1 files changed, 12 insertions, 0 deletions

diff --git a/gcc/testsuite/g++.dg/lookup/using13.C b/gcc/testsuite/g++.dg/lookup/using13.C
new file mode 100644
index 00000000000..c102fdcf872
--- /dev/null
+++ b/gcc/testsuite/g++.dg/lookup/using13.C
@@ -0,0 +1,12 @@
+// { dg-do compile }
+
+// Origin: Stefan Straßer <sstrasser@systemhaus-gruppe.de>
+
+// PR c++/20240: 
+
+namespace A { int a; }
+
+namespace C{
+  int a;
+  using A::a;		// { dg-error "already declared" }
+}