Load error when running rails console

Question

I am using rails 4.1 and ruby 2.1.1

Everything works, but when I run rails console I get this error

> rails console
Loading development environment (Rails 4.1.0)
load error: /home/andreas/.rvm/rubies/ruby-2.1.1/.irbrc
NoMethodError: undefined method `split' for nil:NilClass
    /home/andreas/.rvm/scripts/irbrc.rb:41:in `<top (required)>'

After the error the console opens and can be used.

Here's the 41th line and surroundings in the .irbrc file.

39 # Calculate the ruby string.
40 rvm_ruby_string = ENV["rvm_ruby_string"] ||
41 (ENV['GEM_HOME'] && ENV['GEM_HOME'].split(/\//).last.split(/@/).first) ||
42 ("#{RUBY_VERSION}-p#{RUBY_PATCHLEVEL}" rescue nil) ||
43 (RUBY_DESCRIPTION.split(" ")[1].sub('p', '-p') rescue nil ) ||
44 (`ruby -v` || '').split(" ")[1].sub('p', '-p')

I get these results when testing in the console

irb(main):008:0> ENV['GEM_HOME']
=> ""
irb(main):009:0> ENV['GEM_HOME'].split(/\//).last
=> nil

If I run irb outside the rails application, I get

2.1.1 :001 > ENV['GEM_HOME']
 => "/home/andreas/.rvm/gems/ruby-2.1.1" 
2.1.1 :002 > ENV['GEM_HOME'].split(/\//).last
 => "ruby-2.1.1"

Do you know why the environment variable is blank in the rails application?

Can you give us more details about your stack? I take you're running on a flavour of Linux -- how is it setup? — Richard Peck
– Richard Peck, Commented Apr 22, 2014 at 10:31
I've seen this too - running bundle exec rails c produced the error but not bin/rails c. I've not had a chance to dig further. Perhaps bundler messing with the gem environment in a way that confuses rvm? — Frederick Cheung
– Frederick Cheung, Commented Apr 22, 2014 at 10:41
@RichPeck It's newly updated ubuntu 14.04, rails 4.1 and ruby 2.1.1. All was updated from the previous version. — Andreas Lyngstad
– Andreas Lyngstad, Commented Apr 22, 2014 at 12:54
@FrederickCheung I get the error with all possible command (bin/rails , bundle exec rails c and rails c). I am guessing that rails GEM_HOME can be different than the global GEM_HOME, and when rails c is run the rails GEM_HOME is in use. — Andreas Lyngstad
– Andreas Lyngstad, Commented Apr 22, 2014 at 13:06
This is probably because something happened with your rvm environment. Something just happened with mine so I am reinstalling rvm since I had 10GB of out of date ruby versions on there anyway. — Dex
– Dex, Commented Mar 5, 2015 at 6:08

DazBaldwin · Accepted Answer · 2014-10-15 13:32:52Z

If you encounter this problem you should restart you computer. If that does not fix it read on.

The bin/spring file sets ENV["GEM_HOME"] to a blank string

bin/spring

11 ENV["GEM_PATH"] = ([Bundler.bundle_path.to_s] + Gem.path).join(File::PATH_SEPARATOR)
12 ENV["GEM_HOME"] = ""
13 Gem.paths = ENV

This crashes when running rails console because in line 41

ENV['GEM_HOME'].split(/\//).last

returns nil if ENV['GEM_HOME'] is blank

~/.rvm/rubies/ruby-2.1.1/.irbrc

39 # Calculate the ruby string.
40 rvm_ruby_string = ENV["rvm_ruby_string"] ||
41 (ENV['GEM_HOME'] && ENV['GEM_HOME'].split(/\//).last.split(/@/).first) ||
42 ("#{RUBY_VERSION}-p#{RUBY_PATCHLEVEL}" rescue nil) ||
43 (RUBY_DESCRIPTION.split(" ")[1].sub('p', '-p') rescue nil ) ||
44 (`ruby -v` || '').split(" ")[1].sub('p', '-p')

rvm uses the string to set the prompt message in the console. If you change line 12 in bin/spring to

ENV["GEM_HOME"] = "Spring is great!"

You get this nice prompt

bin/rails c
Loading development environment (Rails 4.1.0)
Spring is great! :001 >

I don't really understand why ENV["GEM_HOME"] is set to a blank string. So, I just change this to get rid of the error. I have posted an issue on the spring github page.

Beware!

Any changes to the bin/spring file gets overwritten when you run the spring binstub command

Weihang Jian · Accepted Answer · 2014-05-10 18:22:46Z

2

I just encountered the same problem, and I solved it by spring stop. I think there is no need to restart the computer. What you should do is to restart spring.

answered May 10, 2014 at 18:22

Weihang Jian

8,9256 gold badges52 silver badges60 bronze badges

1 Comment

Andreas Lyngstad Over a year ago

In my case I had to restart the computer I tried spring stop, but I still had the error

Furkan Ayhan · Accepted Answer · 2014-09-13 10:39:23Z

0

These steps solved my problem:

find the current ruby version

ruby -v

example:

ruby 2.1.2p95 (2014-05-08 revision 45877) [x86_64-darwin13.0]

remove this version

rvm remove 2.1.2

install again

rvm install 2.1.2

answered Sep 13, 2014 at 10:39

Furkan Ayhan

1,3799 silver badges16 bronze badges

Comments

Ryenski · Accepted Answer · 2015-05-15 16:23:42Z

0

You may just need to specify a gemset with

rvm gemset use YourGemset

I find it's a good idea to use a separate gemset for each project. Then place the name of that project's gemset in a file named .ruby-gemset in the root of your project. See https://rvm.io/workflow/projects for more info.

answered May 15, 2015 at 16:23

Ryenski

9,7124 gold badges46 silver badges49 bronze badges

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