I pushed a gem up to rubygems.org, and when I do a 'gem install (gem)' I get this error:
ERROR: While executing gem ... (NameError)
uninitialized constant Psych::Syck
I can do a 'gem build (gem).gemspec' to generate a local gem and then gem install (gem).gem and that installs fine. I can also put the gem into my Rails' app's Gemfile with a pointer to the Github repo and that will also work. I have tried installing the gem (from rubygems.org on multiple computers and they all get the same error.
I am out of ideas as to what can be causing the install to fail when done from rubygems.org but not when I generate it locally. I am using Jeweler to push the gem up to rubygems.org.
The specific error I got was: uninitialized constant Psych::Syck (NameError)
when doing bundle install.
This happened when installing simplecov (awesome code coverage tool) version 0.5.0. Working in Ubuntu 11.04 and using RVM.
Fixed the issue with gem update --system
This updates rubygems and produced the following output:
Updating rubygems-update
Fetching: rubygems-update-1.8.10.gem (100%)
Successfully installed rubygems-update-1.8.10
Installing RubyGems 1.8.10
RubyGems 1.8.10 installed
== 1.8.10 / 2011-08-25
RubyGems 1.8.10 contains a security fix that prevents malicious gems from
executing code when their specification is loaded. See
https://github.com/rubygems/rubygems/pull/165 for details.
* 5 bug fixes:
* RubyGems escapes strings in ruby-format specs using #dump instead of #to_s
and %q to prevent code injection. Issue #165 by Postmodern
* RubyGems attempt to activate the psych gem now to obtain bugfixes from
psych.
* Gem.dir has been restored to the front of Gem.path. Fixes remaining
problem with Issue #115
* Fixed Syck DefaultKey infecting ruby-format specifications.
* `gem uninstall a b` no longer stops if gem "a" is not installed.
------------------------------------------------------------------------------
RubyGems installed the following executables:
/home/baller/.rvm/rubies/ruby-1.9.2-p180/bin/gem
RubyGems system software updated
Seems to be a problem with Syck. See here:
Rails 3.1 on Ubuntu 11.04 via RVM - uninitialized constant Psych::Syck
Here:
http://rubyforge.org/tracker/?group_id=126&atid=575&func=detail&aid=29163
And fixes suggested here:
https://github.com/rubygems/rubygems/pull/57
The solution would be to run the below command in your terminal:
gem update --system
It is a bug in the system gem version that causes this issue. This worked for me.
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