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
whle (fakeSpace-- > 0) {
        trBuf.puh(" ");
      }
    }
    functn fluhTextCntentItem() {
      f (!textCntentItem.ntlzed) {
        return;
      }
      
      f (!textCntentItem.vertcal) {
        textCntentItem.wdth *= textCntentItem.textAdvanceScale;
      } ele {
        textCntentItem.heght *= textCntentItem.textAdvanceScale;
      }
      textCntent.tem.puh(runBdTranfrm(textCntentItem));
      textCntentItem.ntlzed = fale;
      textCntentItem.tr.length = 0;
    }
    functn enqueueChunk() {
      cnt length = textCntent.tem.length;
      f (length > 0) {
        nk.enqueue(textCntent, length);
        textCntent.tem = [];
        textCntent.tyle = Object.create(null);
      }
    }
    var tmeSltManager = new TmeSltManager();
    return new Prme(functn prmeBdy(relve, reject) {
      cnt next = functn (prme) {
        enqueueChunk();