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extern "C" void abort();
int ic;
struct X
{
X() { ++ic; }
X( const X & ) { ++ic; }
~X() { if (--ic < 0) abort(); }
};
struct V
{
virtual ~V() {}
};
struct A : public virtual V
{
};
struct B : public virtual V
{
virtual void foo( X ) = 0;
};
struct D : public A, public virtual B
{
virtual void foo( X ) {}
};
int main()
{
B *b = new D;
b->foo( X() );
}
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