Update _manager.py

src/pluggy/_manager.py

@@ -182,18 +182,17 @@ def parse_hookimpl_opts(self, plugin: _Plugin, name: str) -> HookimplOpts | None
         options for items decorated with :class:`HookimplMarker`.
         """
 
-        # IMPORTANT: accessing an @property can have side effects that we dont want to trigger
-        # if attr is a property, skip it in advance (@property methods can never be hookimpls)
+        # IMPORTANT: @property methods can have side effects, and are never hookimpl
+        # if attr is a property, skip it in advance
         plugin_class = plugin if inspect.isclass(plugin) else type(plugin)
         if isinstance(getattr(plugin_class, name, None), property):
             return None
 
-        # if attr is field on a pydantic model, skip it (pydantic fields are never hookimpls)
-        if hasattr(plugin, "__pydantic_core_schema__") and name in getattr(
-            plugin, "model_fields", {}
-        ):
-            # pydantic can present class attributes, instance attributes, or methods
-            # but none of them can be hookimpls so they throw off the logic below
+        # pydantic model fields are like attrs and also can never be hookimpls
+        plugin_is_pydantic_obj = hasattr(plugin, "__pydantic_core_schema__")
+        if plugin_is_pydantic_obj and name in getattr(plugin, "model_fields", {}):
+            # pydantic models mess with the class and attr __signature__
+            # so inspect.isroutine(...) throws exceptions and cant be used
             return None
 
         method: object = getattr(plugin, name)