core: judge: bug fix

packages/hydrooj/src/service/bus.ts

@@ -1,6 +1,6 @@
 /* eslint-disable no-await-in-loop */
-import type {
-    Db, Filter, ObjectId, OnlyFieldsOfType,
+import {
+    BSON, Db, Filter, ObjectId, OnlyFieldsOfType,
 } from 'mongodb';
 import pm2 from '@hydrooj/utils/lib/locate-pm2';
 import type { ProblemSolutionHandler } from '../handler/problem';
@@ -111,10 +111,10 @@ try {
     pm2.launchBus((err, bus) => {
         if (err) throw new Error();
         bus.on('hydro:broadcast', (packet) => {
-            (app.parallel as any)(packet.data.event, ...packet.data.payload);
+            (app.parallel as any)(packet.data.event, ...BSON.EJSON.parse(packet.data.payload));
         });
         app.on('bus/broadcast', (event, payload) => {
-            process.send({ type: 'hydro:broadcast', data: { event, payload } });
+            process.send({ type: 'hydro:broadcast', data: { event, payload: BSON.EJSON.stringify(payload) } });
         });
         console.debug('Using pm2 event bus');
     });