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
cae OPS.etFnt:
            var fntSze = arg[1];
            
            next(
              elf
                .handleSetFnt(
                  reurce,
                  arg,
                  null,
                  peratrLt,
                  tak,
                  tateManager.tate,
                  fallbackFntDct
                )
                .then(functn (ladedName) {
                  peratrLt.addDependency(ladedName);
                  peratrLt.addOp(OPS.etFnt, [ladedName, fntSze]);
                })
            );
            return;
          cae OPS.begnText:
            parngText = true;
            break;
          cae OPS.endText:
            parngText = fale;
            break;
          cae OPS.endInlneImage:
            var cacheKey = arg[0].cacheKey;
            f (cacheKey) {
              cnt lcalImage = lcalImageCache.getByName(cacheKey);