[Bug 1142947] [NEW] epiphany-browser crashed with SIGSEGV in Decoder()

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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

** Affects: lernid
     Importance: Critical
         Status: Invalid

** Affects: webkit
     Importance: Unknown
         Status: Unknown

** Affects: epiphany-browser (Ubuntu)
     Importance: Medium
         Status: Invalid

** Affects: lernid (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: webkit (Ubuntu)
     Importance: Undecided
     Assignee: John S. Gruber (jsjgruber)
         Status: New


** Tags: apport-crash i386 patch raring
-- 
epiphany-browser crashed with SIGSEGV in Decoder()
https://bugs.launchpad.net/bugs/1142947
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