1 files changed, 22 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/g++.dg/warn/Wzero-as-null-pointer-constant-4.C b/gcc-4.9/gcc/testsuite/g++.dg/warn/Wzero-as-null-pointer-constant-4.C
new file mode 100644
index 000000000..548caac36
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/g++.dg/warn/Wzero-as-null-pointer-constant-4.C
@@ -0,0 +1,22 @@
+// PR c++/51299
+// { dg-options "-Wzero-as-null-pointer-constant" }
+
+class Base
+{
+  public:
+  virtual ~Base();
+};
+
+class Derived : public Base
+{
+};
+
+void foo(Base* b)
+{
+  Derived* d = dynamic_cast<Derived*>(b);
+}
+
+void bar(Base& b)
+{
+  Derived& d = dynamic_cast<Derived&>(b);
+}