core: fix oi contest problem_view

packages/hydrooj/package.json

@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "3.4.22",
+    "version": "3.4.23",
     "bin": "bin/hydrooj.js",
     "main": "src/loader",
     "module": "src/loader",

packages/hydrooj/src/handler/problem.ts

@@ -294,7 +294,7 @@ export class ProblemDetailHandler extends ProblemHandler {
             if (contest.isNotStarted(this.tdoc)) throw new ContestNotLiveError(tid);
             if (!contest.isDone(this.tdoc) && !this.tsdoc?.attend) throw new ContestNotAttendedError(tid);
             this.pdoc.tag.length = 0;
-            if (!contest.canShowScoreboard(this.tdoc) || !contest.isLocked(this.tdoc)) {
+            if (!contest.canShowScoreboard.call(this, this.tdoc) || !contest.isLocked(this.tdoc)) {
                 delete this.pdoc.nAccept;
                 delete this.pdoc.nSubmit;
                 delete this.pdoc.difficulty;