Make circular symlink error dependent on OS and Python version

aiohttp/web_urldispatcher.py

@@ -7,6 +7,7 @@
 import keyword
 import os
 import re
+import sys
 from contextlib import contextmanager
 from pathlib import Path
 from types import MappingProxyType
@@ -75,6 +76,12 @@
 else:
     BaseDict = dict
 
+CIRCULAR_SYMLINK_ERROR = (
+    OSError
+    if sys.version_info < (3, 10) and sys.platform.startswith("win32")
+    else RuntimeError
+)
+
 YARL_VERSION: Final[Tuple[int, ...]] = tuple(map(int, yarl_version.split(".")[:2]))
 
 HTTP_METHOD_RE: Final[Pattern[str]] = re.compile(
@@ -665,8 +672,7 @@ def _resolve_path_to_response(self, unresolved_path: Path) -> StreamResponse:
             else:
                 file_path = unresolved_path.resolve()
                 file_path.relative_to(self._directory)
-        # TODO(PY39): Remove OSError needed to appease 3.8 on Windows.
-        except (ValueError, RuntimeError, OSError) as error:
+        except (ValueError, CIRCULAR_SYMLINK_ERROR) as error:
             # ValueError for relative check; RuntimeError for circular symlink.
             raise HTTPNotFound() from error