judge: fix testlib exitcode

packages/hydrojudge/package.json

@@ -1,7 +1,7 @@
 {
     "name": "@hydrooj/hydrojudge",
     "bin": "bin/hydrojudge.js",
-    "version": "3.1.10",
+    "version": "3.1.11",
     "main": "package.json",
     "author": "undefined <i@undefined.moe>",
     "repository": "https://github.com/hydro-dev/Hydro.git",

packages/hydrojudge/src/checkers.ts

@@ -210,7 +210,7 @@ const checkers: Record<string, Checker> = new Proxy({
                 message: stderr,
             };
         }
-        if (status === STATUS.STATUS_RUNTIME_ERROR) {
+        if (status === STATUS.STATUS_RUNTIME_ERROR && !stderr?.trim()) {
             return {
                 status: STATUS.STATUS_WRONG_ANSWER,
                 score: 0,