Demonstration of bundler issue with nested bundle exec combined with openssl

Dockerfile

# Reproduction of nested call bug with bundler 1.14.6
FROM ruby:2.4.0

RUN gem update openssl

RUN mkdir bbug
WORKDIR /bbug
RUN gem install bundler --version '1.14.6'
RUN echo "#!/usr/bin/env ruby\nrequire 'openssl'\np OpenSSL::VERSION" > a.rb
RUN touch Gemfile
RUN bundle
RUN chmod +x a.rb
RUN ./a.rb
RUN bundle exec ./a.rb
RUN bundle exec bundle exec ./a.rb
RUN bundle -v