diff --git a/crates/oxide_vm/src/async_func.rs b/crates/oxide_vm/src/async_func.rs
index 5ba0b3b1..4077ef60 100644
--- a/crates/oxide_vm/src/async_func.rs
+++ b/crates/oxide_vm/src/async_func.rs
@@ -703,7 +703,7 @@ fn async_state_mut(obj: &JsObject) -> Option<&mut AsyncState> {
 }
 
 /// 异步挂起帧是否持有 for-in 迭代器：执行期收集门控按指针扫描
-/// （ForInIter body 分配于 epoch arena，换新 Bump 即时失效在表迭代器）。
+/// （迭代器体是堆上 Box，门控是保守门）。
 pub(crate) fn async_holds_suspended_for_in(obj: &JsObject) -> bool {
     let Some(state) = async_state_mut(obj) else {
         return false;
diff --git a/crates/oxide_vm/src/async_generator.rs b/crates/oxide_vm/src/async_generator.rs
index 62ce5ce7..cd4c5d0a 100644
--- a/crates/oxide_vm/src/async_generator.rs
+++ b/crates/oxide_vm/src/async_generator.rs
@@ -1677,7 +1677,7 @@ fn async_gen_state_mut(obj: &JsObject) -> Option<&mut AsyncGeneratorState> {
 }
 
 /// 异步生成器挂起帧是否持有 for-in 迭代器：执行期收集门控按指针扫描
-/// （ForInIter body 分配于 epoch arena，换新 Bump 即时失效在表迭代器）。
+/// （迭代器体是堆上 Box，门控是保守门）。
 pub(crate) fn async_generator_holds_suspended_for_in(obj: &JsObject) -> bool {
     let Some(state) = async_gen_state_mut(obj) else {
         return false;
diff --git a/crates/oxide_vm/src/generator.rs b/crates/oxide_vm/src/generator.rs
index 5062b3ef..36eee0be 100644
--- a/crates/oxide_vm/src/generator.rs
+++ b/crates/oxide_vm/src/generator.rs
@@ -965,7 +965,7 @@ fn generator_state_mut(obj: &JsObject) -> Option<&mut GeneratorState> {
 }
 
 /// 生成器挂起帧是否持有 for-in 迭代器：执行期收集门控按指针扫描
-/// （ForInIter body 分配于 epoch arena，换新 Bump 即时失效在表迭代器）。
+/// （迭代器体是堆上 Box，门控是保守门）。
 pub(crate) fn generator_holds_suspended_for_in(obj: &JsObject) -> bool {
     let Some(state) = generator_state_mut(obj) else {
         return false;
diff --git a/crates/oxide_vm/src/session_gc.rs b/crates/oxide_vm/src/session_gc.rs
index 81fec05b..c51c87cd 100644
--- a/crates/oxide_vm/src/session_gc.rs
+++ b/crates/oxide_vm/src/session_gc.rs
@@ -1040,8 +1040,8 @@ impl SessionGc {
     ///   identity 不分裂。
     ///
     /// # 边界与前提
-    /// - 调用方已完成门控（无活跃/挂起 for-in）：ForInIter body 分配于 epoch
-    ///   arena，换新 Bump 即时失效在表迭代器；
+    /// - 调用方已完成门控（无活跃/挂起 for-in）：门控是保守门，迭代器体
+    ///   是堆上 Box，收集不搬移迭代器体；
     /// - 调用点为 dispatch 安全点（`native_call_depth == 0`），无在途 builtin
     ///   局部裸指针、dispatch 未重入。
     ///
diff --git a/crates/oxide_vm/src/session_gc/tests.rs b/crates/oxide_vm/src/session_gc/tests.rs
index 576870c5..8154479e 100644
--- a/crates/oxide_vm/src/session_gc/tests.rs
+++ b/crates/oxide_vm/src/session_gc/tests.rs
@@ -1730,18 +1730,18 @@ fn in_run_collection_reclaims_dead_and_keeps_live() {
 
