1. Navigate to webkit.org
2. Open inspector
3. Switch to Resources panel, choose main resource
4. Position mouse over the panel with the line numbers
5. Scroll the wheel
6. Observe DISPATCH_REQUEST_ERR in the console, thrown upon an attempt to dispatchEvent() of a WheelEvent that is currently being dispatched (oding so is against DOM 3 Event spec)
This regressed after r90972.
Created attachment 106595 [details]
Comment on attachment 106595 [details]
View in context: https://bugs.webkit.org/attachment.cgi?id=106595&action=review
> + var clone = document.createEvent("WheelEvent");
Could you describe in the changelog why we need to clone the event here?
Manually committed r94749: http://trac.webkit.org/changeset/94749