rustup is outdated! To avoid broken installations, as soon as possible please run: brew upgrade Or, if you're OK with a less reliable fix: brew upgrade rustup

HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK is set: not checking for outdated dependents or dependents with broken linkage!

Treating docker as a formula. For the cask, use homebrew/cask/docker or specify the `--cask` flag.