GAE中的clearstatcache（）无法正常工作

Unable to call google\appengine\ext\cloud_storage_streams\CloudStorageClient::clearStatCache()

GAE version 1.9.18.189, Mac OS

1. Download and unpack zip package

2. Run dev_appserver.py

   ~google_appengine/dev_appserver.py --skip_sdk_update_check --port 8084 --admin_port 9004 --php_executable_path /usr/local/bin/php-cgi ~my_application