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diff --git a/src/boost/libs/contract/test/invariant/volatile.hpp b/src/boost/libs/contract/test/invariant/volatile.hpp
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+++ b/src/boost/libs/contract/test/invariant/volatile.hpp
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+
+// no #include guard
+
+// Copyright (C) 2008-2018 Lorenzo Caminiti
+// Distributed under the Boost Software License, Version 1.0 (see accompanying
+// file LICENSE_1_0.txt or a copy at http://www.boost.org/LICENSE_1_0.txt).
+// See: http://www.boost.org/doc/libs/release/libs/contract/doc/html/index.html
+
+// Test error if non-static inv declared volatile (unless PERMISSIVE #defined).
+
+#include <boost/contract/public_function.hpp>
+#include <boost/contract/check.hpp>
+
+struct a {
+    void invariant() volatile {}
+
+    void f() {
+        // Same for ctor and dtor (because they all use check_pre_post_inv).
+        boost::contract::check c = boost::contract::public_function(this);
+    }
+};
+
+int main() {
+    a aa;
+    aa.f();
+    return 0;
+}
+