Intellisense for `sys` fails with new analysis engine

```python
import os
import sys
```

Intellisense is available for `os.`, but not for `sys.`
When you type `sys.`, the following error is logged in the python console:
```
[Error - 11:36:51 AM] Request textDocument/completion failed.
  Message: Length cannot be less than zero.
Parameter name: length
  Code: -32000 
[object Object]
```