Minimal test case to replicate linux firefox 27 bug

badfillrule.html

<canvas id="c"></canvas>
<script>
  var c = document.getElementById('c');
  var ctx = c.getContext('2d');
  ctx.transform(10, 0, 0, 10, 0, 0);
  ctx.rect(10, 5, 1, 1);
  ctx.fillStyle = 'red';
  // ctx.mozFillRule = 'evenodd'; // also bad
  // ctx.fill(); // okay
  ctx.fill('evenodd');
  ctx.strokeStyle = 'green';
  ctx.strokeWidth = 1;
  ctx.stroke();
</script>