Method try_call_finalizer

crates/vm/src/object/core.rs:1696–1713

Call __del__ if present, without triggering object deallocation. Used by GC to call finalizers before breaking cycles. This allows proper resurrection detection. PyObject_CallFinalizerFromDealloc

(&self)

    /// This allows proper resurrection detection.
    /// PyObject_CallFinalizerFromDealloc
    pub fn try_call_finalizer(&self) {
        let del = self.class().slots.del.load();
        if let Some(slot_del) = del
            && !self.gc_finalized()
        {
            // Mark as finalized BEFORE calling __del__ to prevent double-call
            // This ensures drop_slow_inner() won't call __del__ again
            self.set_gc_finalized();
            let result = crate::vm::thread::with_vm(self, |vm| {
                if let Err(e) = slot_del(self, vm)
                    && let Some(del_method) = self.get_class_attr(identifier!(vm, __del__))
                {
                    vm.run_unraisable(e, None, del_method);
                }
            });
            let _ = result;
        }
    }

    /// Clear weakrefs but collect callbacks instead of calling them.
    /// This is used by GC to ensure ALL weakrefs are cleared BEFORE any callbacks run.