Add testcase accidentally not committed earlier

	* testsuite/20_util/duration/arithmetic/dr3050.cc: Add new test
	missed from recent commit.

From-SVN: r261810

libstdc++-v3/ChangeLog

+2018-06-20  Jonathan Wakely  <jwakely@redhat.com>
+
+	* testsuite/20_util/duration/arithmetic/dr3050.cc: Add new test
+	missed from recent commit.
+
 2018-06-19  Jonathan Wakely  <jwakely@redhat.com>
 
 	* include/std/utility: Remove unused <exception> header.

libstdc++-v3/testsuite/20_util/duration/arithmetic/dr3050.cc

+// Copyright (C) 2018 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+// { dg-do compile { target c++11 } }
+
+#include <chrono>
+
+struct X { operator int64_t() /* not const */; };
+
+void test01(std::chrono::seconds s, X x)
+{
+  s * x; // { dg-error "no match" }
+  x * s; // { dg-error "no match" }
+  s / x; // { dg-error "no match" }
+  s % x; // { dg-error "no match" }
+}