# Bug
Using elasticsearch 5.3 and scroll API.
```
$path = '_search/scroll';
$this->elasticsearch->setIndex(null)->setType(null);
$this->elasticsearch->request($path, 'POST', [
    'scroll' => '10m',
    'scroll_id' => $scrollId,
])
```
This was generating the following url: `//_search/scroll` with double slashes causing following error:
```
{
    "error": {
        "root_cause": [
            {
                "type": "string_index_out_of_bounds_exception",
                "reason": "String index out of range: 0"
            }
        ],
        "type": "string_index_out_of_bounds_exception",
        "reason": "String index out of range: 0"
    },
    "status": 500
}
```

# Solution
Avoid adding an extra slash when `$this->index` is null.