1 files changed, 17 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/lookup/ns2.C b/gcc/testsuite/g++.dg/lookup/ns2.C
new file mode 100644
index 000000000..2ad2ec0e3
--- /dev/null
+++ b/gcc/testsuite/g++.dg/lookup/ns2.C
@@ -0,0 +1,17 @@
+// PR c++/18161
+
+namespace m
+{
+  namespace n
+  {
+  }
+}
+
+namespace n
+{
+}
+
+namespace o
+{
+  namespace n = ::m::n;
+}