fix: 闭包链式捕获越界改编译错误早暴露防静默错值

2026-10-24 02:31:13 +08:00 · 2026-08-16 12:34:14 +08:00
parent 1229924af6
commit 926d907965
1 changed files with 12 additions and 1 deletions
@@ -153,7 +153,18 @@ impl Vm {
                let mut upvals = Box::new(Vec::with_capacity(upvalue_captures.len()));
                for capture in &upvalue_captures {
                    let cell_ptr = if let Some(puv) = capture.parent_uv_idx {
-                        parent_upvalues.get(puv as usize).copied().unwrap_or(std::ptr::null_mut())
+                        match parent_upvalues.get(puv as usize) {
+                            Some(&ptr) => ptr,
+                            // parent_uv_idx 由编译期按父 upvalue 表位置计算，越界即
+                            // 捕获编码错位——Err 早暴露，避免落惰性路径读到错层 cell。
+                            None => {
+                                return Err(format!(
+                                    "CREATE_CLOSURE: parent upvalue index {} out of bounds (parent has {})",
+                                    puv,
+                                    parent_upvalues.len()
+                                ));
+                            }
+                        }
                    } else {
                        let cell_idx = capture.cell_idx as usize;
                        if cell_idx >= current_cells.len() {