#lang
ctags: Warning: Unknown language: NOSUCHLANG (ignoring "--extras-NOSUCHLANG")
ctags: Warning: Unknown language: NOSUCHLANG (ignoring "--extras-NOSUCHLANG")
ctags: Unknown language "NOSUCHLANG" in "list-extras" option
#extras
ctags: no such extra: 'NOSUCHEXTRA'
ctags: no such extra: 'NOSUCHEXTRA'
ctags: no such extra: 'NOSUCHEXTRA'
#null
ctags: No language given in "extras-" option
#null null
ctags: No language given in "extras-" option