 /// for-in 门控双形钉住：活跃形（迭代器在 `vm.iters` 表内）与挂起形
 /// （生成器在 for-in 内 yield，迭代器搬入状态盒）都须拦下执行期收集——
-/// 换新 Bump 使 ForInIter body 即时失效；门控开后方可收集。
+/// 门控是保守门，迭代器体为堆上 Box；门控开后方可收集。
 #[test]
 fn active_and_suspended_for_in_block_in_run_collection() {
     // 活跃形：迭代器直接压在 vm.iters，O(1) 子句即拦。
     let mut vm = vm_with_threshold(65536);
     let dead = plain_object(&mut vm);
     vm.gc_state.epoch_object_ptrs.push(dead);
-    let iter = vm.epoch.alloc(crate::vm::ForInIter {
-        keys: bumpalo::collections::Vec::new_in(vm.epoch.bump()),
+    let iter = Box::into_raw(Box::new(crate::vm::ForInIter {
+        keys: Vec::new(),
         index: 0,
-    });
-    vm.iters.push_for_in(iter.cast::<crate::vm::ForInIter<'static>>());
+    }));
+    vm.iters.push_for_in(iter);
     let bump_before = vm.epoch.current_id();
 
     vm.maybe_collect_in_run();
@@ -1750,7 +1750,7 @@ fn active_and_suspended_for_in_block_in_run_collection() {
     assert!(vm.gc_state.epoch_object_ptrs.contains(&dead), "死对象仍在 epoch 表");
 
     // 迭代器出表后同一调用点即应收集。
-    vm.iters.for_in_iters.pop();
+    vm.iters.pop_for_in();
     vm.maybe_collect_in_run();
     assert_eq!(vm.session_gc_stats().total_collections, 1, "门控开：应收集");
     assert!(vm.epoch.current_id() > bump_before, "收集应换新 epoch Bump");
diff --git a/crates/oxide_vm/src/suspended.rs b/crates/oxide_vm/src/suspended.rs
index ccc6805b..f52b6c92 100644
--- a/crates/oxide_vm/src/suspended.rs
+++ b/crates/oxide_vm/src/suspended.rs
@@ -30,7 +30,7 @@ pub(crate) struct SuspendedFrame {
     pub save_stack: Vec<JsValue>,
     pub cell_stack: Vec<Vec<*mut Cell>>,
     pub try_stack: Vec<TryHandler>,
-    pub for_in_iters: Vec<*mut ForInIter<'static>>,
+    pub for_in_iters: Vec<*mut ForInIter>,
     pub for_of_iters: Vec<ForOfEntry>,
     /// `yield*` 委托中的内层迭代器；异步函数恒为 None。
     pub delegated_iterator: Option<JsValue>,
@@ -235,7 +235,7 @@ impl SuspendedFrame {
             if iter.is_null() {
                 continue;
             }
-            // SAFETY: for_in_iters 存放由当前 VM epoch 拥有的存活迭代器指针。
+            // SAFETY: for_in_iters 存放堆上迭代器体，状态盒独占持有。
             for (v, _si) in unsafe { (*(*iter)).keys.iter() } {
                 f(*v);
             }
@@ -316,7 +316,7 @@ impl SuspendedFrame {
             if iter.is_null() {
                 continue;
             }
-            // SAFETY: for_in_iters 存放由当前 VM epoch 拥有的存活迭代器指针。
+            // SAFETY: for_in_iters 存放堆上迭代器体，状态盒独占持有。
             for (v, _si) in unsafe { (*(*iter)).keys.iter_mut() } {
                 *v = rewrite(*v);
             }
@@ -362,7 +362,18 @@ impl SuspendedFrame {
             save_stack: self.save_stack.iter().copied().map(&mut rewrite).collect(),
             cell_stack: self.cell_stack.clone(),
             try_stack: self.try_stack.clone(),
-            for_in_iters: self.for_in_iters.clone(),
+            for_in_iters: self.for_in_iters.iter().map(|&iter| {
+                if iter.is_null() {
+                    return iter;
+                }
+                // SAFETY: 指针是堆上迭代器体，原件状态盒独占持有；克隆新建
+                // 独立体，原件与克隆各持自有体，恰好各释放一次。
+                let body = unsafe { &*iter };
+                Box::into_raw(Box::new(ForInIter {
+                    keys: body.keys.iter().map(|(v, si)| (rewrite(*v), *si)).collect(),
+                    index: body.index,
+                }))
+            }).collect(),
             for_of_iters: self
                 .for_of_iters
                 .iter()
@@ -425,6 +436,23 @@ impl SuspendedFrame {
     }
 }
 
