facebook/hhvm — pull request #1946 by radford (2014-02-28 23:36:35+00:00)
Title: MysqlResults that have been mysql_free_result()'d should not be valid

In particular now

```php
mysql_free_result($result);
assert(is_resource($result) === false);
```
This is tested for in a still-failing-for-other-reasons Zend test.