[Webkit-unassigned] [Bug 204527] Nullptr crash in RenderLayoutState::pageLogicalHeight const

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=204527

--- Comment #12 from Ryosuke Niwa <rniwa at webkit.org> ---
(In reply to zalan from comment #10)
> (In reply to Ryosuke Niwa from comment #9)
> > Wait a minute, why are we calling into RenderTable::layout inside
> > RenderLayer::updateLayerPositionsAfterLayout? That doesn't seem right.
>
> It looks like the grid believes we are pre-layout (meaning that we are in
> the preferred width computation phase). Either some hasDirtyPreferredWidth
> bits got lost or the grid was not laid out the first place (was not dirty)
> and we are laying it out now. Anyway that's why we need a test reduction so
> that we can debug this in a comprehensible context.

Yeah, it appears that something is going south here regarding grid's preferred with computation. It shouldn't be dirty while we're positioning layers in updateLayerPositionsAfterLayout.

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