[Webkit-unassigned] [Bug 153741] REGRESSION(r195899): ASSERTION FAILED: is<Target>(source) in EventPath::retargetTouch() since r195899

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=153741

--- Comment #3 from Carlos Garcia Campos <cgarcia at igalia.com> ---
(In reply to comment #2)
> Comment on attachment 270384 [details]
> Fix an EventContext downcast.
> 
> I didn't look closely at this, but I'm suspicious that there is a downcast
> there if the result of the downcast can be changed without breaking the
> build....

MouseOrFocusEventContext also derives from EventContext, so the cast is valid form the compiler point of view. That's why we have the type traits thing to check the cast is valid at runtime. It ended up calling EventContext::isMouseOrFocusEventContext() that return false, because the concrete type in this case is TouchEventContext.

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