Cant install the debugger gem - ruby-on-rails

Question

I can't install the debuggar gem.
I get this error and I have no ide why:
Building native extensions. This could take a while...
ERROR: Error installing debugger:
ERROR: Failed to build gem native extension.
/usr/local/rvm/rubies/ruby-1.9.3-p547/bin/ruby extconf.rb
checking for rb_method_entry_t.called_id in method.h... no
checking for rb_control_frame_t.method_id in method.h... no
checking for rb_method_entry_t.called_id in method.h... no
checking for rb_control_frame_t.method_id in method.h... no
Makefile creation failed
**************************************************************************
No source for ruby-1.9.3-p547 provided with debugger-ruby_core_source gem.
**************************************************************************
*** 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
--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=/usr/local/rvm/rubies/ruby-1.9.3-p547/bin/ruby
--with-ruby-dir
--without-ruby-dir
--with-ruby-include
--without-ruby-include=${ruby-dir}/include
--with-ruby-lib
--without-ruby-lib=${ruby-dir}/lib
extconf failed, exit code 1
Gem files will remain installed in /usr/local/rvm/gems/ruby-1.9.3-p547/gems/debugger-1.5.0 for inspection.
Results logged to /usr/local/rvm/gems/ruby-1.9.3-p547/extensions/x86_64-darwin-13/1.9.1/debugger-1.5.0/gem_make.out

Answer 1

I was having the same issue and this solved it for me:
gem update debugger-ruby_core_source
And then bundle install would work.

Answer 2

Try it:
bundle update debugger
And keep in your gemfile:
gem 'debugger'