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tubestation/layout/mathml
Matt Woodrow adbcc9920a Bug 1388614 - Make sure MathML display items are unique. r=karlt
FrameLayerBuilder requires the the (frame,per-frame-key) for each display item is unique. It only enforces this in certain situations though, so there's cases where we've gotten away without this.

Retained display lists introduces more situations where we rely on this, so I've found a few.

MathML nsDisplayNotation and nsDisplayMathMLBar are the two fixed by this patch.
2017-08-10 23:26:42 +12:00
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