microsoft/vscode-python#2637

Check out scikit-learn, open a Python file to start the extension, hit ctrl+t and search for KMeans. You should end up in sklearn/cluster/k_means_.py at the class KMeans class. But instead you end up with an error of:

[Error - 3:48:02 PM] Request workspace/symbol failed.
  Message: Object reference not set to an instance of an object.
  Code: -32000 
[object Object]

I tried setting "python.analysis.logLevel": "Trace" but I didn't see anything useful to help with this.