+impl Drop for SuspendedFrame {
+    /// 释放状态盒持有的 for-in 迭代器体：体是堆上 `Box`，每个状态盒独占
+    /// 持有自身体，随状态盒释放逐条释放（null 跳过）。restore 已把向量
+    /// 移出时字段为空，Drop 不再触碰，无双放。
+    fn drop(&mut self) {
+        for iter in self.for_in_iters.drain(..) {
+            if iter.is_null() {
+                continue;
+            }
+            // SAFETY: 指针是堆上迭代器体，状态盒独占持有，释放恰好一次。
+            unsafe {
+                drop(Box::from_raw(iter));
+            }
+        }
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
diff --git a/crates/oxide_vm/src/vm/frames.rs b/crates/oxide_vm/src/vm/frames.rs
index 11258fd7..4521edec 100644
--- a/crates/oxide_vm/src/vm/frames.rs
+++ b/crates/oxide_vm/src/vm/frames.rs
@@ -87,11 +87,13 @@ pub struct CallFrame {
 
 /// 一次 `for-in` 迭代的游标：已收集的 key 列表与当前下标。
 ///
+/// 体是堆上 `Box`：迭代器表与挂起状态盒各独占持有体，出表/状态盒释放时
+/// 逐条释放。
 /// 每个 key 与它的 intern id 配对保存，使整型下标 key 无需重新 intern 即可排到字符串 key 之前。
-pub struct ForInIter<'bump> {
+pub struct ForInIter {
     /// 每个 key 与其字符串 intern id 配对，使 for-in 排序时整型下标 key 无需
     /// 重新 intern 即可排到字符串 key 之前。
-    pub keys: bumpalo::collections::Vec<'bump, (JsValue, u32)>,
+    pub keys: Vec<(JsValue, u32)>,
     pub index: usize,
 }
 
