Warning: Calling brew list to only list formulae is deprecated! Use brew list --formula instead.

[mcandre]

Homebrew has deprecated the old CLI convention. Please make sure to supply the --formula flag where appropriate.

[pkuczynski]

I am on Big Sur with brew 2.5.11 and it does not display any warning when I call brew list. Can you please elaborate which command displays deprecation notice for you?

[hectorbus]

Trying to install ruby version 2.6.5 I got the same message.

Warning: Calling 'brew list' to only list formulae is deprecated! Use 'brew list --formula' instead.

[pkuczynski]

Which version of macOS and brew do you have?

[hectorbus]

Which version of macOS and brew do you have?

Homebrew 2.5.11
macOS Mojave 10.14.6

[Kevincible]

Same here.
macOS Big Sur Version 11.0.1

$ brew -v
Homebrew 2.5.11
Homebrew/homebrew-core (git revision ee173; last commit 2020-11-24)
Homebrew/homebrew-cask (git revision c70c3; last commit 2020-11-24)

$ rvm -v
rvm 1.29.10 (latest) by Michal Papis, Piotr Kuczynski, Wayne E. Seguin [https://rvm.io]

$ rvm reinstall 2.7
ruby-2.7.0 - #removing src/ruby-2.7.0 - please wait
ruby-2.7.0 - #removing rubies/ruby-2.7.0 - please wait
Searching for binary rubies, this might take some time.
No binary rubies available for: osx/11.0/x86_64/ruby-2.7.0.
Continuing with compilation. Please read 'rvm help mount' to get more information on binary rubies.
Checking requirements for osx.
Warning: Calling `brew list` to only list formulae is deprecated! Use `brew list --formula` instead.
Warning: Calling `brew list` to only list formulae is deprecated! Use `brew list --formula` instead.
Warning: Calling `brew list` to only list formulae is deprecated! Use `brew list --formula` instead.
Warning: Calling `brew list` to only list formulae is deprecated! Use `brew list --formula` instead.
Warning: Calling `brew list` to only list formulae is deprecated! Use `brew list --formula` instead.
Warning: Calling `brew list` to only list formulae is deprecated! Use `brew list --formula` instead.
Warning: Calling `brew list` to only list formulae is deprecated! Use `brew list --formula` instead.
Warning: Calling `brew list` to only list formulae is deprecated! Use `brew list --formula` instead.
Warning: Calling `brew list` to only list formulae is deprecated! Use `brew list --formula` instead.
Warning: Calling `brew list` to only list formulae is deprecated! Use `brew list --formula` instead.
Warning: Calling `brew list` to only list formulae is deprecated! Use `brew list --formula` instead.
Warning: Calling `brew list` to only list formulae is deprecated! Use `brew list --formula` instead.
Certificates bundle '/usr/local/etc/openssl@1.1/cert.pem' is already up to date.
Requirements installation successful.
Installing Ruby from source to: /Users/username/.rvm/rubies/ruby-2.7.0, this may take a while depending on your cpu(s)...
ruby-2.7.0 - #downloading ruby-2.7.0, this may take a while depending on your connection...
ruby-2.7.0 - #extracting ruby-2.7.0 to /Users/username/.rvm/src/ruby-2.7.0 - please wait
ruby-2.7.0 - #configuring - please wait
ruby-2.7.0 - #post-configuration - please wait
ruby-2.7.0 - #compiling - please wait
....

[Kevincible]

However directly calling brew list won't emit the warning

[dshevtsov]

Same on macOS Catalina 10.15.7 with Homebrew 2.5.11 when running

$ \curl -sSL https://get.rvm.io | bash -s stable --ruby

[havenwood]

A fix is being worked on in #4995.

[pkuczynski]

Fixed