clang-tests/gcc-4_2-testsuite/src/g++.dg/template/void10.C

//PR c++/28736

template<void> struct A                 // { dg-error "not a valid type" }
{
    template<typename> friend struct B;
};

template<typename> struct B {};

B<int> b;                              // { dg-error "template argument|invalid type" }