rbenv rehash error in conjunction with Ruby 2.3.0

[kaikuchn]

Hi,

I just updated everything through homebrew to install Ruby 2.3.0 and noticed that rbenv rehash throws this error:

/Users/kaikuchn/.rbenv/versions/2.3.0/lib/ruby/2.3.0/ostruct.rb:176:in `respond_to_missing?': undefined method `key?' for nil:NilClass (NoMethodError)
  from /Users/kaikuchn/.rbenv/versions/2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:381:in `respond_to?'
  from /Users/kaikuchn/.rbenv/versions/2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:381:in `init_with'
  [ ... ]
  from /Users/kaikuchn/.rbenv/versions/2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:32:in `accept'
  from /Users/kaikuchn/.rbenv/versions/2.3.0/lib/ruby/2.3.0/psych/nodes/node.rb:38:in `to_ruby'
  from /Users/kaikuchn/.rbenv/versions/2.3.0/lib/ruby/2.3.0/psych.rb:253:in `load'
  from /Users/kaikuchn/.rbenv/plugins/bundler/etc/rbenv.d/bundler/rehash.rb:267:in `block in build_ruby_profiles'
  from /Users/kaikuchn/.rbenv/plugins/bundler/etc/rbenv.d/bundler/rehash.rb:266:in `open'
  from /Users/kaikuchn/.rbenv/plugins/bundler/etc/rbenv.d/bundler/rehash.rb:266:in `open'
  from /Users/kaikuchn/.rbenv/plugins/bundler/etc/rbenv.d/bundler/rehash.rb:266:in `build_ruby_profiles'
  from /Users/kaikuchn/.rbenv/plugins/bundler/etc/rbenv.d/bundler/rehash.rb:455:in `<main>'

rbenv version is 1.0.0 and ruby-build version 20151225

It looks like Ruby 2.3.0 has trouble loading OpenStructs from the ruby_profiles.yml file?
The implementation of OpenStruct changed, it now has a #respond_to_missing? method which references @table. That instance variable seems to be nil and causes the error.

As I now realize, this isn't a fault with rbenv, but rather with Psych.. Check this out:

irb(main):061:0> yaml = Psych.dump(OpenStruct.new(ruby_version: [2, 3, 0]))
=> "--- !ruby/object:OpenStruct\ntable:\n  :ruby_version:\n  - 2\n  - 3\n  - 0\n"
irb(main):062:0> Psych.load(yaml)
NoMethodError: undefined method `key?' for nil:NilClass
    from /Users/kkuchenbecker/.rbenv/versions/2.3.0/lib/ruby/2.3.0/ostruct.rb:176:in `respond_to_missing?'
    from /Users/kkuchenbecker/.rbenv/versions/2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:381:in `respond_to?'
    [ ... ]
    from /Users/kkuchenbecker/.rbenv/versions/2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:32:in `accept'
    from /Users/kkuchenbecker/.rbenv/versions/2.3.0/lib/ruby/2.3.0/psych/nodes/node.rb:38:in `to_ruby'
    from /Users/kkuchenbecker/.rbenv/versions/2.3.0/lib/ruby/2.3.0/psych.rb:253:in `load'
    from (irb):62
    from /Users/kkuchenbecker/.rbenv/versions/2.3.0/bin/irb:11:in `<main>'

I'll create this issue anyway since people are likely to report this here..

Edit: I've now reported this issue https://bugs.ruby-lang.org/issues/11884

[mislav]

Thanks for reporting, but rbenv doesn't have any code in Ruby, and thus can't generate Ruby stack traces. It's all bash script.

Your stack trace comes from rbenv-bundler plugin, which is a known culprit for many kinds of bugs. You should uninstall it, rm -rrbenv root/shims, and try rehash again.

[kaikuchn]

Oh! Thanks for pointing that out.
I removed the plugin and I'm not missing it (nor the stack trace it produced :smile: ).

I'll then close this issue since it has nothing to do with rbenv. Thank you for your quick response and your awesome work!

[adamgeorgeson]

Just incase this issues comes up in search results for people having the same/similar issue, I also had this but had been installed through homebrew - stack trace included /usr/local/Cellar/rbenv-bundler/0.99/etc/rbenv.d/bundler/rehash.rb:267:in 'block in build_ruby_profiles' opposed to within .rbenv.

• brew uninstall rbenv-bundler
• rm -rrbenv root/shims
• rbenv rehash

[dannysmith]

Ended up here via google. Thanks.

If you've got rbenv-bundler installed and don't want to remove it, you can switch it off with rbenv bundler off.

[tannerhodges]

@dannysmith Thanks for the rbenv bundler off tip.

For me, the fix was:

brew update && brew upgrade
rm -rf `rbenv root`/shims
rbenv bundler off
rbenv rehash