% hg debuginstall Checking encoding (ascii)... Checking extensions... Checking templates... Checking patch... Checking commit editor... Checking username... No problems detected % hg debuginstall with no username Checking encoding (ascii)... Checking extensions... Checking templates... Checking patch... Checking commit editor... Checking username... no username supplied (see "hg help config") (specify a username in your configuration file) 1 problems detected, please check your install!