diff --git a/crates/oxide_vm/src/vm/gc_hooks.rs b/crates/oxide_vm/src/vm/gc_hooks.rs
index d1232e69..786eca48 100644
--- a/crates/oxide_vm/src/vm/gc_hooks.rs
+++ b/crates/oxide_vm/src/vm/gc_hooks.rs
@@ -96,7 +96,7 @@ impl Vm {
             if iter.is_null() {
                 continue;
             }
-            // SAFETY: for_in_iters 存放由当前 VM epoch 拥有的存活迭代器指针。
+            // SAFETY: for_in_iters 存放堆上迭代器体，VM 表独占持有。
             unsafe {
                 for (v, _si) in (*(*iter)).keys.iter() {
                     f(*v);
@@ -200,7 +200,7 @@ impl Vm {
             if iter.is_null() {
                 continue;
             }
-            // SAFETY: for_in_iters 存放由当前 VM epoch 拥有的存活迭代器指针。
+            // SAFETY: for_in_iters 存放堆上迭代器体，VM 表独占持有。
             unsafe {
                 for (v, _si) in (*(*iter)).keys.iter_mut() {
                     *v = rewrite(*v);
@@ -242,13 +242,13 @@ impl Vm {
     /// 门控子句二：三型状态盒（生成器/异步函数/异步生成器）的
     /// `suspended.for_in_iters` 是否非空。
     ///
-    /// ForInIter body 分配于 epoch arena，收集换新 Bump 即时失效在表迭代器；
+    /// 门控是保守门：for-in 迭代器活跃/挂起期间拦下执行期收集；
     /// 挂起帧把迭代器搬入状态盒（`vm.iters` 不可见），故须逐状态盒扫描。
     ///
     /// # 边界与前提
     /// - 扫描 epoch + session 两份对象表——挂起状态盒宿主对象可能尚未晋升；
-    /// - 挂起帧的 keys 经状态盒边收为 GC 根（被枚举对象不误释放），悬的是
-    ///   迭代器 body，故按指针扫 `for_in_iters`；
+    /// - 挂起帧的 keys 经状态盒边收为 GC 根（被枚举对象不误释放），迭代器
+    ///   体是堆上 Box，故按指针扫 `for_in_iters`；
     /// - 保守口径：死对象的状态盒同样计入（持挂起 for-in 的 run 放弃执行期
     ///   收集），正确性优先于收益；
     /// - 新增挂起态持有者须在此登记。
diff --git a/crates/oxide_vm/src/vm/inline.rs b/crates/oxide_vm/src/vm/inline.rs
index 5c22c58a..c60d2dbb 100644
--- a/crates/oxide_vm/src/vm/inline.rs
+++ b/crates/oxide_vm/src/vm/inline.rs
@@ -32,7 +32,7 @@ pub(crate) struct InlineSyncState {
     pub(crate) pending_exception: Option<JsValue>,
     pub(crate) pending_error_kind: Option<&'static str>,
     pub(crate) pending_completion: Option<Completion>,
-    pub(crate) for_in_iters: Vec<*mut ForInIter<'static>>,
+    pub(crate) for_in_iters: Vec<*mut ForInIter>,
     pub(crate) for_of_iters: Vec<ForOfEntry>,
     pub(crate) saved_bytecode_stack: Vec<Arc<[opcode::Instr]>>,
     pub(crate) saved_immutables_stack: Vec<*const [JsValue]>,
@@ -62,3 +62,20 @@ pub(crate) struct InlineSyncState {
     pub(crate) active_flat_id: u32,
     pub(crate) active_table_gen: u32,
 }
+
+impl Drop for InlineSyncState {
+    /// 释放快照持有的 for-in 迭代器体：体是堆上 `Box`，快照独占持有自身体，
+    /// drop 时逐条释放（null 跳过）。restore 是字段直移，移出后字段为空，
+    /// Drop 不再触碰，无双放。
+    fn drop(&mut self) {
+        for iter in self.for_in_iters.drain(..) {
+            if iter.is_null() {
+                continue;
+            }
+            // SAFETY: 指针是堆上迭代器体，快照独占持有，释放恰好一次。
+            unsafe {
+                drop(Box::from_raw(iter));
+            }
+        }
+    }
+}
diff --git a/crates/oxide_vm/src/vm_dispatch_misc.rs b/crates/oxide_vm/src/vm_dispatch_misc.rs
index 0b296f02..4452b94e 100644
--- a/crates/oxide_vm/src/vm_dispatch_misc.rs
+++ b/crates/oxide_vm/src/vm_dispatch_misc.rs
@@ -464,10 +464,8 @@ impl Vm {
         let mut obj_val = self.regs[a];
         if obj_val.is_null() || obj_val.is_undefined() {
             // null/undefined 枚举不到任何键——是空 for-in，而非 TypeError。
-            let keys_vec: bumpalo::collections::Vec<(JsValue, u32)> =
-                bumpalo::collections::Vec::new_in(self.epoch.bump());
-            let iter = self.epoch.alloc(ForInIter { keys: keys_vec, index: 0 });
-            self.iters.push_for_in(iter.cast::<ForInIter<'static>>());
+            let iter = Box::into_raw(Box::new(ForInIter { keys: Vec::new(), index: 0 }));
+            self.iters.push_for_in(iter);
             return Ok(());
         }
         if !obj_val.is_object() {
@@ -595,12 +593,10 @@ impl Vm {
             }
         });
 
-        // std Vec 建完后迁入 bump 区，避免枚举循环期间对 self 的 &mut 借用
-        // 与 bump 借用冲突。
-        let keys_bump: bumpalo::collections::Vec<(JsValue, u32)> =
-            bumpalo::collections::Vec::from_iter_in(keys_vec, self.epoch.bump());
-        let iter = self.epoch.alloc(ForInIter { keys: keys_bump, index: 0 });
-        self.iters.push_for_in(iter.cast::<ForInIter<'static>>());
+        // std Vec 直接作为迭代器体；体是堆上 Box，生命周期随迭代器表与
+        // 挂起状态盒，出表/状态盒释放时逐条释放。
+        let iter = Box::into_raw(Box::new(ForInIter { keys: keys_vec, index: 0 }));
+        self.iters.push_for_in(iter);
         Ok(())
     }
 
