-6), debconf (>= 0.5) | debconf-2.0, libc6 (>= 2.15), libdb5.3, libkrb5-3 (>= 1.13~alpha1+dfsg), libldap-2.4-2 (>= 2.4.7), libpam0g (>= 0.99.7.1), libssl1.1 (>= 1.1.0)
Depends: db-util, libsasl2-2 (>= 2.1.27~101-g0780600+dfsg-3ubuntu2), lsb-base (>= 3.0-6), debconf (>= 0.5) | debconf-2.0, libc6 (>= 2.15), libdb5.3, libkrb5-3 (>= 1.13~alpha1+dfsg), libldap-2.4-2 (>= 2.4.7), libpam0g (>= 0.99.7.1), libssl1.1 (>= 1.1.0)
[✓]─[paelzer@Keschdeichel ~]──[119758]──[11:12 Fr Mär 06]──

$ apt-cache show db-util | grep Depe
Depends: db5.3-util

root@b:~# apt-cache show db5.3-util | grep Depen
Depends: libc6 (>= 2.14), libdb5.3 (= 5.3.28-13.1ubuntu1.1)

And that makes sense it is fine to depend on the new version of libdb5.3.

The older version of db5.3-util depended on 5.3.28-13.1ubuntu1.
It seems you wanted to install that:

Can you compare the following with your system:
root@b:~# apt-cache policy db5.3-util
db5.3-util:
  Installed: 5.3.28-13.1ubuntu1.1
  Candidate: 5.3.28-13.1ubuntu1.1
  Version table:
 *** 5.3.28-13.1ubuntu1.1 500
        500 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu bion...

[Christian Ehrhardt  (paelzer)]

FYI: here an info how current Bionic should look like:

Package: sasl2-bin
Architecture: amd64
Version: 2.1.27~101-g0780600+dfsg-3ubuntu2.1
Priority: optional
Section: utils
Source: cyrus-sasl2
Origin: Ubuntu
Maintainer: Ubuntu Developers <email address hidden>
Original-Maintainer: Debian Cyrus SASL Team <email address hidden>
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Installed-Size: 379
Depends: db-util, libsasl2-2 (>= 2.1.27~101-g0780600+dfsg-3ubuntu2.1), lsb-base (>= 3.0-6), debconf (>= 0.5) | debconf-2.0, libc6 (>= 2.15), libdb5.3, libkrb5-3 (>= 1.13~alpha1+dfsg), libldap-2.4-2 (>= 2.4.7), libpam0g (>= 0.99.7.1), libssl1.1 (>= 1.1.0)
Filename: pool/main/c/cyrus-sasl2/sasl2-bin_2.1.27~101-g0780600+dfsg-3ubuntu2.1_amd64.deb
Size: 105244
MD5sum: fa7d1c5226d6414c581fbc91b480bcde
SHA1: 6f557e33370ab710af54b86202642cb74b9a8fef
SHA256: dc8a1838442062c1841714469f828bbac2ec7e128313a7e2b8fd5187331163f8
Homepage: https://www.cyrusimap.org/
Description-en: Cyrus SASL - administration programs for SASL users database
 This is the Cyrus SASL API implementation, version 2.1. See package
 libsasl2-2 and RFC 2222 for more information.
 .
 This package contains administration programs for the SASL users
 database and common binary files for plugin modules.
Description-md5: fa33321a828f08fecd44db10c0f59feb
Supported: 5y

Package: sasl2-bin
Architecture: amd64
Version: 2.1.27~101-g0780600+dfsg-3ubuntu2
Priority: optional
Section: utils
Source: cyrus-sasl2
Origin: Ubuntu
Maintainer: Ubuntu Developers <email address hidden>
Original-Maintainer: Debian Cyrus SASL Team <email address hidden>
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Installed-Size: 379
Depends: db-util, libsasl2-2 (>= 2.1.27~101-g0780600+dfsg-3ubuntu2), lsb-base (>= 3.0-6), debconf (>= 0.5) | debconf-2.0, libc6 (>= 2.15), libdb5.3, libkrb5-3 (>= 1.13~alpha1+dfsg), libldap-2.4-2 (>= 2.4.7), libpam0g (>= 0.99.7.1), libssl1.1 (>= 1.1.0)
Filename: pool/main/c/cyrus-sasl2/sasl2-bin_2.1.27~101-g0780600+dfsg-3ubuntu2_amd64.deb
Size: 105348
MD5sum: c47e35a983733f123a2010580bf38267
SHA1: 0db50083fb2ae729497d3e4dc8447ae6ccb39a2d
SHA256: cecaba1756d51eb7f5a5e8224ae6a638d8971314b56de0c270a4ee213762adf1
Homepage: https://www.cyrusimap.org/
Description-en: Cyrus SASL - administration programs for SASL users database
 This is the Cyrus SASL API implementation, version 2.1. See package
 libsasl2-2 and RFC 2222 for more information.
 .
 This package contains administration programs for the SASL users
 database and common binary files for plugin modules.
Description-md5: fa33321a828f08fecd44db10c0f59feb
Supported: 5y

sasl2-bin:
  Installed: 2.1.27~101-g0780600+dfsg-3ubuntu2.1
  Candidate: 2.1.27~101-g0780600+dfsg-3ubuntu2.1
  Version table:
 *** 2.1.27~101-g0780600+dfsg-3ubuntu2.1 500
        500 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu bionic-security/main amd64 Packages
        100 /var/lib/dpkg/status
     2.1.27~101-g0780600+dfsg-3ubuntu2 500
        500 http://archive.ubuntu.com/ubuntu bionic/main amd64 Packages
Package: db-u...

[Launchpad Janitor (janitor)]

[Expired for cyrus-sasl2 (Ubuntu) because there has been no activity for 60 days.]