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[Apport retracing service <1496196@xxxxxxxxxxxxxxxxxx>]

StacktraceTop:
 get_default_language_name (self=<optimized out>) at gdm-session.c:488
 worker_on_saved_language_name_read (worker=0xd550b0, language_name=0xe534e0 "en_US", conversation=0xe194e0) at gdm-session.c:878
 ffi_call_unix64 () at ../src/x86/unix64.S:76
 ffi_call (cif=<optimized out>, fn=<optimized out>, rvalue=0x7fffc2a0d490, avalue=0x7fffc2a0d430) at ../src/x86/ffi64.c:525
 ?? ()

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https://bugs.launchpad.net/bugs/1496196

Title:
  gdm crashed with SIGSEGV in get_default_language_name()

Status in gdm package in Ubuntu:
  New

Bug description:
  it crashes alongside aptd

  ProblemType: Crash
  DistroRelease: Ubuntu 15.10
  Package: gdm 3.16.2-0ubuntu2
  ProcVersionSignature: Ubuntu 4.2.0-10.11-generic 4.2.0
  Uname: Linux 4.2.0-7-generic x86_64
  ApportVersion: 2.18.1-0ubuntu1
  Architecture: amd64
  Date: Wed Sep  9 12:44:01 2015
  ExecutablePath: /usr/sbin/gdm
  InstallationDate: Installed on 2015-06-16 (91 days ago)
  InstallationMedia: Ubuntu-GNOME 15.10 "Wily Werewolf" - Alpha amd64 (20150614)
  ProcCmdline: /usr/sbin/gdm
  ProcEnviron:
   LANG=en_US.UTF-8
   PATH=(custom, no user)
  SegvAnalysis:
   Segfault happened at: 0x41ab8f:	mov    0x18(%rbp),%rax
   PC (0x0041ab8f) ok
   source "0x18(%rbp)" (0x00000018) not located in a known VMA region (needed readable region)!
   destination "%rax" ok
  SegvReason: reading NULL VMA
  Signal: 11
  SourcePackage: gdm
  StacktraceTop:
   ?? ()
   ffi_call_unix64 () from /usr/lib/x86_64-linux-gnu/libffi.so.6
   ffi_call () from /usr/lib/x86_64-linux-gnu/libffi.so.6
   g_cclosure_marshal_generic () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
   g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
  Title: gdm crashed with SIGSEGV in ffi_call_unix64()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

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