- This is cleaner than vendoring a whole bunch of new gems and pinning `psych`.
- Thanks for the pointer, Bo!
- It doesn't work, though?
```
❯ brew tests --only=migrator --debug
Error: cannot load such file -- debug/debug.so
Warning: Removed Sorbet lines from backtrace!
Rerun with `--verbose` to see the original backtrace
/opt/homebrew/Library/Homebrew/vendor/portable-ruby/3.1.4/lib/ruby/gems/3.1.0/gems/debug-1.6.3/lib/debug/frame_info.rb:16:in `require'
/opt/homebrew/Library/Homebrew/vendor/portable-ruby/3.1.4/lib/ruby/gems/3.1.0/gems/debug-1.6.3/lib/debug/frame_info.rb:16:in `rescue in <module:DEBUGGER__>'
/opt/homebrew/Library/Homebrew/vendor/portable-ruby/3.1.4/lib/ruby/gems/3.1.0/gems/debug-1.6.3/lib/debug/frame_info.rb:13:in `<module:DEBUGGER__>'
/opt/homebrew/Library/Homebrew/vendor/portable-ruby/3.1.4/lib/ruby/gems/3.1.0/gems/debug-1.6.3/lib/debug/frame_info.rb:3:in `<top (required)>'
/opt/homebrew/Library/Homebrew/vendor/portable-ruby/3.1.4/lib/ruby/gems/3.1.0/gems/debug-1.6.3/lib/debug/session.rb:31:in `require_relative'
/opt/homebrew/Library/Homebrew/vendor/portable-ruby/3.1.4/lib/ruby/gems/3.1.0/gems/debug-1.6.3/lib/debug/session.rb:31:in `<top (required)>'
/opt/homebrew/Library/Homebrew/vendor/portable-ruby/3.1.4/lib/ruby/gems/3.1.0/gems/debug-1.6.3/lib/debug.rb:3:in `require_relative'
/opt/homebrew/Library/Homebrew/vendor/portable-ruby/3.1.4/lib/ruby/gems/3.1.0/gems/debug-1.6.3/lib/debug.rb:3:in `<top (required)>'
/opt/homebrew/Library/Homebrew/dev-cmd/tests.rb:48:in `require'
/opt/homebrew/Library/Homebrew/dev-cmd/tests.rb:48:in `run'
/opt/homebrew/Library/Homebrew/brew.rb:89:in `<main>'
```
- Byebug was introduced in [2020](https://github.com/Homebrew/brew/pull/7577) for hooking into tests for debugging.
- It does not work anymore in so far as it does not stop at breakpoints when following the instructions to trigger them in tests.
