Getting definition is invalid: invalid 'sha256' value: nil during CI on Linux runner

[dronenb]

Output of brew config

HOMEBREW_VERSION: 4.4.23
ORIGIN: https://github.com/Homebrew/brew
HEAD: 64efed206deeb9c2304d9e5b5910dcbf0a509c15
Last commit: 7 days ago
Branch: stable
Core tap JSON: 09 Mar 14:27 UTC
HOMEBREW_PREFIX: /home/linuxbrew/.linuxbrew
HOMEBREW_CASK_OPTS: []
HOMEBREW_MAKE_JOBS: 2
HOMEBREW_SORBET_RUNTIME: set
Homebrew Ruby: 3.3.7 => /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/portable-ruby/3.3.7/bin/ruby
CPU: dual-core 64-bit unknown_0xf_0x6b
Clang: N/A
Git: 2.43.0 => /bin/git
Curl: 8.5.0 => /bin/curl
Kernel: Linux 6.8.0-55-generic x86_64 GNU/Linux
OS: Ubuntu 24.04.2 LTS (noble)
Host glibc: 2.39
/usr/bin/gcc: 13.3.0
/usr/bin/ruby: N/A
glibc: N/A
gcc@11: N/A
gcc: 14.2.0_1
xorg: N/A

Output of brew doctor

Your system is ready to brew.

Description of issue

I recently began seeing CI failures on my tap (generated with brew tap-new) for Casks that have multiple sha's for different architectures. The CI failures only occur on the Linux runner during the step brew audit --except=installed --tap=dronenb/tap. This did not used to be the case.

Example casks: https://github.com/dronenb/homebrew-tap/pull/52/files

I went ahead and installed brew in a Linux VM and got the same result, and enabled debug and verbose output:

brew audit --except=installed --tap=dronenb/tap --debug --verbose
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/bin/bundle clean
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/brew.rb (Formulary::FromAPILoader): loading binutils
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/brew.rb (Formulary::FromAPILoader): loading make
/usr/bin/env /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/shims/shared/git --version
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/brew.rb (Formulary::FromPathLoader): loading /home/linuxbrew/.linuxbrew/Homebrew/Library/Taps/dronenb/homebrew-tap/Formula/nmstatectl.rb
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/brew.rb (Cask::CaskLoader::FromPathLoader): loading /home/linuxbrew/.linuxbrew/Homebrew/Library/Taps/dronenb/homebrew-tap/Casks/cl-editor.rb
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/brew.rb (Cask::CaskLoader::FromPathLoader): loading /home/linuxbrew/.linuxbrew/Homebrew/Library/Taps/dronenb/homebrew-tap/Casks/companion-satellite.rb
Error: Cask 'companion-satellite' definition is invalid: invalid 'sha256' value: nil
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/cask/dsl.rb:350:in `block in sha256'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/cask/dsl.rb:166:in `set_unique_stanza'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/cask/dsl.rb:335:in `sha256'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11875/lib/types/private/methods/call_validation.rb:179:in `bind_call'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11875/lib/types/private/methods/call_validation.rb:179:in `validate_call_skip_block_type'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11875/lib/types/private/methods/call_validation.rb:121:in `block in create_validator_slow_skip_block_type'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Taps/dronenb/homebrew-tap/Casks/companion-satellite.rb:5:in `block in load'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/cask/cask.rb:116:in `instance_eval'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/cask/cask.rb:116:in `refresh'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/cask/cask.rb:109:in `config='
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/cask/cask.rb:88:in `initialize'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11875/lib/types/private/methods/call_validation.rb:179:in `bind_call'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11875/lib/types/private/methods/call_validation.rb:179:in `validate_call_skip_block_type'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11875/lib/types/private/methods/call_validation.rb:121:in `block in create_validator_slow_skip_block_type'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/cask/cask_loader.rb:48:in `new'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/cask/cask_loader.rb:48:in `cask'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11875/lib/types/private/methods/call_validation.rb:179:in `bind_call'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11875/lib/types/private/methods/call_validation.rb:179:in `validate_call_skip_block_type'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11875/lib/types/private/methods/call_validation.rb:121:in `block in create_validator_slow_skip_block_type'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/cask/cask_loader.rb:158:in `cask'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Taps/dronenb/homebrew-tap/Casks/companion-satellite.rb:1:in `load'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/cask/cask_loader.rb:143:in `instance_eval'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/cask/cask_loader.rb:143:in `load'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11875/lib/types/private/methods/call_validation.rb:179:in `bind_call'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11875/lib/types/private/methods/call_validation.rb:179:in `validate_call_skip_block_type'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11875/lib/types/private/methods/call_validation.rb:121:in `block in create_validator_slow_skip_block_type'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/cask/cask_loader.rb:557:in `load'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/dev-cmd/audit.rb:131:in `block (3 levels) in run'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/dev-cmd/audit.rb:131:in `map'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/dev-cmd/audit.rb:131:in `block (2 levels) in run'
<internal:kernel>:133:in `then'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/dev-cmd/audit.rb:128:in `block in run'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/extend/kernel.rb:547:in `with_env'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/api.rb:193:in `with_no_api_env'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11875/lib/types/private/methods/call_validation.rb:282:in `bind_call'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11875/lib/types/private/methods/call_validation.rb:282:in `validate_call'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11875/lib/types/private/methods/_methods.rb:277:in `block in _on_method_added'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/dev-cmd/audit.rb:126:in `run'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11875/lib/types/private/methods/call_validation.rb:282:in `bind_call'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11875/lib/types/private/methods/call_validation.rb:282:in `validate_call'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11875/lib/types/private/methods/_methods.rb:277:in `block in _on_method_added'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/brew.rb:95:in `<main>'

I don't think this is the expected behavior. I am happy to open an issue, but wanted to check here first to see if there was something obvious I was missing.

EDIT: hopefully it goes without saying, these casks are for macOS (I don't even think casks are supported on Linux), but CI triggers every time regardless of what was updated.

[dronenb]

I suspect the issue here is with recent changes to the following: https://github.com/Homebrew/brew/commits/master/Library/Homebrew/cask/dsl.rb

I ended up making an on_macos block and that fixed the issue: dronenb/homebrew-tap@12a472a

I suspect, though, this is a real bug.

[dronenb]

@SMillerDev - might want to take a look at this... seems to be a breaking change in the way SHA's are handled for casks on Linux...

[SMillerDev]

Shasums didn't work on Linux before this change, and casks on Linux were limited to just fonts. I'm not sure what use case broke for you