undefined method 'latest?' for nilundefined method 'latest?' for nil

[cmahnke]

Output of brew config

brew config
HOMEBREW_VERSION: 6.0.17
ORIGIN: https://github.com/Homebrew/brew
HEAD: 4dacfe77a24dead72de749c0876028b77b99cd04
Last commit: vor 3 Stunden
Branch: stable
Core tap: N/A
Core cask tap: N/A
HOMEBREW_PREFIX: /home/linuxbrew/.linuxbrew
Homebrew Ruby: 4.0.6 => /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/portable-ruby/4.0.6/bin/ruby
CPU: octa-core 64-bit tigerlake
Clang: N/A
Git: 2.53.0 => /bin/git
Curl: 8.18.0 => /bin/curl
Kernel: Linux 7.0.0-28-generic x86_64 GNU/Linux
Landlock ABI: 8
OS: Ubuntu 26.04 LTS (resolute)
Host glibc: 2.43
Host libstdc++: 6.0.35
/usr/bin/gcc: 15.2.0
/usr/bin/ruby: N/A
glibc: N/A
gcc@13: N/A
gcc: N/A
xorg: N/A

Output of brew doctor

brew doctor
Your system is ready to brew.

Description of issue

brew install --cask visual-studio-code
==> Downloading Homebrew API data
✔︎ JSON API packages.x86_64_linux.jws.json                                                                                                                                                                         Downloaded   15.5MB/ 15.5MB
Error: undefined method 'latest?' for nil
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/cask/upgrade.rb:67:in 'block in Cask::Upgrade.outdated_casks'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/cask/upgrade.rb:56:in 'Array#select'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/cask/upgrade.rb:56:in 'Cask::Upgrade.outdated_casks'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/cmd/install.rb:238:in 'Homebrew::Cmd::InstallCmd#run'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/brew.rb:136:in '<main>'
Please report this issue:
  https://docs.brew.sh/Troubleshooting

My question, is just where to report that, is it related to the cask or the core? Certainly core, since is suspect that the cast would be run is isolation and error handling so this would result in a better error message.

[SMillerDev]

It's related to Homebrew/brew since it's an issue in the brew tool, not in any particular software.