RustPython
diff --git a/‎crates/vm/src/builtins/type.rs‎
Lines changed: 4 additions & 4 deletions b/‎crates/vm/src/builtins/type.rs‎
Lines changed: 4 additions & 4 deletions
@@ -562,12 +562,12 @@ impl PyType {
             slots.flags |= PyTypeFlags::HAS_DICT
         }
 
-        // Inherit HAS_WEAKREF from any base in MRO that has it
+        // Inherit HAS_WEAKREF/MANAGED_WEAKREF from any base in MRO that has it
         if mro
             .iter()
             .any(|b| b.slots.flags.has_feature(PyTypeFlags::HAS_WEAKREF))
         {
-            slots.flags |= PyTypeFlags::HAS_WEAKREF
+            slots.flags |= PyTypeFlags::HAS_WEAKREF | PyTypeFlags::MANAGED_WEAKREF
         }
 
         // Inherit SEQUENCE and MAPPING flags from base classes
@@ -632,7 +632,7 @@ impl PyType {
             slots.flags |= PyTypeFlags::HAS_DICT
         }
         if base.slots.flags.has_feature(PyTypeFlags::HAS_WEAKREF) {
-            slots.flags |= PyTypeFlags::HAS_WEAKREF
+            slots.flags |= PyTypeFlags::HAS_WEAKREF | PyTypeFlags::MANAGED_WEAKREF
         }
 
         // Inherit SEQUENCE and MAPPING flags from base class
@@ -1867,7 +1867,7 @@ impl Constructor for PyType {
         // 2. __weakref__ is in __slots__
         let may_add_weakref = !base.slots.flags.has_feature(PyTypeFlags::HAS_WEAKREF);
         if (heaptype_slots.is_none() && may_add_weakref) || add_weakref {
-            flags |= PyTypeFlags::HAS_WEAKREF;
+            flags |= PyTypeFlags::HAS_WEAKREF | PyTypeFlags::MANAGED_WEAKREF;
         }
 
         let (slots, heaptype_ext) = {
Original file line number	Diff line number	Diff line change
`@@ -562,12 +562,12 @@ impl PyType {`
`562`	`562`	`slots.flags \|= PyTypeFlags::HAS_DICT`
`563`	`563`	`}`
`564`	`564`
`565`		`- // Inherit HAS_WEAKREF from any base in MRO that has it`
	`565`	`+ // Inherit HAS_WEAKREF/MANAGED_WEAKREF from any base in MRO that has it`
`566`	`566`	`if mro`
`567`	`567`	`.iter()`
`568`	`568`	`.any(\|b\| b.slots.flags.has_feature(PyTypeFlags::HAS_WEAKREF))`
`569`	`569`	`{`
`570`		`- slots.flags \|= PyTypeFlags::HAS_WEAKREF`
	`570`	`+ slots.flags \|= PyTypeFlags::HAS_WEAKREF \| PyTypeFlags::MANAGED_WEAKREF`
`571`	`571`	`}`
`572`	`572`
`573`	`573`	`// Inherit SEQUENCE and MAPPING flags from base classes`
`@@ -632,7 +632,7 @@ impl PyType {`
`632`	`632`	`slots.flags \|= PyTypeFlags::HAS_DICT`
`633`	`633`	`}`
`634`	`634`	`if base.slots.flags.has_feature(PyTypeFlags::HAS_WEAKREF) {`
`635`		`- slots.flags \|= PyTypeFlags::HAS_WEAKREF`
	`635`	`+ slots.flags \|= PyTypeFlags::HAS_WEAKREF \| PyTypeFlags::MANAGED_WEAKREF`
`636`	`636`	`}`
`637`	`637`
`638`	`638`	`// Inherit SEQUENCE and MAPPING flags from base class`
`@@ -1867,7 +1867,7 @@ impl Constructor for PyType {`
`1867`	`1867`	`// 2. __weakref__ is in __slots__`
`1868`	`1868`	`let may_add_weakref = !base.slots.flags.has_feature(PyTypeFlags::HAS_WEAKREF);`
`1869`	`1869`	`if (heaptype_slots.is_none() && may_add_weakref) \|\| add_weakref {`
`1870`		`- flags \|= PyTypeFlags::HAS_WEAKREF;`
	`1870`	`+ flags \|= PyTypeFlags::HAS_WEAKREF \| PyTypeFlags::MANAGED_WEAKREF;`
`1871`	`1871`	`}`
`1872`	`1872`
`1873`	`1873`	`let (slots, heaptype_ext) = {`