[`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 out;
    const numGlyphsLessNotDef = numGlyphs - 1;
    if (isCIDFont) {
      
      
      out = new Uint8Array([
        2, 
        0, 
        0, 
        (numGlyphsLessNotDef >> 8) & 0xff,
        numGlyphsLessNotDef & 0xff,
      ]);
    } else {
      const length = 1 + numGlyphsLessNotDef * 2;
      out = new Uint8Array(length);
      out[0] = 0; 
      let charsetIndex = 0;
      const numCharsets = charset.charset.length;
      let warned = false;
      for (let i = 1; i < out.length; i += 2) {
        let sid = 0;
        if (charsetIndex < numCharsets) {