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fix: 修复块级闭包 TDZ 占位与调用窗口踩踏及 for-of 迭代器展开
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@@ -303,8 +303,16 @@ impl Vm {
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// 窗口 = min(调用方活动寄存器, 存活上界);call_window=0 表示调用方全量
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// (运行时发起路径 / 未编码的旧模块)。恢复按窗口回拷,active_reg_limit
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// 仍还原为调用方真实值(caller_active_reg_limit)。
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// native 调用在飞(native_call_depth > 0)时窗口扩到全量 254:native 实参
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// 暂存在调用点参数窗口(物理槽 252/253 一带),内层字节码调用复用同一
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// 参数窗口会踩掉外层 native 实参;窗口截断不覆盖参数窗口时 restore
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// 不还原,外层 builtin 后续读实参得踩值。
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let caller_active_reg_limit = self.active_reg_limit.max(1);
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let caller_reg_limit = self.call_window_limit(caller_active_reg_limit, call_window);
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let caller_reg_limit = if self.native_call_depth > 0 {
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254
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} else {
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self.call_window_limit(caller_active_reg_limit, call_window)
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};
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let saved_reg_offset = self.save_stack.len() as u32;
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self.save_stack.extend_from_slice(&self.regs[..caller_reg_limit as usize]);
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let saved_this = self.regs[254];
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