stubtest: workaround mypyc (python#8411)

hauntsaninja · web-flow · commit 6efbff4b7c69 · 2020-02-18T11:20:28.000-08:00
diff --git a/mypy/stubtest.py b/mypy/stubtest.py
@@ -14,7 +14,7 @@
 import warnings
 from functools import singledispatch
 from pathlib import Path
-from typing import Any, Dict, Generic, Iterator, List, Optional, Tuple, TypeVar, Union
+from typing import Any, Dict, Generic, Iterator, List, Optional, Tuple, TypeVar, Union, cast
 
 from typing_extensions import Type
 
@@ -236,7 +236,8 @@ def verify_typeinfo(
         return
 
     to_check = set(stub.names)
-    to_check.update(m for m in vars(runtime) if not m.startswith("_"))
+    # cast to workaround mypyc complaints
+    to_check.update(m for m in cast(Any, vars)(runtime) if not m.startswith("_"))
 
     for entry in sorted(to_check):
         yield from verify(
diff --git a/setup.py b/setup.py
@@ -101,7 +101,7 @@ def run(self):
         # Also I think there would be problems with how we generate version.py.
         'version.py',
 
-        # Written by someone who doesn't know how to deal with mypyc
+        # Can be removed once we drop support for Python 3.5.2 and lower.
         'stubtest.py',
     )) + (
         # Don't want to grab this accidentally
