Homebrew-core: Ruby errors when running brew commands.

[whyisjake]

Please follow the general troubleshooting steps first:

• [x] Ran brew update and retried your prior step?
• [x] Ran brew doctor, fixed as many issues as possible and retried your prior step?
• [x] If you're seeing permission errors tried running sudo chown -R $(whoami) $(brew --prefix)?
  

  Bug reports:

Brew is throwing Ruby errors.

➜  ~ brew
/Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- mach (LoadError)
    from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /usr/local/Library/Homebrew/extend/pathname.rb:2:in `<top (required)>'
    from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /usr/local/Library/Homebrew/global.rb:3:in `<top (required)>'
    from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /usr/local/Library/brew.rb:15:in `<main>'

This is likely something on my end, just throwing this out to see if there is a fix.

[ilovezfs]

What version of OS X is this?

[ilovezfs]

The fix is likely sudo /usr/bin/gem uninstall core_ext but I'm wondering if this is pre-release 10.11.5 since if I try to sudo /usr/bin/gem install core_ext I get

iMac-TMP:~ joe$ sudo /usr/bin/gem install core_ext
Password:
ERROR:  Error installing core_ext:
    core_ext requires Ruby version >= 2.2.2.

[whyisjake]

Currently at 10.11.4 (15E65) @ilovezfs.

[whyisjake]

➜  wired-wp git:(develop) ✗ sudo /usr/bin/gem uninstall core_ext
Password:
➜  wired-wp git:(develop) ✗ brew
/Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- mach (LoadError)
    from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /usr/local/Library/Homebrew/extend/pathname.rb:2:in `<top (required)>'
    from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /usr/local/Library/Homebrew/global.rb:3:in `<top (required)>'
    from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /usr/local/Library/brew.rb:15:in `<main>'
➜  wired-wp git:(develop) ✗ brew
/Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- mach (LoadError)
    from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /usr/local/Library/Homebrew/extend/pathname.rb:2:in `<top (required)>'
    from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /usr/local/Library/Homebrew/global.rb:3:in `<top (required)>'
    from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /usr/local/Library/brew.rb:15:in `<main>'
➜  wired-wp git:(develop) ✗ 

[ilovezfs]

I guess some other ruby besides /usr/bin/ruby installed that, then. Can you try just moving it out of the way?

sudo mv /Library/Ruby/Site/2.0.0/rubygems/core_ext ~/Desktop

[ilovezfs]

@whyisjake Is this now fixed?

[whyisjake]

Negative. This is response now:

➜  wired-wp git:(wired-video-updates) brew
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- mach (LoadError)
    from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /usr/local/Library/Homebrew/extend/pathname.rb:2:in `<top (required)>'
    from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /usr/local/Library/Homebrew/global.rb:3:in `<top (required)>'
    from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /usr/local/Library/brew.rb:15:in `<main>'

[whyisjake]

Dunno if this is related:

➜  wired-wp git:(wired-video-updates) ruby
You didn't really think you could install Ruby through npm, did you?

[ilovezfs]

Can you try this:

export HOMEBREW_DEVELOPER=1
export HOMEBREW_RUBY_PATH=/usr/bin/ruby

[whyisjake]

Same response... :(

[ilovezfs]

Can you come one IRC?
https://www.irccloud.com/#!/ircs://irc.freenode.net:6697/%23machomebrew
i.e., freenode #machomebrew

[whyisjake]

After some fantastic chat support over IRC, we found that I was pointing to the older repo:

https://gist.github.com/whyisjake/6938b0766e8fc035561fadc86aa93d9a
https://gist.github.com/whyisjake/3c9ef711f77ab5a2738b390afd636eb1

After some debugging, we have got everything updates, and cleaned up. Thanks again for your help @ilovezfs.

[ilovezfs]

@whyisjake you're welcome! :fireworks:

[p-somers]

I'm having this issue... how do you go about switching to the correct repo?

[MikeMcQuaid]

@p-somers Can you try to run brew update twice and then paste your brew config and brew doctor output here? Thanks!

[p-somers]

This is what happens when I run brew update:

/Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- mach (LoadError)
    from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /usr/local/Library/Homebrew/extend/pathname.rb:2:in `<top (required)>'
    from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /usr/local/Library/Homebrew/global.rb:3:in `<top (required)>'
    from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /usr/local/Library/brew.rb:16:in `<main>'

brew config and brew doctor both get the same result

[MikeMcQuaid]

@p-somers cd /usr/local; git fetch; git reset --hard origin/master; brew update

[p-somers]

That worked. Thanks!

[theDanielJLewis]

I had this same problem, but I had to add sudo to the git reset … and brew update parts. Then it worked.

[jakemcallister]

That worked. Cheers!