[Webkit-unassigned] [Bug 165092] New: Soft hyphens break kerning

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=165092

            Bug ID: 165092
           Summary: Soft hyphens break kerning
    Classification: Unclassified
           Product: WebKit
           Version: Safari 10
          Hardware: Macintosh
                OS: macOS 10.12
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: iam at stfoo.ru

Created attachment 295492
  --> https://bugs.webkit.org/attachment.cgi?id=295492&action=review
Shy breaks kerning in Safari 10

Soft Hyphens (­ symbol) breaks font's kerning.

Here's an example: http://codepen.io/stfoo/pen/eBGzwW

There is letters pair "AV" that supposed to be kerned. Red ones show text without soft hyphens. First two has kerning switched on, last two — switched off.
Cyan pairs show text with soft hyphens. Kerning for cyan text is always on;

In Safari 10 i see this picture: http://d.pr/i/EPvt. It shows that text with hyphens is equal to text without kerning.
In other browsers (Chrome 54, Firefox 48) it works as intended: http://d.pr/i/t0Us. Soft hyphens are ignored.

Is it a bug?

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