[Webkit-unassigned] [Bug 225339] New: [css-flexbox] Wrong height of an empty table inside an orthogonal flex parent

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=225339

            Bug ID: 225339
           Summary: [css-flexbox] Wrong height of an empty table inside an
                    orthogonal flex parent
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: felipeerias at igalia.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

Failing test:

  imported/w3c/web-platform-tests/css/css-flexbox/table-as-item-specified-height.html

The flex box has vertical flow and the child table has horizontal writing direction, which means that the logical width for the flex box is the logical height for the child.

But since the table is empty, the logical height calculated by RenderTable::layout() is just the "height" property. This value is stored as the child's intrinsic content logical height.

Later on, RenderFlexibleBox::adjustChildSizeForMinAndMax() will try to find the child's min height through computeMainAxisExtentForChild(). Since the child's direction is orthogonal to the flexbox's direction, this will be done with a simple call to computeContentLogicalHeight() passing the previously cached value as the child's intrinsic content height.

Because that cached value is assumed to be correct (even though the table is actually empty and could be shorter) the final flexbox layout is wrong.

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