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[Luke Morrison <1393061@xxxxxxxxxxxxxxxxxx>]

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https://bugs.launchpad.net/bugs/1393061

Title:
  mythfrontend.real crashed with SIGSEGV in
  DecoderBase::DoFastForwardSeek()

Status in Mythbuntu, Ubuntu derivative focused upon MythTV:
  New

Bug description:
  I was watching liveTV and then paused it.  After continuing to watch,
  I tried to Fast Forward and at that point it stopped responding and
  crashed the front end.

  ProblemType: Crash
  DistroRelease: Ubuntu 12.04
  Package: mythtv-frontend 2:0.28.0~master.20141115.13de778-0ubuntu0mythbuntu1 [origin: LP-PPA-mythbuntu-0.28]
  ProcVersionSignature: Ubuntu 3.13.0-39.66~precise1-generic 3.13.11.8
  Uname: Linux 3.13.0-39-generic x86_64
  NonfreeKernelModules: nvidia
  .var.log.mythtv.mythavtest.log:
   
  .var.log.mythtv.mythccextractor.log:
   
  .var.log.mythtv.mythjobqueue.log:
   
  .var.log.mythtv.mythlcdserver.log:
   
  .var.log.mythtv.mythmediaserver.log:
   
  .var.log.mythtv.mythshutdown.log:
   
  .var.log.mythtv.mythutil.log:
   
  .var.log.mythtv.mythwelcome.log:
   
  ApportVersion: 2.0.1-0ubuntu17.8
  Architecture: amd64
  CrashCounter: 1
  CrashDB: mythbuntu
  Date: Sat Nov 15 14:25:14 2014
  ExecutablePath: /usr/bin/mythfrontend.real
  InstallationMedia: Mythbuntu 12.04 "Precise Pangolin" - Release amd64 (20120425)
  Installed_mythtv_dbg: 2:0.28.0~master.20141115.13de778-0ubuntu0mythbuntu1
  MarkForUpload: True
  ProcCmdline: /usr/bin/mythfrontend.real --syslog local7
  ProcEnviron:
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SegvAnalysis:
   Segfault happened at: 0x7ffa5b65036f <DecoderBase::DoFastForwardSeek(long long, bool&)+413>:	mov    (%rax),%rdx
   PC (0x7ffa5b65036f) ok
   source "(%rax)" (0x00000000) not located in a known VMA region (needed readable region)!
   destination "%rdx" ok
   Stack memory exhausted (SP below stack segment)
  SegvReason: reading NULL VMA
  Signal: 11
  SourcePackage: mythtv
  StacktraceTop:
   DecoderBase::DoFastForwardSeek (this=0x576f250, desiredFrame=0, needflush=@0x7ff9f27fbadc: true) at decoderbase.cpp:866
   AvFormatDecoder::DoFastForwardSeek (this=0x576f250, desiredFrame=0, needflush=@0x7ff9f27fbadc: true) at avformatdecoder.cpp:2586
   DecoderBase::DoFastForward (this=0x576f250, desiredFrame=0, discardFrames=true) at decoderbase.cpp:787
   AvFormatDecoder::DoFastForward (this=0x576f250, desiredFrame=90406, discardFrames=true) at avformatdecoder.cpp:648
   MythPlayer::DecoderLoop (this=0x549f660, pause=true) at mythplayer.cpp:3335
  Title: mythfrontend.real crashed with SIGSEGV in DecoderBase::DoFastForwardSeek()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin mythtv plugdev sambashare sudo video
  XsessionErrors:
   (xfce4-settings-helper:2512): xfce4-settings-helper-WARNING **: Failed to get the _NET_NUMBER_OF_DESKTOPS property.
   (polkit-gnome-authentication-agent-1:2503): GLib-CRITICAL **: g_variant_new_string: assertion `string != NULL' failed
   (polkit-gnome-authentication-agent-1:2503): polkit-gnome-1-WARNING **: Failed to register client: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.SessionManager was not provided by any .service files

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