From 5aee7970fbfc66c2f0f1668ea15671b43166df68 Mon Sep 17 00:00:00 2001
From: Florian Uhlig <f.uhlig@gsi.de>
Date: Tue, 10 Mar 2026 14:36:43 +0100
Subject: [PATCH] Fix FairLogger crash when used with C++23

---
 logger/Logger.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/logger/Logger.h b/logger/Logger.h
index faa5682..3548677 100644
--- a/logger/Logger.h
+++ b/logger/Logger.h
@@ -244,9 +244,10 @@ class Logger
         bgWhite        = 107
     };
 
-    static std::string startColor(Color color) { return fmt::format("\033[01;{}m", static_cast<int>(color)); }
+    static std::string startColor(Color color) { return fmt::format(fmt::runtime("\033[01;{}m"), static_cast<int>(color)); }
+
     static std::string endColor() { return "\033[0m"; }
-    static std::string ColorOut(Color c, std::string_view s) { return fmt::format("\033[01;{}m{}\033[0m", static_cast<int>(c), s); }
+    static std::string ColorOut(Color c, std::string_view s) { return fmt::format(fmt::runtime("\033[01;{}m{}\033[0m"), static_cast<int>(c), s); }
     static std::string GetColoredSeverityString(Severity severity);
 
     static void SetConsoleSeverity(const Severity severity);