Missing return statement" error misfires on `with` blocks

[eric-wieser]

Bug Report

The "Missing return statement" error misfires on with blocks.

To Reproduce

Create the following python file:

import contextlib

def foo() -> int:
	with contextlib.ExitStack() as stack:
		return 2

Run mypy:

Expected Behavior

There should be no error

Actual Behavior

this_issue.py:3: error: Missing return statement
Found 1 error in 1 file (checked 1 source file)

Your Environment

• Mypy version used: 0.910
• Python version used: 3.8
• Operating system and version: Windows 10

[eric-wieser]

Oh, duplicate of #7726