Error running Cucumber's specs under RubyMine

gistfile1.txt

/Users/richard/.rvm/rubies/ruby-1.9.2-p136/bin/ruby -e $stdout.sync=true;$stderr.sync=true;load($0=ARGV.shift) /Users/richard/.rvm/gems/ruby-1.9.2-p136@cucumber/bin/rspec /Users/richard/Documents/Projects/hw/code/cucumber/spec/cucumber/ast/table_spec.rb --require teamcity/spec/runner/formatter/teamcity/formatter --format Spec::Runner::Formatter::TeamcityFormatter --example Table diff! should allow header mapping before diffing
Testing started at 1:44 PM ...
/Users/richard/Documents/Projects/hw/code/cucumber/cucumber.gemspec:55:in ``': No such file or directory - git ls-files (Errno::ENOENT)
	from /Users/richard/Documents/Projects/hw/code/cucumber/cucumber.gemspec:55:in `block in <main>'
	from /Users/richard/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1346:in `initialize'
	from /Users/richard/Documents/Projects/hw/code/cucumber/cucumber.gemspec:5:in `new'
	from /Users/richard/Documents/Projects/hw/code/cucumber/cucumber.gemspec:5:in `<main>'
	from /Users/richard/.rvm/gems/ruby-1.9.2-p136@global/gems/bundler-1.0.18/lib/bundler.rb:239:in `eval'
	from /Users/richard/.rvm/gems/ruby-1.9.2-p136@global/gems/bundler-1.0.18/lib/bundler.rb:239:in `rescue in block in load_gemspec'
	from /Users/richard/.rvm/gems/ruby-1.9.2-p136@global/gems/bundler-1.0.18/lib/bundler.rb:234:in `block in load_gemspec'
	from /Users/richard/.rvm/gems/ruby-1.9.2-p136@global/gems/bundler-1.0.18/lib/bundler.rb:232:in `chdir'
	from /Users/richard/.rvm/gems/ruby-1.9.2-p136@global/gems/bundler-1.0.18/lib/bundler.rb:232:in `load_gemspec'
	from /Users/richard/.rvm/gems/ruby-1.9.2-p136@global/gems/bundler-1.0.18/lib/bundler/dsl.rb:32:in `gemspec'
	from /Users/richard/Documents/Projects/hw/code/cucumber/Gemfile:2:in `evaluate'
	from /Users/richard/.rvm/gems/ruby-1.9.2-p136@global/gems/bundler-1.0.18/lib/bundler/dsl.rb:7:in `instance_eval'
	from /Users/richard/.rvm/gems/ruby-1.9.2-p136@global/gems/bundler-1.0.18/lib/bundler/dsl.rb:7:in `evaluate'
	from /Users/richard/.rvm/gems/ruby-1.9.2-p136@global/gems/bundler-1.0.18/lib/bundler/definition.rb:17:in `build'
	from /Users/richard/.rvm/gems/ruby-1.9.2-p136@global/gems/bundler-1.0.18/lib/bundler.rb:136:in `definition'
	from /Users/richard/.rvm/gems/ruby-1.9.2-p136@global/gems/bundler-1.0.18/lib/bundler.rb:124:in `load'
	from /Users/richard/.rvm/gems/ruby-1.9.2-p136@global/gems/bundler-1.0.18/lib/bundler.rb:107:in `setup'
	from /Users/richard/.rvm/gems/ruby-1.9.2-p136@global/gems/bundler-1.0.18/lib/bundler/setup.rb:17:in `<top (required)>'
	from <internal:lib/rubygems/custom_require>:29:in `require'
	from <internal:lib/rubygems/custom_require>:29:in `require'

Process finished with exit code 1