rvm prob

gistfile1.txt

[2013-09-09 11:26:25] requirements_osx_brew_update_system
requirements_osx_brew_update_system () 
{ 
    if __rvm_version_compare "${_system_version}" -ge 10.7; then
        __rvm_detect_xcode_version_at_least 4.6.2 || __CLT_version_at_least 4.6.0 || { 
            typeset ret=$?;
            rvm_error "
Xcode version older than 4.6.2 installed, download and install newer version from:

    http://connect.apple.com

After installation open Xcode, go to Downloads and install Command Line Tools.
";
            return $ret
        };
    fi;
    brew update || { 
        typeset ret=$?;
        rvm_error "Failed to update Homebrew, follow instructions here:
    https://github.com/mxcl/homebrew/wiki/Common-Issues
and make sure \`brew update\` works before continuing.";
        return $ret
    }
}
current path: /Users/captainproton/code/exercises/avdi/objects-on-rails/bloog
command(2): requirements_osx_brew_update_system ruby-1.9.3-p448
error: The following untracked working tree files would be overwritten by merge:
  Library/Formula/bigloo.rb
Please move or remove them before you can merge.
Aborting
Error: Failure while executing: git pull -q origin refs/heads/master:refs/remotes/origin/master
Failed to update Homebrew, follow instructions here:
    https://github.com/mxcl/homebrew/wiki/Common-Issues
and make sure `brew update` works before continuing.