Homebrew-core: Elixir install throws an error

[bantl23]

Please always follow these steps:

• [x] Confirmed this is a problem with brew installing one, specific formula (not cask) and not every time you run brew? If it's a general brew problem please file this issue at https://github.com/Homebrew/brew/issues/new. If it's a brew cask problem please file this issue at https://github.com/Homebrew/caskroom/homebrew-cask/new
• [x] Ran brew update and retried your prior step?
• [x] Ran brew doctor, fixed all issues and retried your prior step?
• [x] Ran brew gist-logs <formula> (where <formula> is the name of the formula that failed) and included the output link?
• [x] If brew gist-logs didn't work: ran brew config and brew doctor and included their output with your issue?

Please note we will close your issue without comment if you delete or do not fill out the issue checklist and provide ALL the requested information.

To help us debug your issue please explain:

• What you were trying to do (and why)
• What happened (include command output)
• What you expected to happen
• Step-by-step reproduction instructions (by running brew install commands)

New Formulae

To get a new formula into Homebrew please file a Pull Request.

Outputs

• Step A: brew doctor
Your system is ready to brew.
• Step B: brew install elixir

Updating Homebrew...
==> Auto-updated Homebrew!
Updated 2 taps (caskroom/cask, homebrew/core).
==> Updated Formulae
knot-resolver                                                                         libphonenumber

Error: undefined method `exitstatus' for nil:NilClass
Please report this bug:
  http://docs.brew.sh/Troubleshooting.html
/usr/local/Homebrew/Library/Taps/homebrew/homebrew-core/Formula/elixir.rb:9:in `block in <class:Erlang18Requirement>'
/usr/local/Homebrew/Library/Homebrew/requirement.rb:58:in `instance_eval'
/usr/local/Homebrew/Library/Homebrew/requirement.rb:58:in `block in satisfied?'
/usr/local/Homebrew/Library/Homebrew/requirement.rb:198:in `block in yielder'
/usr/local/Homebrew/Library/Homebrew/extend/ENV.rb:25:in `with_build_environment'
/usr/local/Homebrew/Library/Homebrew/requirement.rb:198:in `yielder'
/usr/local/Homebrew/Library/Homebrew/requirement.rb:58:in `satisfied?'
/usr/local/Homebrew/Library/Homebrew/formula_installer.rb:412:in `install_requirement_formula?'
/usr/local/Homebrew/Library/Homebrew/formula_installer.rb:432:in `block in expand_requirements'
/usr/local/Homebrew/Library/Homebrew/requirement.rb:230:in `block in prune?'
/usr/local/Homebrew/Library/Homebrew/requirement.rb:228:in `catch'
/usr/local/Homebrew/Library/Homebrew/requirement.rb:228:in `prune?'
/usr/local/Homebrew/Library/Homebrew/requirement.rb:219:in `block (2 levels) in expand'
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/set.rb:232:in `each_key'
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/set.rb:232:in `each'
/usr/local/Homebrew/Library/Homebrew/dependencies.rb:68:in `each'
/usr/local/Homebrew/Library/Homebrew/requirement.rb:218:in `block in expand'
/usr/local/Homebrew/Library/Homebrew/requirement.rb:217:in `each'
/usr/local/Homebrew/Library/Homebrew/requirement.rb:217:in `expand'
/usr/local/Homebrew/Library/Homebrew/formula.rb:1534:in `recursive_requirements'
/usr/local/Homebrew/Library/Homebrew/formula_installer.rb:425:in `expand_requirements'
/usr/local/Homebrew/Library/Homebrew/formula_installer.rb:367:in `compute_dependencies'
/usr/local/Homebrew/Library/Homebrew/formula_installer.rb:134:in `verify_deps_exist'
/usr/local/Homebrew/Library/Homebrew/formula_installer.rb:127:in `prelude'
/usr/local/Homebrew/Library/Homebrew/cmd/install.rb:337:in `install_formula'
/usr/local/Homebrew/Library/Homebrew/cmd/install.rb:223:in `block in install'
/usr/local/Homebrew/Library/Homebrew/cmd/install.rb:221:in `each'
/usr/local/Homebrew/Library/Homebrew/cmd/install.rb:221:in `install'
/usr/local/Homebrew/Library/Homebrew/brew.rb:100:in `<main>'

• Step C: brew doctor
Your system is ready to brew.

• Step D: brew gist-logs elixir
Error: No logs.

• Step E: brew config

HOMEBREW_VERSION: 1.2.2
ORIGIN: https://github.com/Homebrew/brew.git
HEAD: 54e01d76db34a3a649c79b189873bfd0a52dbc9f
Last commit: 3 weeks ago
Core tap ORIGIN: https://github.com/Homebrew/homebrew-core
Core tap HEAD: 918902fd25a44b71bcbfce4baef48028e0261e17
Core tap last commit: 11 minutes ago
HOMEBREW_PREFIX: /usr/local
HOMEBREW_REPOSITORY: /usr/local/Homebrew
HOMEBREW_CELLAR: /usr/local/Cellar
HOMEBREW_BOTTLE_DOMAIN: https://homebrew.bintray.com
CPU: octa-core 64-bit ivybridge
Homebrew Ruby: 2.0.0-p648
Clang: 8.0 build 800
Git: 2.13.1 => /usr/local/bin/git
Perl: /usr/local/bin/perl => /usr/local/Cellar/perl/5.24.1/bin/perl
Python: /usr/local/bin/python => /usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/bin/python2.7
Ruby: /usr/local/bin/ruby => /usr/local/Cellar/ruby/2.4.1_1/bin/ruby
Java: 1.8.0_60, 1.8.0_45, 1.8.0_31, 1.7.0_67, 1.7.0_17
macOS: 10.11.6-x86_64
Xcode: 8.2.1
CLT: 8.2.0.0.1.1480973914
X11: N/A

• Step F: brew doctor
Your system is ready to brew.

[JCount]

I believe this is because your HOMEBREW_VERSION is out of date. You have 1.2.2 while the most recent version is 1.2.3.

Can you try running brew update --force --verbose, and if that doesn't update you to the next tag (1.2.3) can you provide the output that you got?

[bantl23]

That fixed it, thanks! However, I thought brew automatically updated itself with brew update.

[JCount]

@bantl23 It should, but occasionally individuals have sporadic issues when upgrading to new tags. I am glad this is fixed for you.