Command-t.vim crash on yosemite

The bug

Today I updraged my mac osx to 10.10 yosemite,
However, the command-t.vim plugin does not work correctly with new os.

I saw the command-t.vim could not load the C extension message from vim.

The solution

First I update my xcode version and install newer command-line tool from xcode
Then I got a different error from vim
After google on internet
I figure out because the system ruby version is updated on yosemite
The command-t plugin might not compiled with new system ruby.
So I have to recompile it with system ruby then link it.
So the solusion with rbenv is:

cd ~/.vim/bundle/command-t/ruby/command-t/
rbenv local system
ruby extconf.rb
make clean # remember to clean old ruby file before recompile
make