fix

js/binary/reader.js

@@ -388,7 +388,6 @@ jspb.BinaryReader.prototype.skipFixed64Field = function() {
  * Skips over the next group field in the binary stream.
  */
 jspb.BinaryReader.prototype.skipGroup = function() {
-  // Keep a stack of start-group tags that must be matched by end-group tags.
   var previousField = this.nextField_;
   do {
     if (!this.nextField()) {

js/binary/reader_test.js

@@ -680,6 +680,7 @@ describe('binaryReaderTest', function() {
     var dummyMessage = /** @type {!jspb.BinaryMessage} */({});
     writer.writeGroup(5, dummyMessage, function() {
       writer.writeInt64(42, 42);
+      writer.writeInt64(44, 44);
       writer.writeString(43, 'The quick brown fox jumps over the lazy dog');
       writer.writeGroup(6, dummyMessage, function() {
         writer.writeInt64(84, 42);