On cosmic the SRU fixes the thumbnail creation, but starting from a
command line nautilus shows those G_IS_OBJECT (object) warnings
#0 g_log (log_domain=0xb70fd07b "GLib-GObject",
log_level=G_LOG_LEVEL_CRITICAL,
format=0xb7f186b2 "%s: assertion '%s' failed")
at ../../../../glib/gmessages.c:1412
#1 0xb7ec9249 in g_return_if_fail_warning (
log_domain=0xb70fd07b "GLib-GObject",
pretty_function=0xb7100334 <__func__.14497> "g_object_ref",
expression=0xb70ff236 "G_IS_OBJECT (object)")
at ../../../../glib/gmessages.c:2762
#2 0xb70d1990 in g_object_ref (_object=0x0)
at ../../../../gobject/gobject.c:3212
#3 0xb6ff93f4 in get_preview_thumbnail (size=<optimized out>,
uri=<optimized out>) at gnome-desktop-thumbnail.c:972
#4 gnome_desktop_thumbnail_factory_generate_thumbnail (factory=0xb70158,
uri=0x9565a0
"file:///usr/share/backgrounds/Ross_Jones_Rockpool_(Sydney)_by_Chris_Carignan.jpg",
mime_type=0x8d88a0 "image/jpeg")
at gnome-desktop-thumbnail.c:1058
#5 0x0048dc13 in ?? ()
#6 0xb71aa7bf in g_task_thread_pool_thread (thread_data=0xabf290,
pool_data=0x0) at ../../../../gio/gtask.c:1331
#7 0xb7eeb30d in g_thread_pool_thread_proxy (data=0x620ba0)
at ../../../../glib/gthreadpool.c:307
#8 0xb7eea8ba in g_thread_proxy (data=0x78c780)
at ../../../../glib/gthread.c:784
#9 0xb6a22fed in start_thread (arg=0xadeecb40) at pthread_create.c:486
#10 0xb6936a76 in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:108
Unsure if that should block the SRU though? (there is no warning when
using the bionic libgnome-desktop-3-17 version (pre-bubblewrap changes)
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https://bugs.launchpad.net/bugs/1807127
Title:
Fixing bug #1795668 breaks thumbnail creation on 32-bit Ubuntu
Status in gnome-desktop3 package in Ubuntu:
Fix Released
Status in gnome-desktop3 source package in Bionic:
Fix Released
Status in gnome-desktop3 source package in Cosmic:
Fix Committed
Bug description:
Impact
======
Thumbnailing doesn't work on Ubuntu 18.04 LTS or 18.10 on 32-bit installs.
Test Case
=========
Install Ubuntu 18.10 32-bit
Install the update. Log out and log back in.
Download a picture from the internet.
Open your file browser to the directory that contains the picture. The file
should show a thumbnail preview.
Regression Potential
====================
This fix was cherry-picked to the stable gnome-3-30 branch.
It was additionally tested by Iain Lane on usrmerged and non-usrmerged
systems. (We don't support usrmerge for Ubuntu 18.04 LTS or 18.10.)
Other Info
==========
Triaged as Critical for 18.04 LTS since this was a regression introduced in
the security update that backported the bubblewrap hardening to the
gnome-desktop3 thumbnailer.
Original Bug Report
===================
Fixing bug #1795668 breaks thumbnail creation on 32-bit Ubuntu.
Looks like same issue in upstream -
https://bugzilla.redhat.com/show_bug.cgi?id=1651952
Cause - bubblewrap runs with --ro-bind /lib64 option, then fails.
Workaround - create empty /lib64 directory at root.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: libgnome-desktop-3-17 3.28.2-0ubuntu1.1
ProcVersionSignature: Ubuntu 4.15.0-42.45-generic 4.15.18
Uname: Linux 4.15.0-42-generic i686
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: i386
CurrentDesktop: ubuntu:GNOME
Date: Thu Dec 6 12:07:28 2018
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: gnome-desktop3
UpgradeStatus: No upgrade log present (probably fresh install)
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