[Webkit-unassigned] [Bug 42342] New: Font download error for an @font-face rule invalidates other @font-face rules for the same font-family

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=42342

           Summary: Font download error for an @font-face rule invalidates
                    other @font-face rules for the same font-family
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: yuzo at google.com
                CC: mitz at webkit.org, hamaji at chromium.org,
                    hayato at chromium.org


Assume that we have the following file and CannotBeDownloaded.ttf cannot be downloaded
while Ahem.ttf can.

As per http://lists.w3.org/Archives/Public/www-style/2010Jul/0253.html , the first rule
must remain in effect while the second rule must be ignored.

WebKit r63408 ignores both rules.

Note that if
  src: url(CannotBeDownloaded.ttf);
is replaced with
  src: local(NonExistentLocalFont);
or
  src: url(CannotBeDownloaded.ttf), local(Arial);
, the first rule remains in effect and WebKit renders the file properly.


<style>
@font-face {
  font-family:myfont;
  src: url(Ahem.ttf);
}
@font-face {
  font-family:myfont;
  src: url(CannotBeDownloaded.ttf);
  unicode-range: U+30-39;
}
</style>
<p>
The first @font-face rule above should remain in effect
even if the font for the second @font-face rule cannot be downloaded.
Accordingly, the following text should be shown in Ahem.
</p>
<span style="font-family:myfont">
This must be shown in Ahem.
</span>

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