yaws.erl:1677: The pattern 'false' can never match the type [[any()]]

yaws.erl:2759: Guard test Ret::'file' == 'fd' can never succeed

yaws.erl:2767: Guard test Ret::'file' == 'binfd' can never succeed

yaws_api.erl:2606: The pattern 'false' can never match the type 'true'

yaws_config.erl:671: The pattern 'false' can never match the type 'true'

yaws_ctl.erl:518: Function hup/1 has no local return

yaws_ctl.erl:523: Function stop/1 has no local return

yaws_ctl.erl:527: Function status/1 has no local return

yaws_ctl.erl:530: Function load/1 has no local return

yaws_ctl.erl:548: Function trace/1 has no local return

yaws_ctl.erl:551: Function debug_dump/1 has no local return

yaws_ctl.erl:554: Function stats/1 has no local return

yaws_ctl.erl:556: Function running_config/1 has no local return

yaws_revproxy.erl:668: The pattern 'true' can never match the type 'false'

yaws_sendfile.erl:53: The pattern 'false' can never match the type 'true'

yaws_sup_restarts.erl:49: The pattern 'false' can never match the type 'true'