Assertion failure: obj == GetOuterObject(cx, obj) with cross-compartment wrapper

[Ms2ger]

<script>
function f() {}
</script>
<iframe src=b.html></iframe>

b.html:

<script>
window.top.f()
</script>

[pcwalton]

<jdm> pcwalton: I suspect http://mxr.mozilla.org/servo/source/components/script/dom/bindings/utils.rs#683

[nox]

I get a security error now.