[Boost-users] [UTF] documentation of runtime configuration programmatically

Hello all, the documentation of Boost.Test contains the following sentence "The UTF provides two ways to set a parameter at runtime: by specifying a command line argument and by setting an environment variable. The command line argument always overrides the corresponding environment variable." However it does not explain how. For example if I add this line to my code it crashes: boost::runtime::env::get<bool>("BOOST_TEST_AUTO_START_DBG"); Anyone?