ctags config errors

[anpavlov]

Hi, I was so happy to find ctags config for swift in this project.
Unfortunately, running ctags with this config in .ctags results in multiple errors:
ctags: Warning: regcomp [[:<:]]class[[:>:]][[:space:]]+([[:alnum:]_]+): Invalid character class name
ctags: Warning: regcomp [[:<:]]enum[[:>:]][[:space:]]+([[:alnum:]_]+): Invalid character class name
ctags: Warning: regcomp [[:<:]]func[[:>:]][[:space:]]+([[:alnum:]_]+): Invalid character class name
ctags: Warning: regcomp [[:<:]]protocol[[:>:]][[:space:]]+([[:alnum:]_]+): Invalid character class name
ctags: Warning: regcomp [[:<:]]struct[[:>:]][[:space:]]+([[:alnum:]_]+): Invalid character class name
ctags: Warning: regcomp [[:<:]]extension[[:>:]][[:space:]]+([[:alnum:]_]+): Invalid character class name
ctags: Warning: regcomp [[:<:]]typealias[[:>:]][[:space:]]+([[:alnum:]_]+): Invalid character class name

What i'm doing wrong?
ctags version:
Universal Ctags 0.0.0(60e9073), Copyright (C) 2015 Universal Ctags Team
Universal Ctags is derived from Exuberant Ctags.
Exuberant Ctags 5.8, Copyright (C) 1996-2009 Darren Hiebert
Compiled: Jul 26 2016, 16:05:24
URL: https://ctags.io/
Optional compiled features: +wildcards, +regex, +option-directory, +coproc, +json

[keith]

Hmm. I assumed at first this would be because I've never tested these with universal ctags. But I compiled it locally and it seems to work as expected:

uctags: Warning: Language "Clojure" already defined
Universal Ctags 0.0.0(6587204c), Copyright (C) 2015 Universal Ctags Team
Universal Ctags is derived from Exuberant Ctags.
Exuberant Ctags 5.8, Copyright (C) 1996-2009 Darren Hiebert
  Compiled: Dec  8 2016, 11:23:11
  URL: https://ctags.io/
  Optional compiled features: +wildcards, +regex, +option-directory, +coproc, +xpath, +json, +yaml