Ruby stopped working on my brother's machine recently. gem commands rails server rails console All failed with the following error: $ irb irb(main):001:0> require 'digest/sha1' LoadError: dlopen(~/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/x86_64-darwin12.2.0/digest/sha1.bundle, 9): Symbol not found: _rb_Digest_SHA1_Finish Referenced from: ~/.rbenv/versions/2.0.0-p0/lib/ruby/2.0.0/x86_64-darwin12.2.0
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