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Test Info:

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<script>
function boom()
{
var canvas = document.createElement('canvas');
var ctx = canvas.getContext('2d');
ctx.setLineDash([-1]);
ctx.isPointInStroke(0, 0);
}
</script>
</head>
<body onload="boom();"></body>
</html>