Failed to install font-ubuntu-mono-derivative-powerline after commit b85f407e959d0420eaaaca25882335078aa70799

[ckyoog]

brew config output

HOMEBREW_VERSION: 3.4.11-171-g4054728
ORIGIN: https://github.com/Homebrew/brew.git
HEAD: 40547280302cf7add714fe765cc1f9f73b03c1fa
Last commit: 11 hours ago
Core tap ORIGIN: https://github.com/Homebrew/homebrew-core
Core tap HEAD: bb7727c3ab0f126740da1cc4005829f66cf6d1a6
Core tap last commit: 67 minutes ago
Core tap branch: master
HOMEBREW_PREFIX: /usr/local
HOMEBREW_CASK_OPTS: []
HOMEBREW_CORE_GIT_REMOTE: https://github.com/Homebrew/homebrew-core
HOMEBREW_DISPLAY: /private/tmp/com.apple.launchd.p3TPmd7qKr/org.xquartz:0
HOMEBREW_MAKE_JOBS: 4
Homebrew Ruby: 2.6.8 => /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/bin/ruby
CPU: quad-core 64-bit broadwell
Clang: 13.1.6 build 1316
Git: 2.32.1 => /Applications/Xcode.app/Contents/Developer/usr/bin/git
Curl: 7.79.1 => /usr/bin/curl
macOS: 12.4-x86_64
CLT: 13.4.0.0.1.1651278267
Xcode: 13.4

brew doctor output

Please note that these warnings are just used to help the Homebrew maintainers
with debugging if you file an issue. If everything you use Homebrew for is
working fine: please don't worry or file an issue; just ignore this. Thanks!

Warning: Some installed kegs have no formulae!
This means they were either deleted or installed manually.
You should find replacements for the following formulae:
  torrentcheck

Warning: Some installed formulae are deprecated or disabled.
You should find replacements for the following formulae:
  libelf
  ntfs-3g

Verification

• I ran brew update and am still able to reproduce my issue.
• I have resolved all warnings from brew doctor and that did not fix my problem.

What were you trying to do (and why)?

Trying to install font-ubuntu-mono-derivative-powerline

HOMEBREW_NO_AUTO_UPDATE=1 brew install font-ubuntu-mono-derivative-powerline

What happened (include all command output)?

The output

==> Cloning https://github.com/powerline/fonts/trunk/UbuntuMono
Updating /Users/ccgoo/Library/Caches/Homebrew/Cask/font-ubuntu-mono-derivative-powerline--svn
==> Checking out 53
Warning: No checksum defined for cask 'font-ubuntu-mono-derivative-powerline', skipping verification.
==> Installing Cask font-ubuntu-mono-derivative-powerline
==> Moving Font 'Ubuntu Mono derivative Powerline.ttf' to '/Users/ccgoo/Library/Fonts/Ubuntu Mono derivative Powerl
==> Moving Font 'Ubuntu Mono derivative Powerline Bold.ttf' to '/Users/ccgoo/Library/Fonts/Ubuntu Mono derivative P
==> Moving Font 'Ubuntu Mono derivative Powerline Bold Italic.ttf' to '/Users/ccgoo/Library/Fonts/Ubuntu Mono deriv
==> Moving Font 'Ubuntu Mono derivative Powerline Italic.ttf' to '/Users/ccgoo/Library/Fonts/Ubuntu Mono derivative
==> Backing Font 'Ubuntu Mono derivative Powerline Italic.ttf' up to '/usr/local/Caskroom/font-ubuntu-mono-derivati
==> Removing Font '/Users/ccgoo/Library/Fonts/Ubuntu Mono derivative Powerline Italic.ttf'
==> Backing Font 'Ubuntu Mono derivative Powerline Bold Italic.ttf' up to '/usr/local/Caskroom/font-ubuntu-mono-der
==> Removing Font '/Users/ccgoo/Library/Fonts/Ubuntu Mono derivative Powerline Bold Italic.ttf'
==> Backing Font 'Ubuntu Mono derivative Powerline Bold.ttf' up to '/usr/local/Caskroom/font-ubuntu-mono-derivative
==> Removing Font '/Users/ccgoo/Library/Fonts/Ubuntu Mono derivative Powerline Bold.ttf'
==> Backing Font 'Ubuntu Mono derivative Powerline.ttf' up to '/usr/local/Caskroom/font-ubuntu-mono-derivative-powe
==> Removing Font '/Users/ccgoo/Library/Fonts/Ubuntu Mono derivative Powerline.ttf'
==> Purging files for version latest of Cask font-ubuntu-mono-derivative-powerline
Error: Is a directory @ io_fread - /Users/ccgoo/Library/Caches/Homebrew/Cask/font-ubuntu-mono-derivative-powerline--svn

