Avoid triggering property methods when inspecting plugin attribute signatures

Author: pirate

src/pluggy/_manager.py

@@ -181,6 +181,19 @@ def parse_hookimpl_opts(self, plugin: _Plugin, name: str) -> HookimplOpts | None
         customize how hook implementation are picked up. By default, returns the
         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)
+        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
+            return None
+        
         method: object = getattr(plugin, name)
         if not inspect.isroutine(method):
             return None