[Webkit-unassigned] [Bug 215643] overwriteCodePoint() in createAndFillGlyphPage() is wrong

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=215643

--- Comment #18 from Myles C. Maxfield <mmaxfield at apple.com> ---
Created attachment 435384

  --> https://bugs.webkit.org/attachment.cgi?id=435384&action=review

Test case

This is a test font which has a ligature to map ZWJ + B to the same glyph as p. This ligature works in Chrome and Firefox, but not in WebKit.

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