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<html>
<body>
Firefox: <a href="javascript:noCrash()">no crash</a> | <a href="javascript:crash()">crash</a><br/>
<canvas id="foo" width="200" height="200">
</canvas>
<script>
function d(lineWidth){
var c = document.getElementById("foo").getContext("2d")
c.clearRect(0,0,200,200)
c.lineWidth = lineWidth
c.beginPath()
c.arc(100,100,80, Math.PI, 2*Math.PI, 1)
c.stroke()
c.beginPath()
c.arc(50,50, 20, 0, 2*Math.PI, 1)
c.stroke()
c.beginPath()
c.arc(150,50, 20, 0, 2*Math.PI, 1)
c.stroke()
}
function noCrash() {
d(Math.random()*20+5)
}
function crash() {
d( '_' )
}
crash();
</script>
</body>
</html>
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