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fix: Array @@species 绑定并暴露真 [[Construct]]，隐式返回交付当前 this

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彭俊皓
2026-09-20 13:07:38 +00:00
parent 28ccbebd52
commit 1a6feadac4
9 changed files with 335 additions and 70 deletions
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crates/oxide_vm/src/vm_dispatch_ctrl.rs
+12 -2
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@@ -741,16 +741,26 @@ impl Vm {
let is_derived_constructor = frame.is_derived_constructor;
let super_called = frame.super_called;
let continuation = frame.continuation;
// 隐式返回交付当前 this 绑定：super() 已把 regs[254] 换为父构造器新建
// 的实例，restore_frame 会把压帧期旧值回写 regs[254]，须先取。
let current_this = self.regs[254];
vm_trace!("RETURN frame: continuation={:?}, derived={}", continuation, is_derived_constructor);
self.restore_frame(frame);
if let (Some(target_reg), Some(constructed_this)) = (construct_result_reg, constructed_this) {
// 规范 §9.2.2.2：derived 构造器返回非对象值（含 undefined/null/原始值）
// 且未调用 super() 时抛 ReferenceError；调过 super() 则回退构造 this。
// 且未调用 super() 时抛 ReferenceError；调过 super() 则回退当前 this
// （super 已将其换为父构造器实例，构造 this 仅作非对象兜底）。
if is_derived_constructor && !result.is_object() && !super_called {
self.raise_error_kind("ReferenceError", "derived constructor must call super()")?;
return Ok(None);
}
self.regs[target_reg as usize] = if result.is_object() { result } else { constructed_this };
self.regs[target_reg as usize] = if result.is_object() {
result
} else if current_this.is_object() {
current_this
} else {
constructed_this
};
self.regs[0] = self.regs[target_reg as usize];
vm_trace!("RETURN constructor: target_reg={} regs[0]={:?}", target_reg, self.regs[0]);
} else {