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http://w3c-test.org/webapps/DOMCore/tests/submissions/Ms2ger/Node-replaceChild.html It appears that only Opera throws a NotFoundError. IE10/Gecko/Chrome throw HierarchyRequestError.
I do not mind swapping this somehow. Any ideas? Does this overlap with bug 18581 by any chance?
(In reply to comment #1) > Does this overlap with bug 18581 by any chance? Not really
https://github.com/whatwg/dom/commit/ac8c9a80d5f75483ec8518a0e8453c4116ac13b6 Spec fixed.
https://dvcs.w3.org/hg/webapps/rev/3f51cbda4cf6