Enable report-deprecated-as-error

Author: cdce8p

homeassistant/runner.py

@@ -81,7 +81,7 @@ def __init__(self, debug: bool) -> None:
         """Init the event loop policy."""
         super().__init__()
         self.debug = debug
-        self._watcher: asyncio.AbstractChildWatcher | None = None
+        self._watcher: asyncio.AbstractChildWatcher | None = None  # type: ignore[deprecated]  # Python 3.14
 
     def _init_watcher(self) -> None:
         """Initialize the watcher for child processes.

mypy.ini

@@ -11,6 +11,7 @@ follow_imports = normal
 local_partial_types = true
 strict_equality = true
 no_implicit_optional = true
+report_deprecated_as_error = true
 warn_incomplete_stub = true
 warn_redundant_casts = true
 warn_unused_configs = true

script/hassfest/mypy_config.py

@@ -43,6 +43,7 @@
     "local_partial_types": "true",
     "strict_equality": "true",
     "no_implicit_optional": "true",
+    "report_deprecated_as_error": "true",
     "warn_incomplete_stub": "true",
     "warn_redundant_casts": "true",
     "warn_unused_configs": "true",