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[Apport retracing service <1435279@xxxxxxxxxxxxxxxxxx>]

*** This bug is a duplicate of bug 1303984 ***
    https://bugs.launchpad.net/bugs/1303984

Thank you for taking the time to report this crash and helping to make
this software better.  This particular crash has already been reported
and is a duplicate of bug #1303984, so is being marked as such.  Please
look at the other bug report to see if there is any missing information
that you can provide, or to see if there is a workaround for the bug.
Additionally, any further discussion regarding the bug should occur in
the other report.  Please continue to report any other bugs you may
find.

** Attachment removed: "CoreDump.gz"
   https://bugs.launchpad.net/bugs/1435279/+attachment/4353211/+files/CoreDump.gz

** Attachment removed: "Disassembly.txt"
   https://bugs.launchpad.net/bugs/1435279/+attachment/4353213/+files/Disassembly.txt

** Attachment removed: "ProcMaps.txt"
   https://bugs.launchpad.net/bugs/1435279/+attachment/4353214/+files/ProcMaps.txt

** Attachment removed: "ProcStatus.txt"
   https://bugs.launchpad.net/bugs/1435279/+attachment/4353215/+files/ProcStatus.txt

** Attachment removed: "Registers.txt"
   https://bugs.launchpad.net/bugs/1435279/+attachment/4353216/+files/Registers.txt

** Attachment removed: "Stacktrace.txt"
   https://bugs.launchpad.net/bugs/1435279/+attachment/4353217/+files/Stacktrace.txt

** Attachment removed: "ThreadStacktrace.txt"
   https://bugs.launchpad.net/bugs/1435279/+attachment/4353218/+files/ThreadStacktrace.txt

** This bug has been marked a duplicate of private bug 1303984

** Information type changed from Private to Public

** Tags removed: need-amd64-retrace

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to gnome-session in Ubuntu.
https://bugs.launchpad.net/bugs/1435279

Title:
  gnome-session-check-accelerated-helper crashed with SIGSEGV in
  xcb_glx_query_server_string_string_length()

Status in gnome-session package in Ubuntu:
  New

Bug description:
  $ uname -a
  Linux desktop 3.19.0-9-generic #9-Ubuntu SMP Wed Mar 11 17:50:03 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
  user@desktop:~$ lsb_release -a
  No LSB modules are available.
  Distributor ID:	Ubuntu
  Description:	Ubuntu Vivid Vervet (development branch)
  Release:	15.04
  Codename:	vivid

  ProblemType: Crash
  DistroRelease: Ubuntu 15.04
  Package: gnome-session-bin 3.14.0-2ubuntu4
  ProcVersionSignature: Ubuntu 3.19.0-9.9-generic 3.19.1
  Uname: Linux 3.19.0-9-generic x86_64
  ApportVersion: 2.16.2-0ubuntu4
  Architecture: amd64
  CurrentDesktop: GNOME
  Date: Mon Mar 23 11:59:43 2015
  ExecutablePath: /usr/lib/gnome-session/gnome-session-check-accelerated-helper
  InstallationDate: Installed on 2015-03-14 (9 days ago)
  InstallationMedia: Ubuntu-GNOME 15.04 "Vivid Vervet" - Alpha amd64 (20150312)
  ProcCmdline: /usr/lib/gnome-session/gnome-session-check-accelerated-helper
  ProcEnviron:
   SHELL=/bin/false
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=de_DE.UTF-8
  SegvAnalysis:
   Segfault happened at: 0x7f8c41fce0a0 <xcb_glx_query_server_string_string_length>:	mov    0xc(%rdi),%eax
   PC (0x7f8c41fce0a0) ok
   source "0xc(%rdi)" (0x0000000c) not located in a known VMA region (needed readable region)!
   destination "%eax" ok
  SegvReason: reading NULL VMA
  Signal: 11
  SourcePackage: gnome-session
  StacktraceTop:
   xcb_glx_query_server_string_string_length () from /usr/lib/x86_64-linux-gnu/libxcb-glx.so.0
   ?? () from /usr/lib/x86_64-linux-gnu/mesa/libGL.so.1
   ?? () from /usr/lib/x86_64-linux-gnu/mesa/libGL.so.1
   ?? () from /usr/lib/x86_64-linux-gnu/mesa/libGL.so.1
   glXChooseVisual () from /usr/lib/x86_64-linux-gnu/mesa/libGL.so.1
  Title: gnome-session-check-accelerated-helper crashed with SIGSEGV in xcb_glx_query_server_string_string_length()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

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