NameError: uninitialized constant Gem::SourceIndex

ruby-on-rails gem bundler

20,114

Solution 1

You need to update Bundler: gem update bundler

RubyGems release 2.0 seems to be the trigger for the error:

RubyGems 2.0 includes several new features and many breaking changes. Some of these changes will cause existing software to break. . . . If you are using bundler be sure to install a 1.3.0.prerelease version or newer. Older versions of bundler will not work with RubyGems 2.0.

Here are the issue details.

Solution 2

Run:

gem update --system 1.8.24

Sounds like there's something buggy with latest.

Solution 3

Have you tried updating your RubyGems?

gem update --system

Solution 4

Thanks!

Rails-7, ruby 3.1.2, had the same issue

solved it by gem update --system

Solution 5

gem update bundle && gem update --system

View more solutions

20,114

jamesfzhang

Updated on May 14, 2022

Comments

jamesfzhang almost 2 years

This error appears for a new rails app, with nothing modified, when visiting the homepage (after successfully running bundle install).

Here are the version numbers:

ruby: 1.9.3p392 (2013-02-22 revision 39386) [x86_64-darwin12.2.1]

rails: 3.2.12

rvm: 1.18.14

gem: 2.0.0

bundler: 1.3.0.pre.8

Calling which ruby returns /Users/J/.rvm/rubies/ruby-1.9.3-p392/bin/ruby, which seems fishy, right?
- Hans de Wit about 11 years
  
  Got the same error after upgrade from Ruby 1.9.3-p385 to 1.9.3-p392. Could it be a coincidence with some other change in my app?
- Daniel Ristic about 11 years
  
  This seems related
Codejoy about 11 years

same error and yes it says: Latest Version currently installed. Aborting. Still get error.
plasticide about 11 years

A colleague had updated to latest rubygems and was getting the same error as OP. I updated to latest to ensure that I got the same error. I did. I used the above answer to revert (to 1.8.25) and the error was resolved.
Carey Gregory about 11 years

You should copy the actual text of the answer here so your answer doesn't become worthless due to a broken link in the future.
Stuart M almost 11 years

Can you elaborate on how it will fix the issue?
littleyang almost 11 years

in your project root directory,using the commands,remember to use "bundle install"
Kadarach over 10 years

Thanks. Updated the answer.
ortonomy almost 2 years

this is the modern day real answer