gcc/testsuite/g++.old-deja/g++.mike/dyncast8.C

#include <typeinfo>

class Base
{
public:
  virtual ~Base() { }
};

class Derived : public Base { };

int main()
{
    const Derived b;
    const Base*   ap = &b;

    const Derived* p1 = dynamic_cast<const Derived*>(ap);
    return p1 == 0;
}