[erikdw]

Uninstall deletes a keg's INSTALL_RECEIPT.json before remove_old_aliases reads it. The alias list is then empty, so the versioned opt sweep treats names such as ruby@4.0 as stale and deletes them when they point anywhere in that formula's rack, including the newer keg. MacVim (and anything else linked against Homebrew Ruby's install name) then aborts with Library not loaded: .../opt/ruby@4.0/lib/libruby.4.0.dylib.

uninstall now passes the alias list it read before removing the keg. A versioned opt alias that this keg owns is kept while its target still exists, and removed when that target was the keg just deleted. Stale names that are not aliases of the keg being removed, such as a leftover ffmpeg@8, are still deleted.

Fixes the failure discussed in https://github.com/orgs/Homebrew/discussions/7041 and macvim-dev/macvim#1697.

To reproduce:

brew install ruby macvim
# upgrade or reinstall ruby so cleanup uninstalls the previous keg
brew reinstall ruby
ls -l "$(brew --prefix)/opt/ruby@4.0"
vim --version

opt/ruby@4.0 is missing and vim aborts. brew unlink ruby && brew link ruby brings the alias back until the next Ruby upgrade.

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Drafted with Cursor Grok 4.7. I reviewed the diff and verified it with brew lgtm (brew typecheck, brew style --changed, and brew tests --only=keg).

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[MikeMcQuaid]

Thanks!

[erikdw]

Thanks for accepting my suggested fix, and improving it to be mergeable!