Brew Cask Reports "Error: Cask 'avast' is unavailable: No Cask with this name exists." on Every Command

[ibrokemypie]

General troubleshooting steps

• I have retried my command with --force and the issue is still present.
• I have checked the instructions for reporting bugs (or making requests) before opening the issue.
  • None of the templates was appropriate for my issue, or I’m not sure.
• I ran brew update-reset && brew update and retried my command.
• I ran brew doctor, fixed as many issues as possible and retried my command.
• I understand that if I ignore these instructions, my issue may be closed without review.

Description of issue

Wshen attempting any command, the command fails and instead says Error: Cask 'avast' is unavailable: No Cask with this name exists.

Output of your command with --verbose --debug

$ cask list --verbose --debug
Error: Cask 'avast' is unavailable: No Cask with this name exists.
/usr/local/Homebrew/Library/Homebrew/cask/lib/hbc/cask_loader.rb:159:in `load'
/usr/local/Homebrew/Library/Homebrew/cask/lib/hbc/cask_loader.rb:168:in `load'
/usr/local/Homebrew/Library/Homebrew/cask/lib/hbc/scopes.rb:41:in `block in installed'
/usr/local/Homebrew/Library/Homebrew/cask/lib/hbc/scopes.rb:31:in `map'
/usr/local/Homebrew/Library/Homebrew/cask/lib/hbc/scopes.rb:31:in `installed'
/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:35:in `run'
/usr/local/Homebrew/Library/Homebrew/cask/lib/hbc/cli.rb:97:in `run_command'
/usr/local/Homebrew/Library/Homebrew/cask/lib/hbc/cli.rb:167:in `run'
/usr/local/Homebrew/Library/Homebrew/cask/lib/hbc/cli.rb:131:in `run'
/usr/local/Homebrew/Library/Homebrew/cmd/cask.rb:8:in `cask'
/usr/local/Homebrew/Library/Homebrew/brew.rb:100:in `<main>'
Error: Kernel.exit
/usr/local/Homebrew/Library/Homebrew/cask/lib/hbc/cli.rb:172:in `exit'
/usr/local/Homebrew/Library/Homebrew/cask/lib/hbc/cli.rb:172:in `rescue in run'
/usr/local/Homebrew/Library/Homebrew/cask/lib/hbc/cli.rb:155:in `run'
/usr/local/Homebrew/Library/Homebrew/cask/lib/hbc/cli.rb:131:in `run'
/usr/local/Homebrew/Library/Homebrew/cmd/cask.rb:8:in `cask'
/usr/local/Homebrew/Library/Homebrew/brew.rb:100:in `<main>'

Output of brew cask doctor

$ brew cask doctor
==> Homebrew-Cask Version
Homebrew-Cask 1.3.6-190-ge300713
caskroom/homebrew-cask (git revision 06759; last commit 2017-11-06)
==> Homebrew-Cask Install Location
<NONE>
==> Homebrew-Cask Staging Location
/usr/local/Caskroom
==> Homebrew-Cask Cached Downloads
~/Library/Caches/Homebrew/Cask (1 files, 960KB)
==> Homebrew-Cask Taps:
/usr/local/Homebrew/Library/Taps/caskroom/homebrew-cask (3797 casks)
/usr/local/Homebrew/Library/Taps/szhu/homebrew-personal (8 casks)
/usr/local/Homebrew/Library/Taps/caskroom/homebrew-drivers (131 casks)
/usr/local/Homebrew/Library/Taps/caskroom/homebrew-fonts (1125 casks)
/usr/local/Homebrew/Library/Taps/caskroom/homebrew-versions (175 casks)
/usr/local/Homebrew/Library/Taps/caskroom/homebrew-eid (10 casks)
==> Contents of $LOAD_PATH
/usr/local/Homebrew/Library/Homebrew/cask/lib
/usr/local/Homebrew/Library/Homebrew
/usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.3/lib/ruby/gems/2.3.0/gems/did_you_mean-1.0.0/lib
/usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.3/lib/ruby/site_ruby/2.3.0
/usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.3/lib/ruby/site_ruby/2.3.0/x86_64-darwin9.0
/usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.3/lib/ruby/site_ruby/2.3.0/universal-darwin9.0
/usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.3/lib/ruby/site_ruby
/usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.3/lib/ruby/vendor_ruby/2.3.0
/usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.3/lib/ruby/vendor_ruby/2.3.0/x86_64-darwin9.0
/usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.3/lib/ruby/vendor_ruby/2.3.0/universal-darwin9.0
/usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.3/lib/ruby/vendor_ruby
/usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.3/lib/ruby/2.3.0
/usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.3/lib/ruby/2.3.0/x86_64-darwin9.0
/usr/local/Homebrew/Library/Homebrew/vendor/portable-ruby/2.3.3/lib/ruby/2.3.0/universal-darwin9.0
==> Environment Variables
LANG="en_AU.UTF-8"
LC_ALL="en_AU.UTF-8"
PATH="/extra/home/perl5/bin:~/bin:/usr/local/bin:/usr/local/sbin:/Applications/Wine Staging.app/Contents/Resources/wine/bin:~/thingo/go/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Applications/VMware Fusion.app/Contents/Public:/usr/local/MacGPG2/bin:/opt/X11/bin:/Library/Frameworks/Mono.framework/Versions/Current/Commands:~/.config/Color-Scripts/color-scripts:/usr/local/Homebrew/Library/Homebrew/shims/scm"
SHELL="/usr/local/bin/zsh"

[commitay]

If /usr/local/Caskroom/avast exists, remove it.

[ibrokemypie]

That did solve it, but how did this happen?

[commitay]

The Cask was renamed b52e9a2

It has since been renamed again 9ab9061