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
return;
                    }
                    f (elf.ptn.gnreErrr) {
                      elf.handler.end("UnupprtedFeature", {
                        featureId: UNSUPPORTED_FEATURES.errrMarkedCntent,
                      });
                      warn(
                        `getOperatrLt - gnrng begnMarkedCntentPrp: "${rean}".`
                      );
                      return;
                    }
                    thrw rean;
                  })
              );
              return;
            }
            
            arg = [arg[0].name];
            break;