With some debug info

Error: Is a directory @ io_fread - /Users/ccgoo/Library/Caches/Homebrew/Cask/font-ubuntu-mono-derivative-powerline--svn
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/digest.rb:52:in `read'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/digest.rb:52:in `block in file'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/digest.rb:50:in `open'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/digest.rb:50:in `file'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/digest.rb:35:in `file'
/usr/local/Homebrew/Library/Homebrew/cask/cask.rb:141:in `block in new_download_sha'
/usr/local/Homebrew/Library/Homebrew/cask/cask.rb:141:in `instance_eval'
/usr/local/Homebrew/Library/Homebrew/cask/cask.rb:141:in `new_download_sha'
/usr/local/Homebrew/Library/Homebrew/cask/installer.rb:400:in `save_download_sha'
/usr/local/Homebrew/Library/Homebrew/cask/installer.rb:252:in `install_artifacts'
/usr/local/Homebrew/Library/Homebrew/cask/installer.rb:117:in `install'
/usr/local/Homebrew/Library/Homebrew/cask/cmd/install.rb:79:in `block in install_casks'
/usr/local/Homebrew/Library/Homebrew/cask/cmd/install.rb:78:in `each'
/usr/local/Homebrew/Library/Homebrew/cask/cmd/install.rb:78:in `install_casks'
/usr/local/Homebrew/Library/Homebrew/cmd/install.rb:179:in `install'
/usr/local/Homebrew/Library/Homebrew/brew.rb:110:in `<main>'

What did you expect to happen?

font-ubuntu-mono-derivative-powerline is installed successfully.

Step-by-step reproduction instructions (by running brew commands)

# Revert the commit b85f407e959d0420eaaaca25882335078aa70799

cd /usr/local/Homebrew
git checkout -b temp
git revert b85f407e959d0420eaaaca25882335078aa70799


# Install it again, this time it succeeds.

HOMEBREW_NO_AUTO_UPDATE=1 brew install font-ubuntu-mono-derivative-powerline


# The output

==> Cloning https://github.com/powerline/fonts/trunk/UbuntuMono
Updating /Users/ccgoo/Library/Caches/Homebrew/Cask/font-ubuntu-mono-derivative-powerline--svn
==> Checking out 53
Warning: No checksum defined for cask 'font-ubuntu-mono-derivative-powerline', skipping verification.
==> Installing Cask font-ubuntu-mono-derivative-powerline
==> Moving Font 'Ubuntu Mono derivative Powerline.ttf' to '/Users/ccgoo/Library/Fonts/Ubuntu Mono derivative Powerl
==> Moving Font 'Ubuntu Mono derivative Powerline Bold.ttf' to '/Users/ccgoo/Library/Fonts/Ubuntu Mono derivative P
==> Moving Font 'Ubuntu Mono derivative Powerline Bold Italic.ttf' to '/Users/ccgoo/Library/Fonts/Ubuntu Mono deriv
==> Moving Font 'Ubuntu Mono derivative Powerline Italic.ttf' to '/Users/ccgoo/Library/Fonts/Ubuntu Mono derivative
🍺  font-ubuntu-mono-derivative-powerline was successfully installed!

Other fonts, like font-roboto-mono-for-powerline, also failed to get installed.

[apainintheneck]

This is a bug that I unfortunately introduced recently related to version :latest casks that use the Subversion download strategy. A fix is being worked on and hopefully will be available soon.