judge: code wrapper for sysinfo

packages/hydrojudge/src/service.ts

@@ -232,6 +232,7 @@ async function postInit() {
             this.folder = await cacheOpen(this.source, this.data);
             if ((this.code as any).content.startsWith('@@hydro_submission_file@@')) {
                 const id = (this.code as any).content.split('@@hydro_submission_file@@')[1]?.split('#')?.[0];
+                if (!id) throw new SystemError('Submission File Not Found');
                 const target = await fetchCodeFile(id);
                 this.code = { src: target };
                 this.clean.push(() => fs.remove(target));

packages/hydrojudge/src/sysinfo.ts

@@ -14,7 +14,8 @@ async function stackSize() {
     try {
         const context: Context = {
             lang: 'cc',
-            code: `#include <iostream>
+            code: {
+                content: `#include <iostream>
 using namespace std;
 int i=1;
 int main(){
@@ -24,6 +25,7 @@ int main(){
     if (i>256) return 0;
     main();
 }`,
+            },
             config: {
                 time: '3s',
                 memory: '256m',