bundle exec rake html5:generate

watir_html_generate.sh

➜  bundle exec rake html5:generate
rake aborted!
invalid byte sequence in US-ASCII
/Users/p0deje/Development/watir-webdriver/vendor/bundle/ruby/1.9.1/gems/treetop-1.4.12/lib/treetop/compiler/grammar_compiler.rb:34:in `gsub!'
/Users/p0deje/Development/watir-webdriver/vendor/bundle/ruby/1.9.1/gems/treetop-1.4.12/lib/treetop/compiler/grammar_compiler.rb:34:in `block in load'
/Users/p0deje/Development/watir-webdriver/vendor/bundle/ruby/1.9.1/gems/treetop-1.4.12/lib/treetop/compiler/grammar_compiler.rb:32:in `open'
/Users/p0deje/Development/watir-webdriver/vendor/bundle/ruby/1.9.1/gems/treetop-1.4.12/lib/treetop/compiler/grammar_compiler.rb:32:in `load'
/Users/p0deje/Development/watir-webdriver/vendor/bundle/ruby/1.9.1/gems/polyglot-0.3.3/lib/polyglot.rb:47:in `load'
/Users/p0deje/Development/watir-webdriver/vendor/bundle/ruby/1.9.1/gems/polyglot-0.3.3/lib/polyglot.rb:66:in `rescue in require'
/Users/p0deje/Development/watir-webdriver/vendor/bundle/ruby/1.9.1/gems/polyglot-0.3.3/lib/polyglot.rb:63:in `require'
/Users/p0deje/Development/watir-webdriver/vendor/bundle/ruby/1.9.1/gems/webidl-0.1.5/lib/webidl.rb:58:in `<top (required)>'
/Users/p0deje/Development/watir-webdriver/lib/watir-webdriver/html.rb:4:in `require'
/Users/p0deje/Development/watir-webdriver/lib/watir-webdriver/html.rb:4:in `<top (required)>'
/Users/p0deje/Development/watir-webdriver/Rakefile:30:in `require'
/Users/p0deje/Development/watir-webdriver/Rakefile:30:in `block (2 levels) in <top (required)>'
Tasks: TOP => html5:generate => html5:html_lib
(See full trace by running task with --trace)