Can't handle 1.9.x error when trying to install linecache with Ruby 2.1.1 - ruby

Question

I am trying to install linecache with RVM on Ruby 2.1.1.
$ ruby --version
ruby 2.1.2p95 (2014-05-08 revision 45877) [x86_64-linux]
I run bundle install
$ bundle install
It blows saying it isn't compatible with 1.9.x when I run bundle install:
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
/home/g/.rvm/rubies/ruby-2.1.2/bin/ruby extconf.rb
Can't handle 1.9.x yet
*** 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=/home/g/.rvm/rubies/ruby-2.1.2/bin/ruby
extconf failed, exit code 1
Gem files will remain installed in /home/g/.rvm/gems/ruby-2.1.2/gems/linecache-0.46
for inspection.
Results logged to /home/g/.rvm/gems/ruby-2.1.2/extensions/x86_64-linux/2.1.0
/linecache-0.46/gem_make.out
An error occurred while installing linecache (0.46), and Bundler cannot continue.
Make sure that `gem install linecache -v '0.46'` succeeds before bundling.
Any ideas whats happening here?

Answer 1

Linecache hasn't been updated in 3 years, the last update was bringing it up to version 1.9.3. Unless you're pulling it from someone else's fork, since you're using 2.1.1 the gem won't work. Most likely the error message hasn't been updated so it just tells you it's invalid for 1.9.x since it doesn't know about any newer versions.