[Webkit-unassigned] [Bug 191627] [css-grid] Incorrect track sizing when using relative sized items in 'auto' column tracks

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=191627

--- Comment #14 from zsun at igalia.com ---
Yes, the value might not have been initialized/set. While running the test case here (grid-self-baseline-not-applied-if-sizing-cyclic-dependency-001.html), without the valueOr(), this test crashes and throws "STDERR: ASSERTION FAILED: initialized()".

Would the width be nullopt? I'm just wondering why in RenderGrid::placeItemsOnGrid(), it's initialized as LayoutUnit() rather than LayoutUnit(-1) like the height?

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