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[Launchpad Bug Tracker <1556684@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package gnome-control-center -
1:3.18.2-1ubuntu6

---------------
gnome-control-center (1:3.18.2-1ubuntu6) xenial; urgency=medium

  * debian/patches:
    - ubuntu-region-packagekit.patch:
       fix detection of installed language packs (LP: #1556684)
       fix typo, thanks Nikita (LP: #1556693)
       fix crash on 32-bit systems
    - 52_region_language.patch:
       improve debug message
       fix locale warning
    - ubuntu-region-langpack-install.patch:
       check for missing language packs when loading region panel, this will
       pull in packs that arent included with the installer (LP: #1525281)

 -- Tim Lunn <tim@xxxxxxxxxxxxxx>  Sun, 20 Mar 2016 15:26:18 +1100

** Changed in: gnome-control-center (Ubuntu)
       Status: Triaged => Fix Released

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https://bugs.launchpad.net/bugs/1556684

Title:
  gnome-control-center.real crashed with SIGSEGV in g_utf8_validate()

Status in Ubuntu GNOME:
  Fix Released
Status in accountsservice package in Ubuntu:
  Fix Released
Status in gnome-control-center package in Ubuntu:
  Fix Released

Bug description:
  I wanted to install Japanese through the gnome-control-center, so I
  opened it, went to the "Region & Language" section, clicked
  "Language", searched for "Japanese", when I found it I clicked on it
  (a tick appeared next to it), and finally I clicked "Done". Now what
  then should have happened is it should have asked me if I wanted to
  install the language packs it would then present to me and I would be
  able to continue with the installation... What instead happened was it
  hanged for a while and then finally outputted in Terminal:

      (gnome-control-center.real:1726): common-cc-panel-WARNING **: Language ja_JP.UTF-8 not installed, trying to intall it
      Segmentation fault (core dumped)

  The full output in Terminal was:

      ** (gnome-control-center.real:1726): WARNING **: Ignoring launcher landscape-client-settings (missing desktop file)
      
      ** (gnome-control-center.real:1726): WARNING **: Ignoring launcher language-selector (missing desktop file)
      
      ** (gnome-control-center.real:1726): WARNING **: Ignoring launcher ubuntuone-installer (missing desktop file)
      
      (gnome-control-center.real:1726): common-cc-panel-WARNING **: Couldn't get LANG locale -- Copying interrupted
      
      (gnome-control-center.real:1726): GnomeDesktop-CRITICAL **: gnome_get_language_from_locale: assertion '*locale != '\0'' failed
      
      (gnome-control-center.real:1726): GnomeDesktop-CRITICAL **: gnome_get_country_from_locale: assertion '*locale != '\0'' failed

      (gnome-control-center.real:1726): common-cc-panel-WARNING **: Couldn't get LANG locale -- Copying interrupted
      
      (gnome-control-center.real:1726): GnomeDesktop-CRITICAL **: gnome_get_language_from_locale: assertion '*locale != '\0'' failed
      
      (gnome-control-center.real:1726): common-cc-panel-WARNING **: Language ja_JP.UTF-8 not installed, trying to intall it
      Segmentation fault (core dumped)

  I have tested this bug and it is present in Ubuntu GNOME 15.10 with
  GNOME 3.18 and 16.04 with GNOME 3.19 VMs, however I cannot reproduce
  it on the host (15.10 with GNOME 3.18).

  ProblemType: Crash
  DistroRelease: Ubuntu 16.04
  Package: gnome-control-center 1:3.19.90-0ubuntu1~xenial1 [origin: LP-PPA-gnome3-team-gnome3-staging]
  ProcVersionSignature: Ubuntu 4.4.0-12.28-generic 4.4.4
  Uname: Linux 4.4.0-12-generic i686
  ApportVersion: 2.20-0ubuntu3
  Architecture: i386
  CrashCounter: 1
  CurrentDesktop: GNOME
  Date: Sun Mar 13 20:45:54 2016
  ExecutablePath: /usr/bin/gnome-control-center.real
  InstallationDate: Installed on 2016-03-04 (9 days ago)
  InstallationMedia: Ubuntu-GNOME 16.04 LTS "Xenial Xerus" - Alpha i386 (20160225.1)
  ProcCmdline: /usr/bin/gnome-control-center.real
  SegvAnalysis:
   Segfault happened at: 0xb5b30c10 <g_utf8_validate+256>:	movzbl (%ebx),%eax
   PC (0xb5b30c10) ok
   source "(%ebx)" (0x13e9c381) not located in a known VMA region (needed readable region)!
   destination "%eax" ok
  SegvReason: reading unknown VMA
  Signal: 11
  SourcePackage: gnome-control-center
  StacktraceTop:
   g_utf8_validate () from /lib/i386-linux-gnu/libglib-2.0.so.0
   g_variant_new_string () from /lib/i386-linux-gnu/libglib-2.0.so.0
   g_variant_new_strv () from /lib/i386-linux-gnu/libglib-2.0.so.0
   ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
   ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
  Title: gnome-control-center.real crashed with SIGSEGV in g_utf8_validate()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

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