llvm-gcc-4.2/gcc/testsuite/g++.dg/template/sizeof11.C

// PR c++/29435

template < class T > struct A {};
template < int> void g()
{
  sizeof (A < int>);
}

template < class T > struct B;
template < int> void f()
{
  sizeof (B<int>); // { dg-error "incomplete" }
}