gistfile1.txt

Error: value must be enumerable
Please report this bug:
    https://github.com/Homebrew/homebrew/wiki/troubleshooting
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/set.rb:281:in `|'
/usr/local/Library/Homebrew/options.rb:87:in `|'
/usr/local/Library/Homebrew/formula_installer.rb:320:in `effective_build_options_for'
/usr/local/Library/Homebrew/formula_installer.rb:296:in `expand_dependencies'
/usr/local/Library/Homebrew/dependency.rb:102:in `action'
/usr/local/Library/Homebrew/dependency.rb:100:in `catch'
/usr/local/Library/Homebrew/dependency.rb:100:in `action'
/usr/local/Library/Homebrew/dependency.rb:83:in `expand'
/usr/local/Library/Homebrew/dependencies.rb:9:in `each'
/usr/local/Library/Homebrew/dependencies.rb:9:in `each'
/usr/local/Library/Homebrew/dependency.rb:79:in `expand'
/usr/local/Library/Homebrew/dependency.rb:87:in `expand'
/usr/local/Library/Homebrew/dependency.rb:79:in `each'
/usr/local/Library/Homebrew/dependency.rb:79:in `expand'
/usr/local/Library/Homebrew/formula_installer.rb:294:in `expand_dependencies'
/usr/local/Library/Homebrew/extend/ARGV.rb:184:in `filter_for_dependencies'
/usr/local/Library/Homebrew/formula_installer.rb:293:in `expand_dependencies'
/usr/local/Library/Homebrew/formula_installer.rb:234:in `compute_and_install_dependencies'
/usr/local/Library/Homebrew/formula_installer.rb:157:in `install'
/usr/local/Library/Homebrew/cmd/upgrade.rb:74:in `upgrade_formula'
/usr/local/Library/Homebrew/cmd/upgrade.rb:49:in `upgrade'
/usr/local/Library/Homebrew/cmd/upgrade.rb:49:in `each'
/usr/local/Library/Homebrew/cmd/upgrade.rb:49:in `upgrade'
/usr/local/Library/brew.rb:105:in `send'
/usr/local/Library/brew.rb:105