Fix

src/assets/www/pdfjs/build/pdf.worker.js

@@ -56297,6 +56297,8 @@ function () {
   _createClass(PDFWorkerStream, [{
     key: "getFullReader",
     value: function getFullReader() {
+
+      console.log('getFullReader')
       (0, _util.assert)(!this._fullRequestReader);
       this._fullRequestReader = new PDFWorkerStreamReader(this._msgHandler);
       return this._fullRequestReader;
@@ -56304,6 +56306,8 @@ function () {
   }, {
     key: "getRangeReader",
     value: function getRangeReader(begin, end) {
+      
+      console.log('getRangeReader')
       var reader = new PDFWorkerStreamRangeReader(begin, end, this._msgHandler);
 
       this._rangeRequestReaders.push(reader);