1 files changed, 14 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/lookup/koenig8.C b/gcc/testsuite/g++.dg/lookup/koenig8.C
new file mode 100644
index 000000000..b5558552d
--- /dev/null
+++ b/gcc/testsuite/g++.dg/lookup/koenig8.C
@@ -0,0 +1,14 @@
+// PR c++/42026, DR 239
+// The local extern declaration prevents arg-dependent lookup.
+// { dg-do link }
+
+namespace NS {
+  class T { };
+  void g(T, int);
+}
+NS::T parm;
+void g(NS::T, float) { }
+int main() {
+  extern void g(NS::T, float);
+  g(parm, 1);
+}