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// PR c++/52043
// { dg-options "-std=c++11 -Wreturn-type" }
template < class T > struct Container
{
T f ();
};
template < class T >
T deref (T)
{} // { dg-warning "no return" }
template < class T, class ... Args >
auto deref (T u, int, Args ... args)->decltype (deref (u.f (), args ...))
{} // { dg-warning "no return" }
void
foo ()
{
Container < Container < int > > v;
deref (v, 2);
}
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