[Webkit-unassigned] [Bug 257279] ASSERTION FAILED: rootRenderer.isDocumentElementRenderer() for fast/body-propagation/background-image/007-xhtml.xhtml

Wed May 24 14:27:05 PDT 2023

https://bugs.webkit.org/show_bug.cgi?id=257279

--- Comment #2 from Fujii Hironori <Hironori.Fujii at sony.com> ---
This code is assuming the parent of <body> is <html>. But, it's <bogus> in the tests.

I think we should copy the following code from RenderElement::styleWillChange.
https://github.com/WebKit/WebKit/blob/48c6a9eda4fdc93834a69222bd4db466c7b94e52/Source/WebCore/rendering/RenderElement.cpp#L882
> bool drawsRootBackground = isDocumentElementRenderer() || (isBody() && !rendererHasBackground(document().documentElement()->renderer()));

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