org.gnome.desktop.default-applications.gschema.xml references undefined child schema org.gnome.desktop.default-applications.at

[Eliah Kagan]

Binary package hint: gsettings-desktop-schemas

On two similar Oneiric i386 systems with gsettings-desktop-schemas 3.0.1-1ubuntu2, the following text appeared in the Terminal while upgrading libglib2.0-0 from 2.29.6-0ubuntu3 to 2.29.6-0ubuntu4 via "sudo apt-get upgrade":

Setting up libglib2.0-0 (2.29.6-0ubuntu4) ...
warning: undefined reference to <schema id='org.gnome.desktop.default-applications.at'/>

I found that the same warning message was reported as a bug in Fedora rawhide (https://bugzilla.redhat.com/show_bug.cgi?id=706078). The analysis in that bug suggested that this is due to the file /usr/share/glib2/schemas/org.gnome.desktop.default-applications.gschema.xml referring to but not defining org.gnome.desktop.default-applications.at. In Ubuntu, the corresponding file is in /usr/share/glib-2.0/schemas (same filename), and this is the case. The file specifies org.gnome.desktop.default-applications.at as a child schema of org.gnome.desktop.default-applications, but unlike the other specified child schemas, the file does not contain an entry for org.gnome.desktop.default-applications.at.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: gsettings-desktop-schemas 3.0.1-1ubuntu2
ProcVersionSignature: Ubuntu 2.6.39-3.10-generic 2.6.39
Uname: Linux 2.6.39-3-generic i686
Architecture: i386
Date: Mon Jun 13 07:38:29 2011
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha i386 (20110604)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, no user)
 LANG=en_US.utf8
 LC_MESSAGES=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: gsettings-desktop-schemas
UpgradeStatus: No upgrade log present (probably fresh install)

[Stijn (stijn-redhat-bugs)]

Description of problem:

Install a package that invokes glib-compile-schemas, then witness this:

  Updating : webkitgtk3-1.4.0-2.fc16.x86_64 41/181
warning: undefined reference to <schema id='org.gnome.desktop.default-applications.at'/>

Version-Release number of selected component (if applicable):

gsettings-desktop-schemas-3.0.1-1.fc16.noarch

This seems to be because /usr/share/glib2/schemas/org.gnome.desktop.default-applications.gschema.xml contains a reference to child schema 'org.gnome.desktop.default-applications.at' while no such schema ID is then defined in the rest of the file.

Note that I have on clue whatsoever about gsettings schemas, so I might be 100% wrong here.

[Eliah (eliah-redhat-bugs)]

I have produced and reported this bug in Ubuntu oneiric (see https://bugs.launchpad.net/ubuntu/+source/gsettings-desktop-schemas/+bug/796578).

[Michal (michal-redhat-bugs)]

I can confirm the same issue is existing now in Fedora 15.

This command will fail and end with coredump:
gsettings list-recursively org.gnome.desktop.default-applications

[Michal (michal-redhat-bugs)]

I forgot the output of the command

$ gsettings list-recursively org.gnome.desktop.default-applications

GLib-GIO-ERROR **: Settings schema 'org.gnome.desktop.default-applications.at' is not installed

aborting...
Aborted (core dumped)

Best regards
Michal Ambroz

[Michal (michal-redhat-bugs)]

It seems that the "at" child was already removed in the upstream:
http://mail.gnome.org/archives/commits-list/2011-May/msg03106.html

After removing the child line and compiling the schemas the error goes away.

#glib-compile-schemas /usr/share/glib-2.0/schemas
# gsettings list-recursively org.gnome.desktop.default-applications
org.gnome.desktop.default-applications.terminal exec 'gnome-terminal'
org.gnome.desktop.default-applications.terminal exec-arg '-x'

I have also checked other schemas and none of the others suffers the same issue:
#!/bin/bash
SCHEMAS=`gsettings list-schemas`
for I in $SCHEMAS ; do
 echo "=== $I ==="
 gsettings list-recursively $I

done

Best regards
Michal Ambroz

[Launchpad Janitor (janitor)]

This bug was fixed in the package gsettings-desktop-schemas - 3.0.1-1ubuntu3

---------------
gsettings-desktop-schemas (3.0.1-1ubuntu3) oneiric; urgency=low

  * debian/patches/02_git_remove_default_apps_at.patch:
    - Add upstream patch to remove non existing child schema (LP: #796578)
 -- Rodrigo Moya <email address hidden> Thu, 23 Jun 2011 10:29:24 +0200

[Michal (michal-redhat-bugs)]

Seems to be fixed in current gsettings-desktop-schemas-3.2.0-1.fc16.noarch

Best regards
Michal Ambroz