gcc/testsuite/g++.old-deja/g++.law/vtable2.C

// Build don't link: 
// Special g++ Options: -fvtable-thunks
// GROUPS passed vtable
struct C1
{
    virtual ~C1();
};

struct C2 : public virtual C1
{
        virtual ~C2();
};

struct C3 : public virtual C2
{
    virtual ~C3();
};

C3::~C3() {}