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I am trying to install Command-T on MacVim. I followed the installation instructions exactly but I get this error when trying to start MacVim (from a terminal via the mvim command line utility).

dyld: lazy symbol binding failed: Symbol not found: _rb_intern2
  Referenced from: /Users/mark/.vim/ruby/command-t/ext.bundle
  Expected in: flat namespace

dyld: Symbol not found: _rb_intern2
  Referenced from: /Users/mark/.vim/ruby/command-t/ext.bundle
  Expected in: flat namespace

Vim: Caught deadly signal TRAP
Vim: Finished.
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up vote 8 down vote accepted

You need to compile Command-T with Ruby v 1.8.7. Use RVM to switch between ruby versions. After you compiled the source you may switch back to your other ruby version.

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Ok, I'll try this when I get the chance. Thanks! – Wuffers Feb 22 '11 at 13:23
    
Awesome! That worked! Thanks ^^ – Wuffers Feb 22 '11 at 22:27
    
Great answer! Helped me. – Dmitriy Ugnichenko Jan 10 '13 at 11:26
    
Yup, installed 1.8.7 with rbenv, deleted ~/.vim/ruby/command-t and re-sourced the vimball, use 1.8.7 to ruby extconf.rb and then things worked great. – meagar Dec 10 '13 at 16:43

For me the problem was that I compiled Command-T with a MacPorts ruby version (/opt/local/bin/ruby).

When I recompiled with /usr/bin/ruby, the version that is shipped with OS X, the issue was resolved and everything worked fine.

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