diff --git a/crates/oxide_vm/src/vm_runtime.rs b/crates/oxide_vm/src/vm_runtime.rs
index 89afa104..671aa8d0 100644
--- a/crates/oxide_vm/src/vm_runtime.rs
+++ b/crates/oxide_vm/src/vm_runtime.rs
@@ -146,7 +146,7 @@ macro_rules! inline_save_field {
 macro_rules! inline_restore_field {
     ($recv:ident, $saved:ident, regs, boxed_window) => {
         $recv.regs[..$saved.regs.len()].copy_from_slice(&$saved.regs);
-        $recv.inline_reg_pool = Some($saved.regs.into_vec());
+        $recv.inline_reg_pool = Some(std::mem::take(&mut $saved.regs).into_vec());
     };
     ($recv:ident, $saved:ident, saved_this, copy) => {
         $recv.regs[254] = $saved.saved_this
@@ -158,7 +158,7 @@ macro_rules! inline_restore_field {
         $recv.pc = $saved.pc
     };
     ($recv:ident, $saved:ident, bytecode, move_field) => {
-        $recv.bytecode = $saved.bytecode
+        $recv.bytecode = std::mem::take(&mut $saved.bytecode)
     };
     ($recv:ident, $saved:ident, active_immutables, copy) => {
         $recv.active_immutables = $saved.active_immutables
@@ -170,10 +170,10 @@ macro_rules! inline_restore_field {
         $recv.root_reg_limit = $saved.root_reg_limit
     };
     ($recv:ident, $saved:ident, try_stack, move_field) => {
-        $recv.try_stack = $saved.try_stack
+        $recv.try_stack = std::mem::take(&mut $saved.try_stack)
     };
     ($recv:ident, $saved:ident, frames, frames_values) => {
-        $recv.frames = $saved.frames
+        $recv.frames = std::mem::take(&mut $saved.frames)
     };
     ($recv:ident, $saved:ident, exception_value, opt_take) => {
         $recv.exception_value = $saved.exception_value
@@ -188,25 +188,25 @@ macro_rules! inline_restore_field {
         $recv.pending_completion = $saved.pending_completion
     };
     ($recv:ident, $saved:ident, for_in_iters, for_in_keys) => {
-        $recv.iters.for_in_iters = $saved.for_in_iters
+        $recv.iters.for_in_iters = std::mem::take(&mut $saved.for_in_iters)
     };
     ($recv:ident, $saved:ident, for_of_iters, iter_take) => {
-        $recv.iters.for_of_iters = $saved.for_of_iters
+        $recv.iters.for_of_iters = std::mem::take(&mut $saved.for_of_iters)
     };
     ($recv:ident, $saved:ident, saved_bytecode_stack, move_field) => {
-        $recv.saved_bytecode_stack = $saved.saved_bytecode_stack
+        $recv.saved_bytecode_stack = std::mem::take(&mut $saved.saved_bytecode_stack)
     };
     ($recv:ident, $saved:ident, saved_immutables_stack, move_field) => {
-        $recv.saved_immutables_stack = $saved.saved_immutables_stack
+        $recv.saved_immutables_stack = std::mem::take(&mut $saved.saved_immutables_stack)
     };
     ($recv:ident, $saved:ident, save_stack, move_field) => {
-        $recv.save_stack = $saved.save_stack
+        $recv.save_stack = std::mem::take(&mut $saved.save_stack)
     };
     ($recv:ident, $saved:ident, spill_stack, move_field) => {
-        $recv.spill_stack = $saved.spill_stack
+        $recv.spill_stack = std::mem::take(&mut $saved.spill_stack)
     };
     ($recv:ident, $saved:ident, cell_stack, move_field) => {
-        $recv.cell_stack = $saved.cell_stack
+        $recv.cell_stack = std::mem::take(&mut $saved.cell_stack)
     };
     ($recv:ident, $saved:ident, inline_callee, opt_copy) => {
         $recv.inline_callee = $saved.inline_callee
@@ -336,7 +336,7 @@ impl Vm {
 
     /// 把 [`save_inline_state`] 保存的状态恢复回 VM。窗口回拷 + `regs[254]/[255]`
     /// 单回，窗口外寄存器 callee 未触碰无需恢复。
-    pub(crate) fn restore_inline_state(&mut self, saved: Box<InlineSyncState>) {
+    pub(crate) fn restore_inline_state(&mut self, mut saved: Box<InlineSyncState>) {
         vm_trace!("restore_inline_state: pc={}", saved.pc);
         // 固化不变量：内联 state-swap 边界不携带在途异步逃出（与 save 侧同）。
         debug_assert!(self.pending_async_escape.is_none());
@@ -363,8 +363,7 @@ impl Vm {
         self.active_reg_limit = 1;
         self.root_reg_limit = 1;
         self.try_stack.clear();
-        self.iters.for_in_iters.clear();
-        self.iters.for_of_iters.clear();
+        self.iters.reset();
         self.spill_stack.clear();
         self.save_stack.clear();
         self.saved_bytecode_stack.clear();
diff --git a/crates/oxide_vm/src/vm_state.rs b/crates/oxide_vm/src/vm_state.rs
index 1cf73320..1244f93d 100644
--- a/crates/oxide_vm/src/vm_state.rs
+++ b/crates/oxide_vm/src/vm_state.rs
@@ -175,25 +175,41 @@ pub(crate) struct ForOfEntry {
 
