V8 does not create the proper V8Object for feMorphology elements, which can be witnessed by the following test: alert(document.createElementNS("http://www.w3.org/2000/svg", "feMorphology")); You'll see that the returned type is [object SVGElement] instead of [object SVGFEMorphologyElement].
Created attachment 47382 [details] Proposed patch
Comment on attachment 47382 [details] Proposed patch I assume this affects tests? Otherwise we really should make sure we have a test which touches this part of SVG.
Yes, the svg/dom/operatorAttribute.html test touches this, but only under the V8 build. I only found it because the test was failing under Chromium.
Comment on attachment 47382 [details] Proposed patch Normally we should mention that in the ChangeLog. :) Even though the results aren't in webkit.org yet.
Comment on attachment 47382 [details] Proposed patch Clearing flags on attachment: 47382 Committed r53843: <http://trac.webkit.org/changeset/53843>
All reviewed patches have been landed. Closing bug.