Error: cannot load such file -- abstract_command

[bgrzesiak-fetch]

This change seems to be breaking CI for us. To me, it looks like a circular dependency, though I'm not sure if that's actually causing the failure.

Circular dependency:

• brew defines abstract_command
• brew loads homebrew-bundle
• homebrew-bundle attempts to reach back into brew for abstract_command

Actual error I'm getting:

$ brew "bundle"
==> Tapping homebrew/bundle
Cloning into '/opt/homebrew/Library/Taps/homebrew/homebrew-bundle'...
Tapped 1 command (109 files, 2.3MB).
Error: cannot load such file -- abstract_command
/opt/homebrew/Library/Taps/homebrew/homebrew-bundle/cmd/bundle.rb:3:in `require'
/opt/homebrew/Library/Taps/homebrew/homebrew-bundle/cmd/bundle.rb:3:in `<top (required)>'
/opt/homebrew/Library/Homebrew/extend/kernel.rb:10:in `require'
/opt/homebrew/Library/Homebrew/extend/kernel.rb:10:in `require?'
/opt/homebrew/Library/Homebrew/commands.rb:78:in `external_ruby_v2_cmd_path'
/opt/homebrew/Library/Homebrew/brew.rb:85:in `<main>'
Can't install with Brewfile:  exit status 1
Can't install with Brewfile:  exit status 1

We're using bitrise for CI, and here's the brew-install step that's failing. It hasn't been touched in 10 months.

[SMillerDev]

What does your brew config say?

[MikeMcQuaid]

#1335 was just merged which will tell you the solution: you need to run brew update.