How to Install Gem Debugger in Ruby

To install debugger -> try using 'gem install debugger2' instead of debugger. 

Before:

Installing debugger-ruby_core_source 1.3.8

/Users/.rbenv/versions/2.1.2/lib/ruby/2.1.0/rubygems/ext/builder.rb:73: warning: Insecure world writable dir /usr/local in PATH, mode 040777

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    /Users/.rbenv/versions/2.1.2/bin/ruby extconf.rb 

*** extconf.rb failed ***

Could not create Makefile due to some reason, probably lack of necessary

libraries and/or headers.  Check the mkmf.log file for more details.  You may

need configuration options.

Provided configuration options:

--with-opt-dir

--without-opt-dir

--with-opt-include

--without-opt-include=${opt-dir}/include

--with-opt-lib

--without-opt-lib=${opt-dir}/lib

--with-make-prog

--without-make-prog

--srcdir=.

--curdir

--ruby=/Users/.rbenv/versions/2.1.2/bin/ruby

/Users/.rbenv/versions/2.1.2/lib/ruby/2.1.0/fileutils.rb:1573:in `stat': No such file or directory @ rb_file_s_stat - ./212/ruby_debug.h (Errno::ENOENT)

from /Users/osx/.rbenv/versions/2.1.2/lib/ruby/2.1.0/fileutils.rb:1573:in `block in fu_each_src_dest'

from /Users/osx/.rbenv/versions/2.1.2/lib/ruby/2.1.0/fileutils.rb:1587:in `fu_each_src_dest0'

from /Users/mac/.rbenv/versions/2.1.2/lib/ruby/2.1.0/fileutils.rb:1571:in `fu_each_src_dest'

from /Users/mac/.rbenv/versions/2.1.2/lib/ruby/2.1.0/fileutils.rb:399:in `cp'

from extconf.rb:83:in `block in <main>'

from extconf.rb:82:in `each'

from extconf.rb:82:in `<main>'

extconf failed, exit code 1

Gem files will remain installed in /Users/work/cucumber-obat24/vendor/ruby/2.1.0/gems/debugger-1.6.8 for inspection.

Results logged to /Users/work/cucumber-obat24/vendor/ruby/2.1.0/extensions/x86_64-darwin-13/2.1.0-static/debugger-1.6.8/gem_make.out

An error occurred while installing debugger (1.6.8), and Bundler cannot continue.

Make sure that `gem install debugger -v '1.6.8'` succeeds before bundling.

After:

Using debugger-linecache 1.2.0

/Users/.rbenv/versions/2.1.2/lib/ruby/2.1.0/rubygems/ext/builder.rb:73: warning: Insecure world writable dir /usr/local in PATH, mode 040777

Installing debugger2 1.0.0.beta2

Using rubyzip 1.1.0

Using ruby-ole 1.2.11.7

Using spreadsheet 0.9.6

Using roo 1.13.0

Using rspec-core 2.14.7

Using rspec-expectations 2.14.4

Using rspec-mocks 2.14.4

Using rspec 2.14.1

Using websocket 1.0.7

Using selenium-webdriver 2.38.0

Using tins 0.13.1

Using term-ansicolor 1.2.2

Using bundler 1.6.3

Your bundle is complete!

It was installed into ./vendor