Layout problem related flex

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• I have searched existing issues and this is not a duplicate

Issues and Steps to Reproduce

Replaces this with steps to repro your issue.

Using such code to test.

const YGConfigRef config = YGConfigNew();

const YGNodeRef root = YGNodeNewWithConfig(config);
YGNodeStyleSetWidth(root, 750);

const YGNodeRef root_child0 = YGNodeNewWithConfig(config);
YGNodeStyleSetPosition(root_child0, YGEdgeBottom, 0);
// I want root_child0 to layout its children horizontally and expand itself to 2 * 750 width
YGNodeStyleSetFlexDirection(root_child0, YGFlexDirectionRow);
YGNodeStyleSetPositionType(root_child0, YGPositionTypeAbsolute);
YGNodeStyleSetPosition(root_child0, YGEdgeTop, 0);
YGNodeInsertChild(root, root_child0, 0);

const YGNodeRef root_child1= YGNodeNewWithConfig(config);
YGNodeStyleSetFlex(root_child1, 1);
YGNodeStyleSetWidth(root_child1, 750);
YGNodeInsertChild(root_child0, root_child1, 0);

const YGNodeRef root_child2= YGNodeNewWithConfig(config);
YGNodeStyleSetFlex(root_child2, 1);
YGNodeStyleSetWidth(root_child2, 750);
YGNodeInsertChild(root_child0, root_child2, 0);

YGNodeCalculateLayout(root, 750, 2000, YGDirectionLTR);

printf("w root_child0: %f", YGNodeLayoutGetWidth(root_child0));

YGNodeFreeRecursive(root);
YGConfigFree(config);

Expected Behavior

Describe what you expected would happen.

Width of root_child0 after layout should be 2 * 750

Actual Behavior

Describe what actually happened.

Width of root_child0 after layout is 0.

If I didn't set flex to 1 for root_child1 and root_child2, the layout would be correct. But on browser, with or without flex to 1, width of root_child0 is always 2 * 750.

Link to Code

If you have some code that maintainers can clone/test for themselves, bugs can be resolved much faster. Please paste a link here.

When applicable, use this fiddle to post a web repro.

Start by reproducing the provided YGNode C API snippet, comparing layout with and without flex set on root_child1 and root_child2. Trace the flex and absolute-position layout entry points that handle these nodes; done means root_child0 reports a width of 1500 when both children use flex.