[`http://www.ei.ruhr-uni-bochum.de/media/crypto/veroeffentlichungen/2010/08/08/baileypaaroefjc.pdf`](http://www.ei.ruhr-uni-bochum.de/media/crypto/veroeffentlichungen/2010/08/08/baileypaaroefjc.pdf) is severely mis-rendered by the version of pdf.js bundled with Firefox 38.0.5:

![screen shot of misrendered PDF using pdf.js](https://cloud.githubusercontent.com/assets/325899/8235479/3876046e-15b0-11e5-97c0-ecbb5d9f8ee8.png)

You can see that practically every word has some blanks where letters should be.

Note that Adobe Reader (11.0.09) does a _better_ job of rendering but still has many missing characters, and throws up an error message about a font that it "cannot extract", so the PDF itself may be ill-formed (in which case pdf.js should give an error message too).

![screen shot of the same PDF with Adobe Reader 11.0.09](https://cloud.githubusercontent.com/assets/325899/8235615/da33e866-15b0-11e5-96a2-8b9f15c6f74d.png)

let pos = 0;
      function parseOperand() {
        let value = dict[pos++];
        if (value === 30) {
          return parseFloatOperand();
        } else if (value === 28) {
          value = dict[pos++];
          value = ((value << 24) | (dict[pos++] << 16)) >> 16;
          return value;
        } else if (value === 29) {
          value = dict[pos++];
          value = (value << 8) | dict[pos++];
          value = (value << 8) | dict[pos++];
          value = (value << 8) | dict[pos++];
          return value;
        } else if (value >= 32 && value <= 246) {
          return value - 139;
        } else if (value >= 247 && value <= 250) {
          return (value - 247) * 256 + dict[pos++] + 108;
        } else if (value >= 251 && value <= 254) {
          return -((value - 251) * 256) - dict[pos++] - 108;
        }
        warn('CFFParser_parseDict: "' + value + '" is a reserved command.');
        return NaN;
      }
      function parseFloatOperand() {