Program: 55307
Project: 55307
Buggy source:
@Nullable @Override public ModificationIterator acquireModificationIterator(final byte remoteIdentifier){
  final EngineModificationIterator instance=engineReplicationLang.acquireEngineModificationIterator(remoteIdentifier);
  return new ModificationIterator(){
    @Override public void forEach(    @NotNull Consumer<ReplicationEntry> consumer){
      while (hasNext()) {
        nextEntry(entry -> {
          consumer.accept(entry);
          return true;
        }
);
      }
    }
    public boolean hasNext(){
      return instance.hasNext();
    }
    public boolean nextEntry(    @NotNull Consumer<ReplicationEntry> consumer){
      return nextEntry(entry -> {
        consumer.accept(entry);
        return true;
      }
);
    }
    boolean nextEntry(    @NotNull final EntryCallback callback){
      return instance.nextEntry((key,value,timestamp,identifier,isDeleted,bootStrapTimeStamp) -> callback.onEntry(new VanillaReplicatedEntry(toKey(key),toValue(value),timestamp,identifier,isDeleted,bootStrapTimeStamp,remoteIdentifier)));
    }
    private Bytes toKey(    final @NotNull net.openhft.lang.io.Bytes key){
      NativeBytesStore<Void> byteStore=NativeBytesStore.nativeStoreWithFixedCapacity(key.remaining());
      int i=(int)key.position();
      while (key.remaining() > 0) {
        byteStore.writeByte(i++,(byte)key.readByte());
      }
      return byteStore.bytesForRead();
    }
    @Nullable private Bytes<Void> toValue(    final @Nullable net.openhft.lang.io.Bytes value){
      if (value == null)       return null;
      NativeBytesStore<Void> byteStore=NativeBytesStore.nativeStoreWithFixedCapacity(value.remaining());
      int i=(int)value.position();
      while (value.remaining() > 0) {
        byteStore.writeByte(i++,(byte)value.readByte());
      }
      return byteStore.bytesForRead();
    }
    @Override public void dirtyEntries(    final long fromTimeStamp){
      instance.dirtyEntries(fromTimeStamp);
    }
    @Override public void setModificationNotifier(    @NotNull final ModificationNotifier modificationNotifier){
      instance.setModificationNotifier(modificationNotifier::onChange);
    }
  }
;
}

Fixed version (ground truth):
@Nullable @Override public ModificationIterator acquireModificationIterator(final byte remoteIdentifier){
  final EngineModificationIterator instance=engineReplicationLang.acquireEngineModificationIterator(remoteIdentifier);
  return new ModificationIterator(){
    @Override public void forEach(    @NotNull Consumer<ReplicationEntry> consumer){
      while (hasNext()) {
        nextEntry(entry -> {
          consumer.accept(entry);
          return true;
        }
);
      }
    }
    public boolean hasNext(){
      return instance.hasNext();
    }
    public boolean nextEntry(    @NotNull Consumer<ReplicationEntry> consumer){
      return nextEntry(entry -> {
        consumer.accept(entry);
        return true;
      }
);
    }
    boolean nextEntry(    @NotNull final EntryCallback callback){
      return instance.nextEntry((key,value,timestamp,identifier,isDeleted,bootStrapTimeStamp) -> callback.onEntry(new VanillaReplicatedEntry(toKey(key),toValue(value),timestamp,identifier,isDeleted,bootStrapTimeStamp,remoteIdentifier)));
    }
    private Bytes toKey(    final @NotNull net.openhft.lang.io.Bytes key){
      final long position=key.position();
      try {
        NativeBytesStore<Void> byteStore=NativeBytesStore.nativeStoreWithFixedCapacity(key.remaining());
        int i=(int)key.position();
        while (key.remaining() > 0) {
          byteStore.writeByte(i++,key.readByte());
        }
        return byteStore.bytesForRead();
      }
  finally {
        key.position(position);
      }
    }
    @Nullable private Bytes<Void> toValue(    final @Nullable net.openhft.lang.io.Bytes value){
      if (value == null)       return null;
      final long position=value.position();
      try {
        NativeBytesStore<Void> byteStore=NativeBytesStore.nativeStoreWithFixedCapacity(value.remaining());
        int i=(int)value.position();
        while (value.remaining() > 0) {
          byteStore.writeByte(i++,value.readByte());
        }
        return byteStore.bytesForRead();
      }
  finally {
        value.position(position);
      }
    }
    @Override public void dirtyEntries(    final long fromTimeStamp){
      instance.dirtyEntries(fromTimeStamp);
    }
    @Override public void setModificationNotifier(    @NotNull final ModificationNotifier modificationNotifier){
      instance.setModificationNotifier(modificationNotifier::onChange);
    }
  }
;
}