fix: 修正遍历列表负数结束索引

src/main/engine/runtime.ts

@@ -409,7 +409,8 @@ async function executeContainer(
       const list = asArray(value);
       const reverse = String(node.values?.reverse ?? "") === "true" || String(node.values?.reverse ?? "") === "1";
       const start = Math.max(0, toNumber(node.values?.start_index, 0));
-      const end = node.values?.end_index === "" || node.values?.end_index == null ? list.length : toNumber(node.values?.end_index, list.length);
+      const requestedEnd = node.values?.end_index === "" || node.values?.end_index == null ? list.length : toNumber(node.values?.end_index, list.length);
+      const end = requestedEnd < 0 ? Math.max(start, list.length + requestedEnd + 1) : requestedEnd;
       const slice = (reverse ? [...list].reverse() : list).slice(start, end);
       let iterations = 0;
       for (let index = 0; index < slice.length; index += 1) {