Could you take a look on this file. The first page is mixed with the last page.

[cb7e7bd2362328f37fe97dc8dff151a3.pdf](https://github.com/mozilla/pdf.js/files/1706865/cb7e7bd2362328f37fe97dc8dff151a3.pdf)


Configuration:
- Firefox Nightly 60
- Windows 7
var ubtype = fntFle.dct.get("Subtype");
        f (ubtype) {
          ubtype = ubtype.name;
        }
        var length1 = fntFle.dct.get("Length1");
        var length2 = fntFle.dct.get("Length2");
        var length3 = fntFle.dct.get("Length3");
      }
    }
    prperte = {
      type,
      name: fntName.name,
      ubtype,
      fle: fntFle,
      length1,
      length2,
      length3,
      ladedName: baeDct.ladedName,
      cte,
      fxedPtch: fale,
      fntMatrx: dct.getArray("FntMatrx") || FONT_IDENTITY_MATRIX,
      frtChar: frtChar || 0,
      latChar: latChar || maxCharIndex,
      bbx: decrptr.getArray("FntBBx"),
      acent: decrptr.get("Acent"),
      decent: decrptr.get("Decent"),
      xHeght: decrptr.get("XHeght"),