[Webkit-unassigned] [Bug 140653] Layout Test mathml/presentation/mo-invisible.html is flaky

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=140653

Brent Fulgham <bfulgham at webkit.org> changed:

           What    |Removed                     |Added
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                 CC|                            |bfulgham at webkit.org

--- Comment #1 from Brent Fulgham <bfulgham at webkit.org> ---
The GlyphData's fontData member can be nullptr in the case where FontGlyphs::glyphDataForSystemFallback cannot find a suitable font for the desired character.

When this happens, we return a default-constructed GlyphData which has a null internal fontData member.

This member is dereference later, causing a crash.

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