Tap is (subtly?) broken on latest Homebrew

[chriskrycho]

Trying to run brew doctor, brew upgrade unison-language, brew cleanup, or brew untap unisonweb/unison (and maybe others, but definitely these) produces the following:

Error: Return value: Expected type String, got type BuildOptions with hash 3825908792469305078
Caller: /opt/homebrew/Library/Taps/unisonweb/homebrew-unison/unison-language.rb:30
Definition: /opt/homebrew/Library/Homebrew/formula.rb:3707 (Formula.build)
/opt/homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11851/lib/types/configuration.rb:296:in `call_validation_error_handler_default'
/opt/homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11851/lib/types/configuration.rb:303:in `call_validation_error_handler'
/opt/homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11851/lib/types/private/methods/call_validation.rb:322:in `report_error'
/opt/homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11851/lib/types/private/methods/call_validation_2_7.rb:63:in `block in create_validator_method_fast0'
/opt/homebrew/Library/Taps/unisonweb/homebrew-unison/unison-language.rb:30:in `<class:UnisonLanguage>'
/opt/homebrew/Library/Taps/unisonweb/homebrew-unison/unison-language.rb:1:in `block in load_formula'
/opt/homebrew/Library/Homebrew/formulary.rb:109:in `module_eval'
/opt/homebrew/Library/Homebrew/formulary.rb:109:in `block in load_formula'
/opt/homebrew/Library/Homebrew/formulary.rb:121:in `load_formula'
/opt/homebrew/Library/Homebrew/formulary.rb:152:in `load_formula_from_path'
/opt/homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11851/lib/types/private/methods/call_validation.rb:179:in `bind_call'
/opt/homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11851/lib/types/private/methods/call_validation.rb:179:in `validate_call_skip_block_type'
/opt/homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11851/lib/types/private/methods/call_validation.rb:121:in `block in create_validator_slow_skip_block_type'
/opt/homebrew/Library/Homebrew/formulary.rb:528:in `load_file'
/opt/homebrew/Library/Homebrew/formulary.rb:734:in `load_file'
/opt/homebrew/Library/Homebrew/formulary.rb:519:in `klass'
/opt/homebrew/Library/Homebrew/formulary.rb:514:in `get_formula'
/opt/homebrew/Library/Homebrew/formulary.rb:724:in `get_formula'
/opt/homebrew/Library/Homebrew/formulary.rb:927:in `factory'
/opt/homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11851/lib/types/private/methods/call_validation.rb:179:in `bind_call'
/opt/homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11851/lib/types/private/methods/call_validation.rb:179:in `validate_call_skip_block_type'
/opt/homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11851/lib/types/private/methods/call_validation.rb:121:in `block in create_validator_slow_skip_block_type'
/opt/homebrew/Library/Homebrew/formulary.rb:1013:in `from_keg'
/opt/homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11851/lib/types/private/methods/call_validation.rb:179:in `bind_call'
/opt/homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11851/lib/types/private/methods/call_validation.rb:179:in `validate_call_skip_block_type'
/opt/homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11851/lib/types/private/methods/call_validation.rb:121:in `block in create_validator_slow_skip_block_type'
/opt/homebrew/Library/Homebrew/formulary.rb:964:in `from_rack'
/opt/homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11851/lib/types/private/methods/call_validation.rb:179:in `bind_call'
/opt/homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11851/lib/types/private/methods/call_validation.rb:179:in `validate_call_skip_block_type'
/opt/homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11851/lib/types/private/methods/call_validation.rb:121:in `block in create_validator_slow_skip_block_type'
/opt/homebrew/Library/Homebrew/diagnostic.rb:734:in `block in check_for_unreadable_installed_formula'
/opt/homebrew/Library/Homebrew/diagnostic.rb:733:in `each'
/opt/homebrew/Library/Homebrew/diagnostic.rb:733:in `check_for_unreadable_installed_formula'
/opt/homebrew/Library/Homebrew/cmd/doctor.rb:59:in `block in run'
/opt/homebrew/Library/Homebrew/cmd/doctor.rb:52:in `each'
/opt/homebrew/Library/Homebrew/cmd/doctor.rb:52:in `run'
/opt/homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11851/lib/types/private/methods/call_validation.rb:282:in `bind_call'
/opt/homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11851/lib/types/private/methods/call_validation.rb:282:in `validate_call'
/opt/homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/sorbet-runtime-0.5.11851/lib/types/private/methods/_methods.rb:277:in `block in _on_method_added'
/opt/homebrew/Library/Homebrew/brew.rb:95:in `<main>'
If reporting this issue please do so at (not Homebrew/brew or Homebrew/homebrew-core):
  https://github.com/unisonweb/homebrew-unison/issues/new

I haven’t had any chance to dig deeper on the Ruby side (and likely will not), and it’s possible this is a my-machine thing… but I haven’t touched anything. 😬