gecko-dev/dom/canvas/crashtests/743499-negative-size.html

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HTML

<html>
<head>
<title></title>
<script type="text/javascript">
function go() {
var canvas = document.createElement("canvas");
var ctx = canvas.getContext('2d');
ctx.globalAlpha = 4
ctx.lineCap = "foo"
ctx.strokeRect(256,1024,8,4)
ctx.shadowColor = "black"
ctx.shadowOffsetY = 64
ctx.stroke()
ctx.moveTo(32,1024)
ctx.closePath()
}
</script>
</head>
<body onload="go()">
<canvas id="canvas"></canvas>
</body>
</html>