From 22c2769b16c8ad80877379e481c1feb7b5dab114 Mon Sep 17 00:00:00 2001
From: Jonas Hahnfeld <jonas.hahnfeld@cern.ch>
Date: Wed, 10 Jun 2026 10:59:22 +0200
Subject: [PATCH] [hist] Initialize std::atomic in test

Before LWG 2334, in implementations only fixed in C++20 and later,
the value would be uninitialized.
---
 hist/histv7/test/hist_test.hxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hist/histv7/test/hist_test.hxx b/hist/histv7/test/hist_test.hxx
index bec8784885387..cb45e3330f09f 100644
--- a/hist/histv7/test/hist_test.hxx
+++ b/hist/histv7/test/hist_test.hxx
@@ -48,7 +48,7 @@ using ROOT::Experimental::Internal::RSliceBinIndexMapper;
 template <typename Work>
 void StressInParallel(std::size_t nThreads, Work &&w)
 {
-   std::atomic<bool> flag;
+   std::atomic<bool> flag = false;
 
    std::vector<std::thread> threads;
    for (std::size_t i = 0; i < nThreads; i++) {