1 files changed, 23 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/inherit/thunk4.C b/gcc/testsuite/g++.dg/inherit/thunk4.C
new file mode 100644
index 000000000..a6e913e59
--- /dev/null
+++ b/gcc/testsuite/g++.dg/inherit/thunk4.C
@@ -0,0 +1,23 @@
+// PR c++/21123
+
+struct A
+{
+  A( const A &a);
+  const A& operator=( const A& a);
+};
+
+struct B
+{
+  virtual A f();
+};
+
+struct C : virtual B
+{
+  virtual A f();
+  A a;
+};
+
+A C::f() 
+{
+  return a;
+}