[Webkit-unassigned] [Bug 235656] New: Blocked link to font source does not emit error event

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=235656

            Bug ID: 235656
           Summary: Blocked link to font source does not emit error event
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: pgriffis at igalia.com

There are a couple of WPT tests that rely on the onerror handler being called when a font source is blocked by CSP.

They can be seen here: https://wpt.fyi/results/content-security-policy/font-src?label=master&label=experimental&product=safari&product=webkitgtk

But a snippet is:

      var link = document.createElement('link');
      link.rel="preload";
      link.as="font";
      link.href="http://{{hosts[alt][]}}:{{ports[http][0]}}/fonts/Ahem.ttf?font-none-blocked";
      link.onload = t.unreached_func("Should not have loaded the font.");
      link.onerror = t.step_func_done();
      document.getElementsByTagName('head')[0].appendChild(link);

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