Method clear

crates/vm/src/builtins/frame.rs:672–708

= frame_clear_impl

(&self, vm: &VirtualMachine)

    #[pymethod]
    // = frame_clear_impl
    fn clear(&self, vm: &VirtualMachine) -> PyResult<()> {
        let owner = FrameOwner::from_i8(self.owner.load(core::sync::atomic::Ordering::Acquire));
        match owner {
            FrameOwner::Generator => {
                // Generator frame: check if suspended (lasti > 0 means
                // FRAME_SUSPENDED). lasti == 0 means FRAME_CREATED and
                // can be cleared.
                if self.lasti() != 0 {
                    return Err(vm.new_runtime_error("cannot clear a suspended frame"));
                }
            }
            FrameOwner::Thread => {
                // Thread-owned frame: always executing, cannot clear.
                return Err(vm.new_runtime_error("cannot clear an executing frame"));
            }
            FrameOwner::FrameObject => {
                // Detached frame: safe to clear.
            }
        }

        // Clear fastlocals
        // SAFETY: Frame is not executing (detached or stopped).
        {
            let fastlocals = unsafe { self.fastlocals_mut() };
            for slot in fastlocals.iter_mut() {
                *slot = None;
            }
        }

        // Clear the evaluation stack and cell references
        self.clear_stack_and_cells();

        // Clear temporary refs
        self.temporary_refs.lock().clear();

        Ok(())
    }

    #[pygetset]
    fn f_generator(&self) -> Option<PyObjectRef> {