From f7dbdc905ea93432f0894b319e44cc80360772e2 Mon Sep 17 00:00:00 2001
From: Matistjati <matistjati@outlook.com>
Date: Thu, 12 Jun 2025 18:05:49 +0200
Subject: [PATCH] Fix multithreading crash

---
 problemtools/verifyproblem.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/problemtools/verifyproblem.py b/problemtools/verifyproblem.py
index eed76615..5f76b76a 100644
--- a/problemtools/verifyproblem.py
+++ b/problemtools/verifyproblem.py
@@ -479,6 +479,9 @@ def __init__(self, problem: Problem, datadir: str | None = None, parent: TestCas
         if not parent:
             self.set_symlinks()
 
+    def start_background_work(self, context: Context) -> None:
+        pass
+
     def __str__(self) -> str:
         return f'testcase group {self.name}'