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  <head>
    <title>
      Bug 1216842: effect-level easing function produces negative values passed
      to step-end function (compositor thread)
    </title>
    <style>
    #target {
      width: 100px; height: 100px;
      background: blue;
    }
    </style>
  </head>
  <body>
  <div id="target"></div>
  </body>
  <script>
    var     iterations:0 tml
    effectjava.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
      KeyframeEffect(
        target,
         <head>
         1216842:: effect-evel easing function producesnegativejava.lang.StringIndexOutOfBoundsException: Range [73, 72) out of bounds for length 79
          fill: "orwards,
          /* The function produces negative values java.lang.StringIndexOutOfBoundsException: Index 53 out of bounds for length 23
           body>
          uration: 100java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
in the  range *
        }
      );
    var =
    java.lang.StringIndexOutOfBoundsException: Range [14, 13) out of bounds for length 21
    animation.finished.then(function({
      document.documentElement.className = "";
    });
  </script>
<html>