problem with dump_lines.cc example

[AssoGu]

im getting compelation error in line 37.
dwarf::dwarf dw(dwarf::elf::create_loader(ef));

error:
Problem description: Invalid arguments ' Candidates are: dwarf(const std::shared_ptr &) dwarf(const dwarf::dwarf &) dwarf(dwarf::dwarf &&) '

any idea what can cause the problem?

thanks!