 /// for-in / for-of 的活跃迭代器状态。
 pub(crate) struct IterState {
-    pub(crate) for_in_iters: Vec<*mut ForInIter<'static>>,
+    pub(crate) for_in_iters: Vec<*mut ForInIter>,
     pub(crate) for_of_iters: Vec<ForOfEntry>,
 }
 
 impl IterState {
     pub(crate) fn reset(&mut self) {
-        self.for_in_iters.clear();
+        for iter in self.for_in_iters.drain(..) {
+            if iter.is_null() {
+                continue;
+            }
+            // SAFETY: 指针是堆上迭代器体，表独占持有，清表释放恰好一次。
+            unsafe {
+                drop(Box::from_raw(iter));
+            }
+        }
         self.for_of_iters.clear();
     }
 
-    pub(crate) fn push_for_in(&mut self, iter: *mut ForInIter<'static>) {
+    pub(crate) fn push_for_in(&mut self, iter: *mut ForInIter) {
         self.for_in_iters.push(iter);
     }
 
     pub(crate) fn pop_for_in(&mut self) {
-        self.for_in_iters.pop();
+        if let Some(iter) = self.for_in_iters.pop() {
+            if iter.is_null() {
+                return;
+            }
+            // SAFETY: 指针是堆上迭代器体，表独占持有，出表释放恰好一次。
+            unsafe {
+                drop(Box::from_raw(iter));
+            }
+        }
     }
 
-    pub(crate) fn last_for_in(&self) -> *mut ForInIter<'static> {
+    pub(crate) fn last_for_in(&self) -> *mut ForInIter {
         self.for_in_iters.last().copied().unwrap_or(std::ptr::null_mut())
     }
 
diff --git a/crates/oxide_vm/src/vm_support.rs b/crates/oxide_vm/src/vm_support.rs
index aa96f95e..1089269a 100644
--- a/crates/oxide_vm/src/vm_support.rs
+++ b/crates/oxide_vm/src/vm_support.rs
@@ -428,6 +428,9 @@ impl Vm {
     /// 重置，本函数只释放手工管理的 Box 指针（属性向量、各原生盒、串、BigInt、cell）。
     /// 原生盒在 GC 搬移/晋升时已深拷贝为单所有权，此处恰好释放一次。
     pub(crate) fn teardown_session_heap_data(&mut self) {
+        // 迭代器体是堆上 Box：收尾路径（full_reset 与 Drop 共用）逐条释放，
+        // 防 Vm 直接 drop 时表内残留体泄漏。
+        self.iters.reset();
         // upvalue 列表先于对象表清空释放：去重枚举依赖两份对象表尚存。
         self.free_session_upvalues();
         self.free_epoch_object_heap_data();
diff --git a/crates/oxide_vm/src/vm_support/tests.rs b/crates/oxide_vm/src/vm_support/tests.rs
index cc4b7df9..de0cc9b7 100644
--- a/crates/oxide_vm/src/vm_support/tests.rs
+++ b/crates/oxide_vm/src/vm_support/tests.rs
@@ -847,9 +847,10 @@ fn reset_clears_runtime_state_like_rerun() {
         upvalues: std::ptr::slice_from_raw_parts(std::ptr::null(), 0),
     });
     vm.save_stack.push(JsValue::undefined());
-    vm.iters
-        .for_in_iters
-        .push(std::ptr::dangling_mut::<crate::vm::ForInIter<'static>>());
+    vm.iters.for_in_iters.push(Box::into_raw(Box::new(crate::vm::ForInIter {
+        keys: Vec::new(),
+        index: 0,
+    })));
     vm.iters.for_of_iters.push(crate::vm_state::ForOfEntry {
         iterator: JsValue::undefined(),
         last_result: JsValue::undefined(),