[Bug 1627564] Re: Debconf crash due to assertion failure in ensure_surface_for_gicon [gtkiconhelper.c:493] (when png loader is missing/during upgrades)

[Iain Lane]

> OTOH I think there is an easy fix for GTK+ to always include an
"image-missing" icon at compile time

I'm sorry, it's not that easy. A PNG icon is indeed included, and it
gets found properly (also from the actual icon theme; that is a
dependency of GTK). The problem is the ability to load PNGs *at all* is
not available sometimes during the middle of dist-upgrades.

I think extending that test program in Debconf (referred to in the IRC
log above) to do a bit more work - trying to load an icon - might make
the fallback trigger in this case too.

e.g:

  my $window = Gtk3::Window->new('toplevel');
  my $icontheme = Gtk3::IconTheme::get_default;
  my $icon = $icontheme->load_icon('image-missing', 32, []);

If you manually remove '/usr/lib/*/gdk-pixbuf-2.0/2.10.0/loaders.cache'
(suggest doing this in a VM) then you can reproduce this by extracting
the program out of Debconf.

** Changed in: gtk+3.0 (Ubuntu)
       Status: New => Invalid

** Changed in: gtk+3.0 (Ubuntu Focal)
       Status: New => Invalid

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to debconf in Ubuntu.
https://bugs.launchpad.net/bugs/1627564

Title:
  Debconf crash due to assertion failure in ensure_surface_for_gicon
  [gtkiconhelper.c:493] (when png loader is missing/during upgrades)

Status in debconf package in Ubuntu:
  Confirmed
Status in gtk+3.0 package in Ubuntu:
  Invalid
Status in debconf source package in Focal:
  Confirmed
Status in gtk+3.0 source package in Focal:
  Invalid

Bug description:
  https://errors.ubuntu.com/problem/2b11576fed59ad23c640bc85a266cc82ec30a689
  https://errors.ubuntu.com/problem/9d612b3f25168e76adb91fa4eedc301ffa632383

  ---

  bubble opened up indicating there was a failure during the latest
  update.

  ProblemType: Crash
  DistroRelease: Ubuntu 16.10
  Package: lightdm-gtk-greeter 2.0.1-2ubuntu4
  ProcVersionSignature: Ubuntu 4.8.0-16.17-generic 4.8.0-rc7
  Uname: Linux 4.4.0-9136-generic i686
  ApportVersion: 2.20.3-0ubuntu7
  Architecture: i386
  Date: Sun Sep 25 20:37:06 2016
  ExecutablePath: /usr/sbin/lightdm-gtk-greeter
  InstallationDate: Installed on 2016-08-04 (52 days ago)
  InstallationMedia: Lubuntu 16.10 "Yakkety Yak" - Alpha i386 (20160727)
  ProcCmdline: /usr/sbin/lightdm-gtk-greeter
  ProcEnviron:
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/false
  Signal: 6
  SourcePackage: lightdm-gtk-greeter
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

  modified.conffile..etc.lightdm.lightdm-gtk-greeter.conf:
   [greeter]
   theme-name = Lubuntu-dark-panel
  mtime.conffile..etc.lightdm.lightdm-gtk-greeter.conf: 2016-08-14T22:33:57.293011

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/debconf/+bug/1627564/+subscriptions