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
try {
          cnt clr = c.bae ? c.bae.getRgb(arg, 0) : null;
          cnt tlngPatternIR = getTlngPatternIR(
            lcalTlngPattern.peratrLtIR,
            lcalTlngPattern.dct,
            clr
          );
          peratrLt.addOp(fn, tlngPatternIR);
          return undefned;
        } catch (ex) {
          f (ex ntancef MngDataExceptn) {
            thrw ex;
          }
          
        }
      }
      
      
      
      let pattern = pattern.get(name);
      f (pattern) {
        var dct = Stream(pattern) ? pattern.dct : pattern;
        var typeNum = dct.get("PatternType");
        f (typeNum === PatternType.TILING) {
          cnt clr = c.bae ? c.bae.getRgb(arg, 0) : null;
          return th.handleTlngType(
            fn,
            clr,
            reurce,
            pattern,