[Bug 1142947] Re: webkit--epiphany-browser crashed with SIGSEGV in Decoder()

[Brian Murray]

I'd prefer not to upload this patch at this point in time as it does
seem to be an interim fix and not ideal.  I went searching for crashes
like this at errors.ubuntu.com about either epiphany-browser or lernid
and did not find any, so I don't believe a large number of people are
affected by this.

However, I've opened a task for Raring and will set a milestone so that we revisit the issue before 13.04 is released.  Thanks for you work here.  Oh, and for future reference it is helpful to put some metadata about the patch in it.  For more information see:
http://dep.debian.net/deps/dep3/

** Changed in: webkit (Ubuntu Raring)
    Milestone: None => ubuntu-13.04

-- 
You received this bug notification because you are a member of Ubuntu
Sponsors Team, which is subscribed to the bug report.
https://bugs.launchpad.net/bugs/1142947

Title:
  webkit--epiphany-browser crashed with SIGSEGV in Decoder()

Status in Lernid:
  Invalid
Status in Webkit Direct Port:
  New
Status in “epiphany-browser” package in Ubuntu:
  Invalid
Status in “lernid” package in Ubuntu:
  Invalid
Status in “webkit” package in Ubuntu:
  Triaged
Status in “epiphany-browser” source package in Raring:
  Invalid
Status in “lernid” source package in Raring:
  Invalid
Status in “webkit” source package in Raring:
  Triaged

Bug description:
  Crash on browsing watching youtube video from http://ubuntuonair.com. Expected it to play the whole hangout video but played less than a minute. After restarting the browser it crashed again with another random video off youtube in less than 10 seconds. It appears to matter which video, or has another intermittent effect.The last failing
  video I've found is http://www.youtube.com/watch?v=Ir2TdfSwH8g.

  Also fails on lernid, which I'm testing, and midori--both also webkit
  browsers.

  Running today's live i386 CD from raring. (Today == 2013-3-3).

  No flash installed and therefore I assume that it is using html 5.
  Running flash in lernid and midori avoids the problem as webkit seems
  to use it in preference to html5--but that's just my guess.

  To reproduce:

  Install raring
  **Don't install flash**
  Install ephiphany with 'sudo apt-get install epiphany-browser'
  Start epiphany from the terminal with "epiphany "http://www.youtube.com/watch?v=Ir2TdfSwH8g
  Start the video and wait for the video to stop (coincident with the halt in the video within a minute).

  ProblemType: Crash
  DistroRelease: Ubuntu 13.04
  Package: epiphany-browser 3.6.1-2ubuntu1
  ProcVersionSignature: Ubuntu 3.8.0-9.18-generic 3.8.1
  Uname: Linux 3.8.0-9-generic i686
  ApportVersion: 2.9-0ubuntu2
  Architecture: i386
  CasperVersion: 1.330
  Date: Sun Mar  3 16:55:35 2013
  ExecutablePath: /usr/bin/epiphany-browser
  LiveMediaBuild: Ubuntu 13.04 "Raring Ringtail" - Alpha i386 (20130303)
  MarkForUpload: True
  ProcCmdline: epiphany-browser
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SegvAnalysis:
   Segfault happened at: 0xb49fe2b9 <_ZN3JSC3DFG15AssemblyHelpers17decodedCodeMapForEPNS_9CodeBlockE+473>:	mov    0x4(%edx),%edi
   PC (0xb49fe2b9) ok
   source "0x4(%edx)" (0x00000004) not located in a known VMA region (needed readable region)!
   destination "%edi" ok
  SegvReason: reading NULL VMA
  Signal: 11
  SourcePackage: epiphany-browser
  StacktraceTop:
   JSC::DFG::AssemblyHelpers::decodedCodeMapFor(JSC::CodeBlock*) () from /usr/lib/libjavascriptcoregtk-3.0.so.0
   JSC::DFG::OSRExitCompiler::compileExit(JSC::DFG::OSRExit const&, JSC::Operands<JSC::ValueRecovery, JSC::OperandValueTraits<JSC::ValueRecovery> > const&, JSC::DFG::SpeculationRecovery*) () from /usr/lib/libjavascriptcoregtk-3.0.so.0
   ?? () from /usr/lib/libjavascriptcoregtk-3.0.so.0
   ?? ()
   JSC::Interpreter::executeCall(JSC::ExecState*, JSC::JSObject*, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) () from /usr/lib/libjavascriptcoregtk-3.0.so.0
  Title: epiphany-browser crashed with SIGSEGV in JSC::DFG::AssemblyHelpers::decodedCodeMapFor()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  XsessionErrors:
   (process:3675): GLib-GIO-WARNING **: g_settings_set_value: value for key 'visual-bell-type' in schema 'org.gnome.desktop.wm.preferences' is outside of valid range
   (process:3675): GLib-GIO-WARNING **: g_settings_set_value: value for key 'visual-bell-type' in schema 'org.gnome.desktop.wm.preferences' is outside of valid range
   (process:3675): GLib-GIO-WARNING **: g_settings_set_value: value for key 'visual-bell-type' in schema 'org.gnome.desktop.wm.preferences' is outside of valid range
   (gnome-settings-daemon:3483): libappindicator-CRITICAL **: app_indicator_set_label: assertion `IS_APP_INDICATOR (self)' failed
   (process:8224): GLib-CRITICAL **: g_slice_set_config: assertion `sys_page_size == 0' failed

To manage notifications about this bug go to:
https://bugs.launchpad.net/lernid/+bug/1142947/+subscriptions