From 9e81c2deaf9d8f8b6f184ed0f72ec72c359722fe Mon Sep 17 00:00:00 2001
From: Yannick Jadoul <yannick.jadoul@belgacom.net>
Date: Wed, 18 Nov 2020 22:10:57 +0100
Subject: [PATCH] Debug MSVC failure; cat xatomic.h

---
 .github/workflows/ci.yml | 2 ++
 tests/test_iostream.cpp  | 4 ++--
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 73424f92da3..8c86596e047 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -598,6 +598,8 @@ jobs:
       with:
         python-version: ${{ matrix.python }}
 
+    - run: cat "c:\program files (x86)\microsoft visual studio 14.0\vc\include\xatomic.h"
+
     - name: Update CMake
       uses: jwlawson/actions-setup-cmake@v1.4
 
diff --git a/tests/test_iostream.cpp b/tests/test_iostream.cpp
index f76f30588d6..957210654f3 100644
--- a/tests/test_iostream.cpp
+++ b/tests/test_iostream.cpp
@@ -31,7 +31,7 @@ void noisy_funct_dual(std::string msg, std::string emsg) {
 // simply repeatedly write to std::cerr until stopped
 // redirect is called at some point to test the safety of scoped_estream_redirect
 struct TestThread {
-    TestThread() : t_{nullptr}, stop_{false} {
+    TestThread() : t_{nullptr}, stop_{0} {
         auto thread_f = [this] {
             while (!stop_) {
                 std::cout << "x" << std::flush;
@@ -57,7 +57,7 @@ struct TestThread {
     }
 
     std::thread * t_;
-    std::atomic<bool> stop_;
+    std::atomic<int> stop_;  // VS 2015's MSVC doesn't like `std::atomic<bool>`: ...\xatomic.h(382): warning C4702: unreachable code
 };