Contextlib.suppress confuses pylance "Code is unreachable"

[fried]

Environment data

Language Server version: 2020.10.3
OS and version: macOS Catalina 10.15.7
Python version: 3.9.0 (installed via homebrew)

Expected behaviour

https://docs.python.org/3/library/contextlib.html#contextlib.suppress

Actual behaviour

Pylance says the code is unreachable

Code Snippet / Additional information

This example is contrived, but its a simplification I was testing some nested transaction context handlers.
And was supprised that pylance told me the code was unreachable on line 14.

import unittest
from contextlib import suppress

class TransactionError(Exception):
    pass

class TestSomething(unittest.TestCase):
    def test_something(self):
        with suppress(TransactionError):
            raise TransactionError
        self.assertTrue(True)   ### HERE this is grey for being unreachable

[judej]

Dupe of #494