--- /dev/null
+// RUN: clang-cc -fsyntax-only -verify %s
+
+// When looking up a namespace-name in a using-directive or
+// namespace-alias-definition, only namespace names are considered.
+
+struct ns1 {};
+void ns2();
+int ns3 = 0;
+
+namespace ns0 {
+ namespace ns1 {
+ struct test0 {};
+ }
+ namespace ns2 {
+ struct test1 {};
+ }
+ namespace ns3 {
+ struct test2 {};
+ }
+}
+
+using namespace ns0;
+
+namespace test3 = ns1;
+namespace test4 = ns2;
+namespace test5 = ns3;
+
+using namespace ns1;
+using namespace ns2;
+using namespace ns3;
+
+test0 a;
+test1 b;
+test2 c;
+