brew cask list returns Error: undefined method 'undent'

[gusc]

I've run into a problem while listing installed Casks

The command brew cask list return this error:

$ brew cask list
Error: undefined method `undent' for #<String:0x0000000102ddc9a0>
Follow the instructions here:
  https://github.com/Homebrew/homebrew-cask#reporting-bugs
/usr/local/Caskroom/java7/.metadata/1.7.0_80/20160405150246.028/Casks/java7.rb:64:in `block in load'
/usr/local/Homebrew/Library/Homebrew/cask/lib/hbc/cask.rb:36:in `instance_eval'
/usr/local/Homebrew/Library/Homebrew/cask/lib/hbc/cask.rb:36:in `initialize'
/usr/local/Homebrew/Library/Homebrew/cask/lib/hbc/cask_loader.rb:31:in `new'
/usr/local/Homebrew/Library/Homebrew/cask/lib/hbc/cask_loader.rb:31:in `cask'
/usr/local/Homebrew/Library/Homebrew/cask/lib/hbc/cask_loader.rb:67:in `cask'
/usr/local/Homebrew/Library/Homebrew/compat/hbc/cask_loader.rb:15:in `cask'
/usr/local/Caskroom/java7/.metadata/1.7.0_80/20160405150246.028/Casks/java7.rb:1:in `load'
/usr/local/Homebrew/Library/Homebrew/cask/lib/hbc/cask_loader.rb:57:in `instance_eval'
/usr/local/Homebrew/Library/Homebrew/cask/lib/hbc/cask_loader.rb:57:in `load'
/usr/local/Homebrew/Library/Homebrew/cask/lib/hbc/caskroom.rb:34:in `block in casks'
/usr/local/Homebrew/Library/Homebrew/cask/lib/hbc/caskroom.rb:28:in `map'
/usr/local/Homebrew/Library/Homebrew/cask/lib/hbc/caskroom.rb:28:in `casks'
/usr/local/Homebrew/Library/Homebrew/cask/lib/hbc/cli/list.rb:40:in `list_installed'
/usr/local/Homebrew/Library/Homebrew/cask/lib/hbc/cli/list.rb:14:in `run'
/usr/local/Homebrew/Library/Homebrew/cask/lib/hbc/cli/abstract_command.rb:33:in `run'
/usr/local/Homebrew/Library/Homebrew/cask/lib/hbc/cli.rb:93:in `run_command'
/usr/local/Homebrew/Library/Homebrew/cask/lib/hbc/cli.rb:157:in `run'
/usr/local/Homebrew/Library/Homebrew/cask/lib/hbc/cli.rb:122:in `run'
/usr/local/Homebrew/Library/Homebrew/cmd/cask.rb:7:in `cask'
/usr/local/Homebrew/Library/Homebrew/brew.rb:87:in `<main>'

brew cask doctor output:

$ brew cask doctor
==> Homebrew-Cask Version
Homebrew-Cask 1.7.0-50-g679eda3
Homebrew/homebrew-cask (git revision 9f04f0; last commit 2018-07-19)
==> macOS
10.13.6
==> SIP
Enabled
==> Java
1.8.0_131, 1.7.0_80
==> Homebrew-Cask Install Location
<NONE>
==> Homebrew-Cask Staging Location
/usr/local/Caskroom
==> Homebrew-Cask Cached Downloads
~/Library/Caches/Homebrew/Cask
==> Homebrew-Cask Taps:
/usr/local/Homebrew/Library/Taps/homebrew/homebrew-cask (3997 casks)
/usr/local/Homebrew/Library/Taps/homebrew/homebrew-cask-versions (185 casks)
==> Contents of $LOAD_PATH
/usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.7/lib/ruby/gems/2.3.0/gems/did_you_mean-1.0.0/lib
/usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.7/lib/ruby/site_ruby/2.3.0
/usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.7/lib/ruby/site_ruby/2.3.0/x86_64-darwin9.0
/usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.7/lib/ruby/site_ruby/2.3.0/universal-darwin9.0
/usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.7/lib/ruby/site_ruby
/usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.7/lib/ruby/vendor_ruby/2.3.0
/usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.7/lib/ruby/vendor_ruby/2.3.0/x86_64-darwin9.0
/usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.7/lib/ruby/vendor_ruby/2.3.0/universal-darwin9.0
/usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.7/lib/ruby/vendor_ruby
/usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.7/lib/ruby/2.3.0
/usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.7/lib/ruby/2.3.0/x86_64-darwin9.0
/usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.7/lib/ruby/2.3.0/universal-darwin9.0
/usr/local/Homebrew/Library/Homebrew/cask/lib
/usr/local/Homebrew/Library/Homebrew
==> Environment Variables
LC_ALL="en_US.UTF-8"
PATH="/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/Homebrew/Library/Homebrew/shims/scm"
SHELL="/bin/bash"

Looks like java7 cask issue, but how to solve this properly?

[vitorgalvao]

Next time, please fill the template.

#49716