package left in uninstallable state, due to "phased 20%"

[Bram Stolk]

My system has been left unable to install libpulse-dev because the staging has caused a dead-lock.

The maintainer of libpulse has instructed me to open a bug against apt.

See: https://answers.launchpad.net/ubuntu/+source/pulseaudio/+question/699828

libpulse-dev wants a matched libpulse0 which is impossible.

This is on Ubuntu 21.10 impish-updates

There never was a non-ubuntu apt source in the config.

The apt db is up to date.

The system is up to date.

xander@gamer2:~$ sudo apt install libpulse-dev
[sudo] password for xander:
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help resolve the situation:

The following packages have unmet dependencies:
 libpulse-dev : Depends: libpulse0 (= 1:15.0+dfsg1-1ubuntu2) but 1:15.0+dfsg1-1ubuntu2.1 is to be installed
                Depends: libpulse-mainloop-glib0 (= 1:15.0+dfsg1-1ubuntu2) but 1:15.0+dfsg1-1ubuntu2.1 is to be installed
E: Unable to correct problems, you have held broken packages.
xander@gamer2:~$ apt-cache policy libpulse0
libpulse0:
  Installed: 1:15.0+dfsg1-1ubuntu2.1
  Candidate: 1:15.0+dfsg1-1ubuntu2.1
  Version table:
     1:15.0+dfsg1-1ubuntu2.2 1 (phased 20%)
        500 http://ca.archive.ubuntu.com/ubuntu impish-updates/main amd64 Packages
 *** 1:15.0+dfsg1-1ubuntu2.1 100
        100 /var/lib/dpkg/status
     1:15.0+dfsg1-1ubuntu2 500
        500 http://ca.archive.ubuntu.com/ubuntu impish/main amd64 Packages
xander@gamer2:~$ apt-cache policy libpulse-dev
libpulse-dev:
  Installed: (none)
  Candidate: 1:15.0+dfsg1-1ubuntu2
  Version table:
     1:15.0+dfsg1-1ubuntu2.2 1 (phased 20%)
        500 http://ca.archive.ubuntu.com/ubuntu impish-updates/main amd64 Packages
     1:15.0+dfsg1-1ubuntu2 500
        500 http://ca.archive.ubuntu.com/ubuntu impish/main amd64 Packages

[Chris Guiver (guiverc)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command only once, as it will automatically gather debugging information, in a terminal:

apport-collect 1954534

When reporting bugs in the future please use apport by using 'ubuntu-bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.

[Julian Andres Klode (juliank)]

Thanks for the bug report.

Please ignore Chris.

This is not a bug in apt. Launchpad currently does not preserve an old version when a new one is phasing, so non-installability can happen occasionally.

For more details, see bug 1929082. I'm going to mark this as a duplicate.