hashcat Error: undefined method `each' for "unar":String

[philpraxis]

$ brew cask install hashcat
==> Installing Formula dependencies from Homebrew
Error: undefined method `each' for "unar":String
Please report this bug:
    https://github.com/caskroom/homebrew-cask/issues
/usr/local/Cellar/brew-cask/0.41.0/rubylib/cask/installer.rb:102:in `formula_dependencies'
/usr/local/Cellar/brew-cask/0.41.0/rubylib/cask/installer.rb:45:in `install'
/usr/local/Cellar/brew-cask/0.41.0/rubylib/cask/cli/install.rb:20:in `block in install_casks'
/usr/local/Cellar/brew-cask/0.41.0/rubylib/cask/cli/install.rb:17:in `each'
/usr/local/Cellar/brew-cask/0.41.0/rubylib/cask/cli/install.rb:17:in `install_casks'
/usr/local/Cellar/brew-cask/0.41.0/rubylib/cask/cli/install.rb:6:in `run'
/usr/local/Cellar/brew-cask/0.41.0/rubylib/cask/cli.rb:80:in `run_command'
/usr/local/Cellar/brew-cask/0.41.0/rubylib/cask/cli.rb:120:in `process'
/usr/local/bin/brew-cask.rb:42:in `<top (required)>'
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
/usr/local/Library/brew.rb:59:in `require?'
/usr/local/Library/brew.rb:137:in `<main>'
$ ruby -v
ruby 2.0.0p451 (2014-02-24 revision 45167) [universal.x86_64-darwin13]
$ uname -a
Darwin mb 13.3.0 Darwin Kernel Version 13.3.0: Tue Jun  3 21:27:35 PDT 2014; root:xnu-2422.110.17~1/RELEASE_X86_64 x86_64

$ brew cask doctor
==> OS X Version:
10.9.4
==> Hardware Architecture:
intel-64
==> Ruby Version:
2.0.0-p451
==> Ruby Path:
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby
==> Homebrew Version:
0.9.5
==> Homebrew Executable Path:
/usr/local/bin/brew
==> Homebrew Cellar Path:
/usr/local/Cellar
==> Homebrew Repository Path:
/usr/local
==> Homebrew Origin:
https://github.com/Homebrew/homebrew
==> Homebrew-cask Version:
0.41.0
==> Homebrew-cask Install Location:
/usr/local/Cellar/brew-cask/0.41.0
==> Homebrew-cask Cached Downloads:
/Library/Caches/Homebrew
/Library/Caches/Homebrew/Casks
0 files
0.00 megs
==> Homebrew-cask Default Tap Path:
/usr/local/Library/Taps/caskroom/homebrew-cask
==> Homebrew-cask Alternate Cask Taps:
<NONE>
==> Homebrew-cask Default Tap Cask Count:
1865
==> Contents of $LOAD_PATH:
/usr/local/Cellar/brew-cask/0.41.0/rubylib
/usr/local/Library/Homebrew
/Library/Ruby/Site/2.0.0
/Library/Ruby/Site/2.0.0/x86_64-darwin13
/Library/Ruby/Site/2.0.0/universal-darwin13
/Library/Ruby/Site
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/vendor_ruby/2.0.0
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/vendor_ruby/2.0.0/x86_64-darwin13
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/vendor_ruby/2.0.0/universal-darwin13
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/vendor_ruby
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/x86_64-darwin13
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/universal-darwin13
==> Contents of $RUBYLIB Environment Variable:
<NONE>
==> Contents of $RUBYOPT Environment Variable:
<NONE>
==> Contents of $RUBYPATH Environment Variable:
<NONE>
==> Contents of $RBENV_VERSION Environment Variable:
<NONE>
==> Contents of $CHRUBY_VERSION Environment Variable:
<NONE>
==> Contents of $GEM_HOME Environment Variable:
<NONE>
==> Contents of $GEM_PATH Environment Variable:
<NONE>
==> Contents of $BUNDLE_PATH Environment Variable:
<NONE>
==> Contents of $PATH Environment Variable:
PATH="/opt/local/bin:/opt/local/sbin:/Library/Frameworks/Python.framework/Versions/2.7/bin:/opt/local/bin:/opt/local/sbin:/Library/Frameworks/Python.framework/Versions/2.7/bin:/Library/Frameworks/Python.framework/Versions/Current/bin:/Library/Frameworks/Python.framework/Versions/Current/bin:/opt/local/bin:/usr/local/bin:/usr/local/sbin:/usr/local/mysql/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/opt/X11/bin:/usr/local/MacGPG2/bin:/opt/local/Library/Frameworks/Python.framework/Versions/2.7/bin:/usr/local/build:/usr/local/build/w3af:/bin:/opt/local/bin:/opt/local/sbin:/opt/local/Library/Frameworks/Python.framework/Versions/2.6/bin:/Applications/Wireshark.app/Contents/Resources/bin::/usr/local/Library/Contributions/cmd"
==> Contents of $SHELL Environment Variable:
SHELL="/bin/bash"
==> Contents of Locale Environment Variables:
LANG="en_US.UTF-8"
==> Running As Privileged User:
No

[philpraxis]

$ brew install unar
Warning: unar-1.8.1 already installed

[rolandwalker]

Thanks! That's a bug I should have caught in #6138, but the test coverage is only on the syntax; this is deeper.

We will have to amend the code a cut a bugfix release, which will probably have to wait until tomorrow.

As a workaround, you can use a URL for a previous version of the Cask:

$ brew cask install 'https://raw.githubusercontent.com/caskroom/homebrew-cask/6f6a22fa07bad2ae7d047f41942137f99db20863/Casks/hashcat.rb'

[rolandwalker]

This should be fixed in Release v0.41.1. Let us know if the problem persists after:

$ brew update && brew upgrade brew-cask && brew cleanup && brew cask cleanup

[philpraxis]

Worked! Thanks a million!

2014-09-13 20:10:05 $ brew cask install hashcat
==> Installing Formula dependencies from Homebrew
unar ... already installed
==> Downloading https://hashcat.net/files/hashcat-0.47.7z
######################################################################## 100.0%
==> Symlinking Binary 'hashcat-cli64.app' to '/usr/local/bin/hashcat'
🍺  hashcat installed to '/opt/homebrew-cask/Caskroom/hashcat/0.47' (171 files, 13M)
2014-09-13 20:10:38 $