[Webkit-unassigned] [Bug 167374] New: ZWJ is stripped when placed in front of a text, just on a particular font

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=167374

            Bug ID: 167374
           Summary: ZWJ is stripped when placed in front of a text, just
                    on a particular font
    Classification: Unclassified
           Product: WebKit
           Version: Safari 10
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Text
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ebraminio at gmail.com
                CC: mmaxfield at apple.com

Open:

data:text/html;charset=utf8,<link%20rel="stylesheet"%20media="screen"%20href="https://fontlibrary.org/face/iranian-sans"%20type="text/css"/><span%20style="font-family:'Iranian%20Sans';%20font-size:%20300%">&zwj;%D9%85</span>

Actual:
ZWJ has not any effect, it is like you remove "&zwj;" from above test case

Expected:
Like Chrome and Firefox, ZWJ should effect shape of next character.

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