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diff --git a/src/boost/libs/outcome/test/tests/issue0210.cpp b/src/boost/libs/outcome/test/tests/issue0210.cpp
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+/* Unit testing for outcomes
+(C) 2013-2020 Niall Douglas <http://www.nedproductions.biz/> (1 commit)
+
+
+Boost Software License - Version 1.0 - August 17th, 2003
+
+Permission is hereby granted, free of charge, to any person or organization
+obtaining a copy of the software and accompanying documentation covered by
+this license (the "Software") to use, reproduce, display, distribute,
+execute, and transmit the Software, and to prepare derivative works of the
+Software, and to permit third-parties to whom the Software is furnished to
+do so, all subject to the following:
+
+The copyright notices in the Software and this entire statement, including
+the above license grant, this restriction and the following disclaimer,
+must be included in all copies of the Software, in whole or in part, and
+all derivative works of the Software, unless such copies or derivative
+works are solely in the form of machine-executable object code generated by
+a source language processor.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
+SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
+FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
+*/
+
+#include <boost/outcome/outcome.hpp>
+#include <boost/outcome/try.hpp>
+#include <boost/test/unit_test.hpp>
+#include <boost/test/unit_test_monitor.hpp>
+
+namespace issues210
+{
+  namespace outcome = BOOST_OUTCOME_V2_NAMESPACE;
+
+  struct error
+  {
+    boost::system::error_code code;
+  };
+
+  // say that my custom error code type is error code compatible
+  inline boost::system::error_code make_error_code(error error) noexcept { return error.code; }
+
+  template <typename T> using custom_result = outcome::basic_result<T, error, outcome::policy::default_policy<T, error, void>>;
+
+  // source of custom result type with error code compatible error type
+  inline custom_result<int> funcA(int x) { return x; }
+
+  // Is the custom result type explicitly constructible to an ordinary result type?
+  inline outcome::result<int> funcB(int x) { return outcome::result<int>(funcA(x)); }
+
+  // Does the custom result type TRY-convert to an ordinary result type?
+  inline outcome::result<int> func1(int x)
+  {
+    BOOST_OUTCOME_TRY(y, funcA(x));
+    return funcB(y);
+  }
+
+  // Is the custom result type explicitly constructible to an ordinary outcome type?
+  inline outcome::outcome<int> funcC(int x) { return outcome::outcome<int>(funcA(x)); }
+
+  // Does the custom result type TRY-convert to an ordinary outcome type?
+  inline outcome::outcome<int> func2(int x)
+  {
+    BOOST_OUTCOME_TRY(y, funcA(x));
+    return funcC(y);
+  }
+}  // namespace issues210
+
+
+BOOST_OUTCOME_AUTO_TEST_CASE(issues_0210_test, "result<int, E> with error code compatible custom E does not TRY into a result<int, boost::system::error_code> function")
+{
+  BOOST_CHECK(issues210::func1(5).value() == 5);
+  BOOST_CHECK(issues210::func2(5).value() == 5);
+}