Exception after using install --force

[calebd]

I am unable to install a given application or package after using the --force option. Attempting to install (with or without force) after the first force install results in the following error:

Error: undefined method `extname' for nil:NilClass
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/container/criteria.rb:43:in `extension'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/container/pkg.rb:3:in `me?'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/container.rb:50:in `block in for_path'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/container.rb:48:in `each'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/container.rb:48:in `find'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/container.rb:48:in `for_path'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/installer.rb:85:in `extract_primary_container'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/installer.rb:52:in `install'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/cli/install.rb:20:in `block in install_casks'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/cli/install.rb:17:in `each'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/cli/install.rb:17:in `install_casks'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/cli/install.rb:6:in `run'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/cli.rb:81:in `run_command'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/cli.rb:121: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:142:in `<main>'

[rolandwalker]

Hi! Thanks!

It does look like a bug, but it is likely to be dependent on the Cask, so we should have the exact sequence of commands you used. (Incidentally, --force does not store any state, at least not intentionally.)

[calebd]

I tried it with two different casks to be sure. Here was the sequence of events:

I ran brew cask instal sonos since the Sonos app kept bugging me about an update. It didn’t install since I already had it installed, so I ran brew cask install sonos --force. That’s when I got the error. Now I am unable to run either install or install --force without encountering the exception.

I was able to reproduce the bug with the Reveal cask.

[andreineculau]

i just noticed something similar, although my command is brew cask install appfresh, no --force

// UPDATE sorry for hijacking your thread, @calebd . It's actually a similar error, but not the same
Error: undefined method 'extname' for 0:Fixnum.

/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/container/criteria.rb:43:in `extension'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/container/pkg.rb:3:in `me?'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/container.rb:50:in `block in for_path'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/container.rb:48:in `each'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/container.rb:48:in `find'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/container.rb:48:in `for_path'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/installer.rb:85:in `extract_primary_container'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/installer.rb:52:in `install'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/cli/install.rb:20:in `block in install_casks'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/cli/install.rb:17:in `each'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/cli/install.rb:17:in `install_casks'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/cli/install.rb:6:in `run'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/cli.rb:81:in `run_command'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/cli.rb:121: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:142:in `<main>'

[jpmx]

Hi!,

Same error without --force and without Screenhero.dmg being mounted:

# brew update && brew upgrade brew-cask && brew cleanup && brew cask cleanup
Already up-to-date.
Error: brew-cask-0.49.0 already installed

# brew cask install screenhero
==> Downloading http://dl.screenhero.com/update/screenhero/Screenhero.dmg
Already downloaded: /Library/Caches/Homebrew/screenhero-latest.dmg
Error: undefined method `extname' for nil:NilClass
Please report this bug:
    https://github.com/caskroom/homebrew-cask/issues
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/container/criteria.rb:43:in `extension'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/container/pkg.rb:3:in `me?'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/container.rb:50:in `block in for_path'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/container.rb:48:in `each'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/container.rb:48:in `find'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/container.rb:48:in `for_path'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/installer.rb:85:in `extract_primary_container'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/installer.rb:52:in `install'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/cli/install.rb:20:in `block in install_casks'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/cli/install.rb:17:in `each'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/cli/install.rb:17:in `install_casks'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/cli/install.rb:6:in `run'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/cli.rb:81:in `run_command'
/usr/local/Cellar/brew-cask/0.49.0/rubylib/cask/cli.rb:121: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:142:in `<main>'

Full debug info:
https://gist.github.com/jpmx/4aa1356bbf0a58350edd

[rolandwalker]

I suspect a change on Homebrew's side. Closing as a duplicate, further updates will be in #7946.