From d26f763180c081c8c10d17dee59b2b1139268220 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Ho=C5=99e=C5=88ovsk=C3=BD?=
 <martin.horenovsky@gmail.com>
Date: Sun, 30 Nov 2025 21:34:24 +0100
Subject: [PATCH] Initialize ReusableStringStream cache before user threads can
 run

The initialization itself is thread unsafe, and as such we cannot
allow it to be delayed until multiple user-spawned threads need it.
---
 src/catch2/internal/catch_run_context.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/catch2/internal/catch_run_context.cpp b/src/catch2/internal/catch_run_context.cpp
index 1ecc0644..3d72131d 100644
--- a/src/catch2/internal/catch_run_context.cpp
+++ b/src/catch2/internal/catch_run_context.cpp
@@ -210,6 +210,13 @@ namespace Catch {
     {
         getCurrentMutableContext().setResultCapture( this );
         m_reporter->testRunStarting(m_runInfo);
+
+        // TODO: HACK!
+        //       We need to make sure the underlying cache is initialized
+        //       while we are guaranteed to be running in a single thread,
+        //       because the initialization is not thread-safe.
+        ReusableStringStream rss;
+        (void)rss;
     }
 
     RunContext::~RunContext() {