My plan is simple: we catch the type error.

wyattscarpenter · wyattscarpenter · commit 502ec62458da · 2025-08-14T15:16:53.000-07:00
diff --git a/mypy/config_parser.py b/mypy/config_parser.py
@@ -635,7 +635,7 @@ def parse_section(
             else:
                 print(f"{prefix}Don't know what type {key} should have", file=stderr)
                 continue
-        except ValueError as err:
+        except (ValueError, TypeError) as err:
             print(f"{prefix}{key}: {err}", file=stderr)
             continue
         if key == "strict":
