1 files changed, 17 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/lookup/using22.C b/gcc/testsuite/g++.dg/lookup/using22.C
new file mode 100644
index 00000000000..2396f9ab185
--- /dev/null
+++ b/gcc/testsuite/g++.dg/lookup/using22.C
@@ -0,0 +1,17 @@
+// PR c++/39786
+
+namespace A {
+    char (*f(char *p))[13] { return 0; }
+}
+
+namespace B {
+    namespace C {
+        char (*f(int p))[42] { return 0; }
+    }
+    using namespace C;
+}
+
+using namespace B;
+using namespace A;
+
+char x[sizeof *::f(0) == 42 ? 1 : -1];