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// PR c++/27640 template < class T > struct refcounted : virtual T { template < class A1 > refcounted (const A1 & a1) : T () { } }; struct nfsserv {}; template < class T > void sfsserver_cache_alloc (int *ns) { new refcounted < nfsserv > (*ns); } void usage () { sfsserver_cache_alloc < int > ( 0); }