Prevent instance attributes from shadowing typed capability methods

crates/objects/src/store.rs

@@ -12,6 +12,9 @@ pub struct ObjectStore {
     pub(crate) heap: Heap,
     function_type: Option<WeakObjectRef>,
     pub(crate) field_type_checks: bool,
+    pub(crate) active_attribute_checks: std::sync::Mutex<
+        std::collections::HashMap<std::thread::ThreadId, std::collections::BTreeSet<ObjectRef>>,
+    >,
     pub(crate) active_trait_checks: std::sync::Mutex<
         std::collections::HashMap<
             std::thread::ThreadId,
@@ -157,6 +160,7 @@ impl ObjectStore {
             heap: Heap::new()?,
             function_type: None,
             field_type_checks: false,
+            active_attribute_checks: std::sync::Mutex::new(std::collections::HashMap::new()),
             active_trait_checks: std::sync::Mutex::new(std::collections::HashMap::new()),
         })
     }
@@ -312,6 +316,9 @@ impl ObjectStore {
         if self.field_type_checks {
             self.check_field_write(reference, &name, &value)?;
         }
+        for object in self.attribute_path(reference)? {
+            self.check_typed_method_write(object, &name)?;
+        }
         let storage = *self
             .attribute_path(reference)?
             .last()