I tested an upgrade from Bionic to Focal with -proposed enabled (I had to remove the disabling of -proposed in DistUpgradeController.py) and did not encounter any of the following error messages:
GLib-GObject-WARNING **: specified class size for type 'PangoCairoFcFont' is smaller than the parent type's 'PangoFcFont' class size at /usr/lib/x86_64-linux-gnu/perl5/5.30/Glib/Object/Introspection.pm line 67. GLib-GObject-CRITICAL **: g_type_add_interface_static: assertion 'G_TYPE_IS_INSTANTIATABLE (instance_type)' failed at /usr/lib/x86_64-linux-gnu/perl5/5.30/Glib/Object/Introspection.pm line 67. GLib-CRITICAL **: g_once_init_leave: assertion 'result != 0' failed at /usr/lib/x86_64-linux-gnu/perl5/5.30/Glib/Object/Introspection.pm line 67. GLib-GObject-CRITICAL **: g_object_new_valist: assertion 'G_TYPE_IS_OBJECT (object_type)' failed at /usr/lib/x86_64-linux-gnu/perl5/5.30/Glib/Object/Introspection.pm line 67. I had seen them when I tried upgrading the same virtual machine when -proposed was not enabled. Attached you'll find my apt-term.log from the successful upgrade. ** Attachment added: "apt-term.log" https://bugs.launchpad.net/ubuntu/+source/libgtk3-perl/+bug/1871960/+attachment/5357734/+files/apt-term.log ** Also affects: pango1.0 (Ubuntu) Importance: Undecided Status: New ** Changed in: pango1.0 (Ubuntu Focal) Status: New => Confirmed ** Changed in: pango1.0 (Ubuntu Focal) Importance: Undecided => Critical ** Changed in: pango1.0 (Ubuntu Focal) Milestone: None => ubuntu-20.04 -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to pango1.0 in Ubuntu. https://bugs.launchpad.net/bugs/1871960 Title: package libpam-modules 1.1.8-3.6ubuntu2.18.04.1 failed to install/upgrade: pre-dependency problem - not installing libpam- modules:amd64 Status in libgtk3-perl package in Ubuntu: Confirmed Status in pango1.0 package in Ubuntu: Confirmed Status in libgtk3-perl source package in Focal: Confirmed Status in pango1.0 source package in Focal: Confirmed Bug description: I was updating ubuntu to the 20.04 version. Not all packages were updated. I receive new errors every few seconds. what should I do? Thanks safi ProblemType: Package DistroRelease: Ubuntu 20.04 Package: libpam-modules 1.1.8-3.6ubuntu2.18.04.1 ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27 Uname: Linux 5.4.0-21-generic x86_64 ApportVersion: 2.20.11-0ubuntu25 Architecture: amd64 Date: Fri Apr 10 00:36:08 2020 ErrorMessage: pre-dependency problem - not installing libpam-modules:amd64 InstallationDate: Installed on 2019-12-28 (102 days ago) InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) Python3Details: /usr/bin/python3.8, Python 3.8.2, python3-minimal, 3.8.2-0ubuntu2 PythonDetails: N/A RelatedPackageVersions: dpkg 1.19.7ubuntu3 apt 2.0.1ubuntu1 SourcePackage: pam Title: package libpam-modules 1.1.8-3.6ubuntu2.18.04.1 failed to install/upgrade: pre-dependency problem - not installing libpam-modules:amd64 UpgradeStatus: Upgraded to focal on 2020-04-09 (0 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libgtk3-perl/+bug/1871960/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp