From 9d4e52105998e5154ab3aefe9b0ed8c5f2a20684 Mon Sep 17 00:00:00 2001
From: Maarten Sijm <9739541+mpsijm@users.noreply.github.com>
Date: Wed, 21 Feb 2024 10:21:13 +0100
Subject: [PATCH] Partially revert "[problem] In validate_data, run
 validate_format tasks in parallel"

This partially reverts commit 7d218566afb852b53f39589046f38d69b087321d.
---
 bin/problem.py | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/bin/problem.py b/bin/problem.py
index 9c66b182..c22f98b6 100644
--- a/bin/problem.py
+++ b/bin/problem.py
@@ -681,10 +681,7 @@ def validate_data(problem, mode: validate.Mode, constraints: dict | bool | None
 
         # validate the testcases
         bar = ProgressBar(action, items=[t.name for t in testcases])
-
-        def process_testcase(testcase):
-            nonlocal success
-
+        for testcase in testcases:
             bar.start(testcase.name)
 
             if (
@@ -696,13 +693,11 @@ def process_testcase(testcase):
                 t2 = problem.matches_existing_testcase(testcase)
                 if t2 is not None:
                     bar.error(f'Duplicate testcase: identical to {t2.name}')
-                    return
+                    continue
 
             success &= testcase.validate_format(mode, bar=bar, constraints=constraints)
             bar.done()
 
-        parallel.run_tasks(process_testcase, testcases)
-
         bar.finalize(print_done=True)
 
         # Make sure all constraints are satisfied.