From ba94c582308da1cae2104e988223ae657d10f6d6 Mon Sep 17 00:00:00 2001
From: Eshed Magali <esheder@gmail.com>
Date: Wed, 11 Mar 2026 18:50:58 +0200
Subject: [PATCH] Closing the stdout file descriptor when finished (#3864)

---
 openmc/executor.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/openmc/executor.py b/openmc/executor.py
index 9cd299345..75094e738 100644
--- a/openmc/executor.py
+++ b/openmc/executor.py
@@ -103,6 +103,7 @@ def _run(args, output, cwd):
         # If OpenMC is finished, break loop
         line = p.stdout.readline()
         if not line and p.poll() is not None:
+            p.stdout.close()
             break
 
         lines.append(line)