Merge pull request #4971 from yurydelendik/rm-suppressEncryption

Removes error catch from fetchUncompressed()

src/core/obj.js

@@ -1216,15 +1216,7 @@ var XRef = (function XRefClosure() {
         error('bad XRef entry');
       }
       if (this.encrypt && !suppressEncryption) {
-        try {
-          xrefEntry = parser.getObj(this.encrypt.createCipherTransform(num,
-                                                                       gen));
-        } catch (ex) {
-          // Almost all streams must be encrypted, but sometimes
-          // they are not, probably due to some broken generators.
-          // Retrying without encryption...
-          return this.fetch(ref, true);
-        }
+        xrefEntry = parser.getObj(this.encrypt.createCipherTransform(num, gen));
       } else {
         xrefEntry = parser.getObj();
       }

src/core/parser.js

@@ -18,7 +18,7 @@
            FlateStream, isArray, isCmd, isDict, isInt, isName, isNum, isRef,
            isString, Jbig2Stream, JpegStream, JpxStream, LZWStream, Name,
            NullStream, PredictorStream, Ref, RunLengthStream, warn, info,
-           StreamType */
+           StreamType, MissingDataException */
 
 'use strict';
 
@@ -344,6 +344,7 @@ var Parser = (function ParserClosure() {
       if (stream.dict.get('Length') === 0) {
         return new NullStream(stream);
       }
+      try {
         var xrefStreamStats = this.xref.stats.streamTypes;
         if (name == 'FlateDecode' || name == 'Fl') {
           xrefStreamStats[StreamType.FLATE] = true;
@@ -396,6 +397,13 @@ var Parser = (function ParserClosure() {
         }
         warn('filter "' + name + '" not supported yet');
         return stream;
+      } catch (ex) {
+        if (ex instanceof MissingDataException) {
+          throw ex;
+        }
+        warn('Invalid stream: \"' + ex + '\"');
+        return new NullStream(stream);
+      }
     }
   };