diff --git a/package.json b/package.json
index 58abc33..ea458e7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@sim-phi/extends",
-  "version": "0.3.2",
+  "version": "0.3.3",
   "description": "Third-party chart format conversion functions for sim-phi.",
   "type": "module",
   "main": "dist/index.js",
@@ -30,13 +30,13 @@
     "@babel/plugin-transform-nullish-coalescing-operator": "^7.23.4",
     "@rollup/plugin-babel": "^6.0.4",
     "@rollup/plugin-terser": "^0.4.4",
-    "@stylistic/eslint-plugin": "^1.4.1",
-    "@typescript-eslint/eslint-plugin": "^6.12.0",
-    "eslint": "^8.54.0",
+    "@stylistic/eslint-plugin": "^1.5.4",
+    "@typescript-eslint/eslint-plugin": "^6.19.0",
+    "eslint": "^8.56.0",
     "eslint-plugin-rulesdir": "^0.2.2",
-    "typescript": "^5.3.2",
-    "vite": "^5.0.2",
-    "vite-plugin-dts": "^3.6.3"
+    "typescript": "^5.3.3",
+    "vite": "^5.0.12",
+    "vite-plugin-dts": "^3.7.1"
   },
   "files": [
     "dist"
diff --git a/src/pec/rpe2json.ts b/src/pec/rpe2json.ts
index 2bc5f50..c4495ac 100644
--- a/src/pec/rpe2json.ts
+++ b/src/pec/rpe2json.ts
@@ -595,41 +595,42 @@ export function parse(pec: string, filename: string): {
         lineRPE.pushNote(type, time, positionX, holdTime, speed, note.above === 1, note.isFake !== 0, note.alpha === 0);
       }
     }
-    for (const e of i.eventLayers) {
-      if (!e) continue; // 有可能是null
+    for (const evts of i.eventLayers) {
+      if (!evts) continue; // 有可能是null
       const layer = new EventLayer1();
-      for (const j of e.moveXEvents || []) {
-        const startTime = bpmList.calc2(j.startTime);
-        const endTime = bpmList.calc2(j.endTime);
-        const { fn, code } = getEasingFn(j, startTime, endTime);
-        getWarning(code, j);
-        layer.pushMoveXEvent(startTime, endTime, j.start, j.end, fn);
+      for (const evt of evts.moveXEvents || []) {
+        const startTime = bpmList.calc2(evt.startTime);
+        const endTime = bpmList.calc2(evt.endTime);
+        const { fn, code } = getEasingFn(evt, startTime, endTime);
+        getEasingWarning(code, evt);
+        layer.pushMoveXEvent(startTime, endTime, evt.start, evt.end, fn);
       }
-      for (const j of e.moveYEvents || []) {
-        const startTime = bpmList.calc2(j.startTime);
-        const endTime = bpmList.calc2(j.endTime);
-        const { fn, code } = getEasingFn(j, startTime, endTime);
-        getWarning(code, j);
-        layer.pushMoveYEvent(startTime, endTime, j.start, j.end, fn);
+      for (const evt of evts.moveYEvents || []) {
+        const startTime = bpmList.calc2(evt.startTime);
+        const endTime = bpmList.calc2(evt.endTime);
+        const { fn, code } = getEasingFn(evt, startTime, endTime);
+        getEasingWarning(code, evt);
+        layer.pushMoveYEvent(startTime, endTime, evt.start, evt.end, fn);
       }
-      for (const j of e.rotateEvents || []) {
-        const startTime = bpmList.calc2(j.startTime);
-        const endTime = bpmList.calc2(j.endTime);
-        const { fn, code } = getEasingFn(j, startTime, endTime);
-        getWarning(code, j);
-        layer.pushRotateEvent(startTime, endTime, j.start, j.end, fn);
+      for (const evt of evts.rotateEvents || []) {
+        const startTime = bpmList.calc2(evt.startTime);
+        const endTime = bpmList.calc2(evt.endTime);
+        const { fn, code } = getEasingFn(evt, startTime, endTime);
+        getEasingWarning(code, evt);
+        layer.pushRotateEvent(startTime, endTime, evt.start, evt.end, fn);
       }
-      for (const j of e.alphaEvents || []) {
-        const startTime = bpmList.calc2(j.startTime);
-        const endTime = bpmList.calc2(j.endTime);
-        const { fn, code } = getEasingFn(j, startTime, endTime);
-        getWarning(code, j);
-        layer.pushAlphaEvent(startTime, endTime, j.start, j.end, fn);
+      for (const evt of evts.alphaEvents || []) {
+        const startTime = bpmList.calc2(evt.startTime);
+        const endTime = bpmList.calc2(evt.endTime);
+        const { fn, code } = getEasingFn(evt, startTime, endTime);
+        if (evt.start < 0 || evt.end < 0) warn(1, 'LineAlphaWarning', `检测到负数alpha(将被视为0)\n位于:"${JSON.stringify(evt)}"`);
+        getEasingWarning(code, evt);
+        layer.pushAlphaEvent(startTime, endTime, evt.start, evt.end, fn);
       }
-      for (const j of e.speedEvents || []) {
-        const startTime = bpmList.calc2(j.startTime);
-        const endTime = bpmList.calc2(j.endTime);
-        layer.pushSpeedEvent(startTime, endTime, j.start, j.end);
+      for (const evt of evts.speedEvents || []) {
+        const startTime = bpmList.calc2(evt.startTime);
+        const endTime = bpmList.calc2(evt.endTime);
+        layer.pushSpeedEvent(startTime, endTime, evt.start, evt.end);
       }
       lineRPE.eventLayers.push(layer);
     }
@@ -647,7 +648,7 @@ export function parse(pec: string, filename: string): {
     result.numOfNotes! += judgeLine.numOfNotes;
   }
   return { data: result, messages: warnings, info, line, format };
-  function getWarning(code: EasingCode, le: LineEventRPE) {
+  function getEasingWarning(code: EasingCode, le: LineEventRPE) {
     if (code === EasingCode.TypeNotSupported) warn(1, 'EasingTypeWarning', `未知的缓动类型:${le.easingType}(将被视为1)\n位于:"${JSON.stringify(le)}"`);
     if (code === EasingCode.LeftEqualsRight) warn(1, 'EasingClipWarning', `检测到easingLeft等于easingRight(将被视为线性)\n位于:"${JSON.stringify(le)}"`);
     if (code === EasingCode.ValueNotFinite) warn(1, 'EasingClipWarning', `非法的缓动函数(将被视为线性)\n位于:"${JSON.stringify(le)}"`);
diff --git a/tools/eslint-config.cjs b/tools/eslint-config.cjs
index 8572dce..f9d167e 100644
--- a/tools/eslint-config.cjs
+++ b/tools/eslint-config.cjs
@@ -25,7 +25,7 @@ module.exports = {
     '@stylistic/multiline-ternary': ['error', 'never'],
     '@stylistic/newline-per-chained-call': 'off', // qwq
     '@stylistic/no-confusing-arrow': 'off', // qwq
-    '@stylistic/no-extra-parens': ['error', 'all', { enforceForSequenceExpressions: false }],
+    '@stylistic/no-extra-parens': ['error', 'all'],
     '@stylistic/no-mixed-operators': 'off', // qwq
     '@stylistic/no-multiple-empty-lines': ['error', { max: 0 }],
     '@stylistic/object-curly-spacing': ['error', 'always'],