Error(s):

source_file.cpp:16:34: error: non-const lvalue reference to type 'int' cannot bind to an initializer list temporary
    fact_t_move(val_t &&value) : m_value{std::move(value)} {}
                                 ^      ~~~~~~~~~~~~~~~~~~
source_file.cpp:26:23: note: in instantiation of member function 'fact_t_move<int &>::fact_t_move' requested here
    fact_t_move<int&> fm2(x);
                      ^
1 error generated.