From eba08e936a807e0cae03c0d50160457f578b71aa Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@gmail.com>
Date: Wed, 26 Jun 2019 19:53:58 +0300
Subject: [PATCH] Only return an 8 bit result from report_errors

---
 include/boost/core/lightweight_test.hpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/include/boost/core/lightweight_test.hpp b/include/boost/core/lightweight_test.hpp
index d2b322c..0f8274d 100644
--- a/include/boost/core/lightweight_test.hpp
+++ b/include/boost/core/lightweight_test.hpp
@@ -379,6 +379,7 @@ inline int report_errors()
     result.done();
 
     int errors = result.errors();
+
     if( errors == 0 )
     {
         BOOST_LIGHTWEIGHT_TEST_OSTREAM
@@ -389,7 +390,9 @@ inline int report_errors()
         BOOST_LIGHTWEIGHT_TEST_OSTREAM
           << errors << " error" << (errors == 1? "": "s") << " detected." << std::endl;
     }
-    return errors;
+
+    // `return report_errors();` from main only supports 8 bit exit codes
+    return errors < 256? errors: 255;
 }
 
 } // namespace boost