bundle exec rake install:local
usr/local/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/rubygems_integration.rb:64:in `rescue in validate': The gemspec at /usr/local/bundle/specifications/treetop-1.4.15.gemspec is not valid. Please fix this gemspec. (Gem::InvalidSpecificationException)
The validation error was 'duplicate dependency on polyglot (>= 0.3.1), (>= 0) use:
add_runtime_dependency 'polyglot', '>= 0.3.1', '>= 0'
'
from /usr/local/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/rubygems_integration.rb:60:in `validate'
from /usr/local/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/source/path.rb:158:in `validate_spec'
from /usr/local/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/source/path.rb:172:in `block in load_spec_files'
from /usr/local/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/source/path.rb:166:in `each'
from /usr/local/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/source/path.rb:166:in `load_spec_files'
from /usr/local/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/source/path.rb:97:in `local_specs'
from /usr/local/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/source/path.rb:105:in `specs'
from /usr/local/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/definition.rb:587:in `specs_for_source_changed?'
from /usr/local/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/definition.rb:572:in `specs_changed?'
from /usr/local/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/definition.rb:613:in `block in converge_paths'
from /usr/local/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/definition.rb:612:in `any?'
from /usr/local/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/definition.rb:612:in `converge_paths'
from /usr/local/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/definition.rb:108:in `initialize'
from /usr/local/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/dsl.rb:200:in `new'
from /usr/local/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/dsl.rb:200:in `to_definition'
from /usr/local/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/dsl.rb:12:in `evaluate'
from /usr/local/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/definition.rb:33:in `build'
from /usr/local/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler.rb:129:in `definition'
from /usr/local/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler.rb:95:in `setup'
from /usr/local/lib/ruby/gems/2.3.0/gems/bundler-1.15.3/lib/bundler/setup.rb:19:in `<top (required)>'
from /usr/local/lib/ruby/site_ruby/2.3.0/rubygems/core_ext/kernel_require.rb:133:in `require'
from /usr/local/lib/ruby/site_ruby/2.3.0/rubygems/core_ext/kernel_require.rb:133:in `rescue in require'
from /usr/local/lib/ruby/site_ruby/2.3.0/rubygems/core_ext/kernel_require.rb:40:in `require'
from /usr/local/bundle/bin/rake:15:in `<main>'