vscode-python: Autocompletion per PEP 526 Type Annotations Not Working For List[x] where x is int, str, etc...

Environment data

• VS Code version: 1.26.1
• Extension version (available under the Extensions sidebar): 2018.7.1
• OS and version: macOS 10.13.6
• Python version (& distribution if applicable, e.g. Anaconda): 3.7.0 (pyenv, miniconda)
• Type of virtual environment used (N/A | venv | virtualenv | conda | …): conda, pyenv
• Relevant/affected Python packages and their versions: NA

Actual behavior

Type hinting not working for some PEP 526 style annotations (in my case List[?] does not work)

Expected behavior

Type hinting to recognize variable type annotations in the function declaration. Screenshot below of what I would expect from above (note in the function declaration I did not specify the type in the list).

Steps to reproduce:

1. Create new python file

2. Specify any Python 3.6+ interpretter

3. fill out

   from typing import List
   
   def foo(a: List[int]):
      a.# now wait for auto-complete
   

Logs

Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)

Starting Microsoft Python language server.
[Info  - 3:56:19 PM] Created Microsoft.PythonTools.Interpreter.Ast.AstPythonInterpreter instance from Microsoft.PythonTools.Interpreter.Ast.AstPythonInterpreterFactory
Initializing for /Users/ogi/.pyenv/versions/miniconda3-latest/bin/python
[Info  - 3:57:41 PM] Found 198 completions for file:///Users/ogi/Academic/CS532/demo/test.py at (1, 2) after filtering
[Info  - 3:57:42 PM] Found 334 completions for file:///Users/ogi/Academic/CS532/demo/test.py at (1, 7) after filtering
[Info  - 3:57:43 PM] Found 1 completions for file:///Users/ogi/Academic/CS532/demo/test.py at (1, 14) after filtering
[Info  - 3:57:44 PM] Found 119 completions for file:///Users/ogi/Academic/CS532/demo/test.py at (1, 21) after filtering
[Info  - 3:57:45 PM] Found 119 completions for file:///Users/ogi/Academic/CS532/demo/test.py at (1, 21) after filtering
[Info  - 3:57:47 PM] Found 199 completions for file:///Users/ogi/Academic/CS532/demo/test.py at (3, 2) after filtering
[Info  - 3:57:50 PM] Found 182 completions for file:///Users/ogi/Academic/CS532/demo/test.py at (3, 13) after filtering
[Info  - 3:57:52 PM] Found 182 completions for file:///Users/ogi/Academic/CS532/demo/test.py at (3, 18) after filtering
[Info  - 3:57:54 PM] Found 204 completions for file:///Users/ogi/Academic/CS532/demo/test.py at (4, 6) after filtering
[Info  - 3:57:54 PM] Found 2 completions for file:///Users/ogi/Academic/CS532/demo/test.py at (4, 7) after filtering

Output from Console under the Developer Tools panel (toggle Developer Tools on under Help)

workbench.main.js:sourcemap:1397  INFO no standard startup: panel is active
workbench.main.js:sourcemap:4188 Overwriting grammar scope name to file mapping for scope source.swift.
Old grammar file: file:///Applications/Visual%20Studio%20Code.app/Contents/Resources/app/extensions/swift/syntaxes/swift.tmLanguage.json.
New grammar file: file:///Users/ogi/.vscode/extensions/Kasik96.swift-0.0.3/syntaxes/swift.tmLanguage
e.register @ workbench.main.js:sourcemap:4188
workbench.main.js:sourcemap:1398   ERR Illegal argument: character must be non-negative: Error: Illegal argument: character must be non-negative
    at Object.t.illegalArgument (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:95:675)
    at new e (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:472:92)
    at e.translate (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:473:725)
    at getPrecedingRange (/Users/ogi/.vscode/extensions/njpwerner.autodocstring-0.2.3/src/extension.ts:55:39)
    at processEnter (/Users/ogi/.vscode/extensions/njpwerner.autodocstring-0.2.3/src/extension.ts:41:17)
    at activateOnEnter (/Users/ogi/.vscode/extensions/njpwerner.autodocstring-0.2.3/src/extension.ts:35:9)
    at context.subscriptions.push.vs.workspace.onDidChangeTextDocument.changeEvent (/Users/ogi/.vscode/extensions/njpwerner.autodocstring-0.2.3/src/extension.ts:23:34)
    at e.fire (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:98:218)
    at e.$acceptModelChanged (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:728:571)
    at e._doInvokeHandler (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:671:983)
    at e._invokeHandler (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:671:701)
    at e._receiveRequest (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:670:767)
    at e._receiveOneMessage (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:670:536)
    at /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:669:452
    at /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:672:575
    at /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:96:903
    at e.fire (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:98:218)
    at a (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:162:713)
    at Socket._socketDataListener (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:162:932)
    at emitOne (events.js:116:13)
    at Socket.emit (events.js:211:7)
    at addChunk (_stream_readable.js:263:12)
    at readableAddChunk (_stream_readable.js:250:11)
    at Socket.Readable.push (_stream_readable.js:208:10)
    at Pipe.onread (net.js:594:20)
2workbench.main.js:sourcemap:1398   ERR Cannot read property 'map' of null: TypeError: Cannot read property 'map' of null
    at asCompletionResult (/Users/ogi/.vscode/extensions/ms-python.python-2018.7.1/node_modules/vscode-languageclient/lib/protocolConverter.js:145:51)
    at <anonymous>