From 3f7f2572b0dcebee03d08508e23b4c039ef5add5 Mon Sep 17 00:00:00 2001
From: Richard Hodges <hodges.r@gmail.com>
Date: Tue, 16 Aug 2022 10:26:23 +0200
Subject: [PATCH] Workaround TSAN CI bug

fix #2499
---
 CHANGELOG.md                                  |  4 ++++
 .../include/boost/beast/test/yield_to.hpp     | 22 ++++++++++++-------
 2 files changed, 18 insertions(+), 8 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index e0029d33..4841dd19 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+* Workaround TSAN CI bug.
+
+--------------------------------------------------------------------------------
+
 Version 332: 
 
 * Fix beast::zlib warnings
diff --git a/test/extras/include/boost/beast/test/yield_to.hpp b/test/extras/include/boost/beast/test/yield_to.hpp
index b6571ebd..145e889d 100644
--- a/test/extras/include/boost/beast/test/yield_to.hpp
+++ b/test/extras/include/boost/beast/test/yield_to.hpp
@@ -122,15 +122,21 @@ void
 enable_yield_to::
 spawn(F0&& f, FN&&... fn)
 {
-    asio::spawn(ioc_,
-        [&](yield_context yield)
+    // dispatch of spawn is a workaround for
+    // https://github.com/boostorg/beast/issues/2499
+    asio::dispatch(ioc_, 
+        [&]
         {
-            f(yield);
-            std::lock_guard<std::mutex> lock{m_};
-            if(--running_ == 0)
-                cv_.notify_all();
-        }
-        , boost::coroutines::attributes(2 * 1024 * 1024));
+            asio::spawn(ioc_,
+                [&](yield_context yield)
+                {
+                    f(yield);
+                    std::lock_guard<std::mutex> lock{m_};
+                    if(--running_ == 0)
+                        cv_.notify_all();
+                }
+                , boost::coroutines::attributes(2 * 1024 * 1024));
+        });
     spawn(fn...);
 }