Program: 33289
Project: 33289
Buggy source:
@Override public SerializerResult referenceCollection(final ServiceMetadata metadata,final EdmEntitySet edmEntitySet,final EntityCollection entityCollection,final ReferenceCollectionSerializerOptions options) throws SerializerException {
  CircleStreamBuffer buffer=null;
  SerializerException cachedException=null;
  try {
    final ContextURL contextURL=checkContextURL(options == null ? null : options.getContextURL());
    buffer=new CircleStreamBuffer();
    final UriHelper uriHelper=new UriHelperImpl();
    final JsonGenerator json=new JsonFactory().createGenerator(buffer.getOutputStream());
    json.writeStartObject();
    writeContextURL(contextURL,json);
    if (options != null && options.getCount() != null && options.getCount().getValue()) {
      writeCount(entityCollection,json);
    }
    json.writeArrayFieldStart(Constants.VALUE);
    for (    final Entity entity : entityCollection.getEntities()) {
      json.writeStartObject();
      json.writeStringField(Constants.JSON_ID,uriHelper.buildCanonicalURL(edmEntitySet,entity));
      json.writeEndObject();
    }
    json.writeEndArray();
    writeNextLink(entityCollection,json);
    json.writeEndObject();
    json.close();
    buffer.getOutputStream().close();
    return SerializerResultImpl.with().content(buffer.getInputStream()).build();
  }
 catch (  final IOException e) {
    cachedException=new SerializerException("String_Node_Str",e,SerializerException.MessageKeys.IO_EXCEPTION);
    throw cachedException;
  }
 finally {
    closeCircleStreamBufferOutput(buffer,cachedException);
  }
}

Fixed version (ground truth):
@Override public SerializerResult referenceCollection(final ServiceMetadata metadata,final EdmEntitySet edmEntitySet,final EntityCollection entityCollection,final ReferenceCollectionSerializerOptions options) throws SerializerException {
  OutputStream outputStream=null;
  SerializerException cachedException=null;
  try {
    final ContextURL contextURL=checkContextURL(options == null ? null : options.getContextURL());
    CircleStreamBuffer buffer=new CircleStreamBuffer();
    final UriHelper uriHelper=new UriHelperImpl();
    outputStream=buffer.getOutputStream();
    final JsonGenerator json=new JsonFactory().createGenerator(outputStream);
    json.writeStartObject();
    writeContextURL(contextURL,json);
    if (options != null && options.getCount() != null && options.getCount().getValue()) {
      writeCount(entityCollection,json);
    }
    json.writeArrayFieldStart(Constants.VALUE);
    for (    final Entity entity : entityCollection.getEntities()) {
      json.writeStartObject();
      json.writeStringField(Constants.JSON_ID,uriHelper.buildCanonicalURL(edmEntitySet,entity));
      json.writeEndObject();
    }
    json.writeEndArray();
    writeNextLink(entityCollection,json);
    json.writeEndObject();
    json.close();
    outputStream.close();
    return SerializerResultImpl.with().content(buffer.getInputStream()).build();
  }
 catch (  final IOException e) {
    cachedException=new SerializerException("String_Node_Str",e,SerializerException.MessageKeys.IO_EXCEPTION);
    throw cachedException;
  }
 finally {
    closeCircleStreamBufferOutput(outputStream,cachedException);
  }
}