midori crashed with SIGSEGV in WTF::String::isolatedCopy()

[dino99]

Firstly reported Bug #1610055; but webkit2gtk has been upgraded to 2.12.3-1build2.
The crash now happens a bit later: hitting the midori icon to launch it, a greyed background page is opened and crashed.

ProblemType: Crash
DistroRelease: Ubuntu 16.10
Package: midori 0.5.11-ds1-3
ProcVersionSignature: Ubuntu 4.7.0-0.3-generic 4.7.0
Uname: Linux 4.7.0-0-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.3-0ubuntu5
Architecture: amd64
CurrentDesktop: GNOME
Date: Fri Aug 5 15:15:27 2016
ExecutablePath: /usr/bin/midori
ExecutableTimestamp: 1468949692
ProcCmdline: midori
ProcCwd: /home/oem
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7fbf19057618 <_ZNK3WTF6String12isolatedCopyEv+8>: mov (%rsi),%rdx
 PC (0x7fbf19057618) ok
 source "(%rsi)" (0x00000008) not located in a known VMA region (needed readable region)!
 destination "%rdx" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: midori
StacktraceTop:
 WTF::String::isolatedCopy() const () from /usr/lib/x86_64-linux-gnu/libjavascriptcoregtk-1.0.so.0
 OpaqueJSString::string() const () from /usr/lib/x86_64-linux-gnu/libjavascriptcoregtk-1.0.so.0
 JSEvaluateScript () from /usr/lib/x86_64-linux-gnu/libjavascriptcoregtk-1.0.so.0
 sokoke_js_script_eval () from /usr/lib/libmidori-core.so.1
 ?? () from /usr/lib/libmidori-core.so.1
Title: midori crashed with SIGSEGV in WTF::String::isolatedCopy()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 WTF::String::isolatedCopy() const () from /tmp/apport_sandbox_5AD30j/usr/lib/x86_64-linux-gnu/libjavascriptcoregtk-1.0.so.0
 OpaqueJSString::string() const () from /tmp/apport_sandbox_5AD30j/usr/lib/x86_64-linux-gnu/libjavascriptcoregtk-1.0.so.0
 JSEvaluateScript () from /tmp/apport_sandbox_5AD30j/usr/lib/x86_64-linux-gnu/libjavascriptcoregtk-1.0.so.0
 sokoke_js_script_eval (js_context=js_context@entry=0x7fbe9d76f9b0, script=script@entry=0x5593f30a3a00 "(function (tags) {for (var tag in tags) {var l = document.getElementsByTagName (tag);for (var i in l) { if ((l[i].rel && l[i].rel.toLowerCase () == 'prev') || (l[i].innerHTML && (l[i].innerHTML.toLo"..., exception=exception@entry=0x0) at /build/midori-miV7Xn/midori-0.5.11-ds1/midori/sokoke.c:75
 midori_view_get_related_page (view=view@entry=0x5593f2fa96c0, rel=rel@entry=0x7fbf1eacc680 "prev", local=0x7fbf1ef0f072 <error: Cannot access memory at address 0x7fbf1ef0f072>) at /build/midori-miV7Xn/midori-0.5.11-ds1/midori/midori-view.c:4720