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[Steve Langasek <steve.langasek@xxxxxxxxxxxxx>]

So I haven't been able to reproduce this issue with the media keys
normally.  What it actually correlates with is my bluetooth headset
pairing with my laptop; I thought it might have been the media keys
because whenever I pair the headset it spontaneously emits a media key
event (which is probably a bug in the bluetooth stack somewhere), but
when pressing any of the media keys, either on my laptop keyboard or on
my headset, evince doesn't crash.

But I had a hunch that it might be related to the registration of a new
input device.  Disconnected my USB keyboard and reconnected it, and
evince crashed again.  So that's the key here.

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https://bugs.launchpad.net/bugs/891440

Title:
  evince crashed with SIGSEGV in xcb_get_extension_data()

Status in uTouch-geis:
  New
Status in “evince” package in Ubuntu:
  Confirmed

Bug description:
  dunno why it crashed.

  ProblemType: Crash
  DistroRelease: Ubuntu 12.04
  Package: evince 3.2.1-0ubuntu2
  ProcVersionSignature: Ubuntu 3.1.0-3.3-generic 3.1.0
  Uname: Linux 3.1.0-3-generic x86_64
  ApportVersion: 1.26-0ubuntu1
  Architecture: amd64
  CrashCounter: 1
  Date: Wed Nov 16 16:42:49 2011
  ExecutablePath: /usr/bin/evince
  InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1)
  ProcCmdline: BOOT_IMAGE=/vmlinuz-3.1.0-3-generic root=/dev/mapper/hostname-root ro crashkernel=384M-2G:64M,2G-:128M quiet splash vt.handoff=7
  ProcEnviron:
   PATH=(custom, user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SegvAnalysis:
   Segfault happened at: 0x7fe18c9a65ab <xcb_get_extension_data+27>:	mov    (%rdi),%ecx
   PC (0x7fe18c9a65ab) ok
   source "(%rdi)" (0x00000021) not located in a known VMA region (needed readable region)!
   destination "%ecx" ok
  SegvReason: reading NULL VMA
  Signal: 11
  SourcePackage: evince
  StacktraceTop:
   xcb_get_extension_data () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
   ?? () from /usr/lib/libutouch-geis.so.1
   ?? () from /usr/lib/libutouch-geis.so.1
   geis_event_dispatch () from /usr/lib/libutouch-geis.so.1
   ?? () from /usr/lib/libgrip.so.0
  Title: evince crashed with SIGSEGV in xcb_get_extension_data()
  UpgradeStatus: Upgraded to precise on 2011-11-08 (8 days ago)
  UserGroups: adm admin cdrom dialout libvirtd lpadmin mythtv plugdev sambashare src

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