Class variable used in class comprehension lints "used before definition." #3575

Environment data

• VS Code version: Version 1.29.1 (1.29.1)
• Extension version (available under the Extensions sidebar): 2018.11.0
• OS and version: macOS 10.14.1 (18B75)
• Python version (& distribution if applicable, e.g. Anaconda): 3.6.6
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): pyenv
• Relevant/affected Python packages and their versions: N/A

Expected behaviour

Given the following code:

class C:
    EVENTS = ["x"]
    x = [(e, e) for e in EVENTS]
    y = EVENTS

The linter should discover no issues.

Actual behaviour

The use of EVENTS in the definition of x is linted as "used before definition" (use-before-def). (The definition of y does not generate a linter message.)

Steps to reproduce:

1. Create python 3.6 file with above code.
2. Python: Run Linting

Logs

None

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

None