From: Robert Klemme <shortcutter@...>
Date: 2013-03-23T01:04:31+09:00
Subject: Re: Differences between Ruby 1.9.2 and 1.9.3

On Fri, Mar 22, 2013 at 3:33 PM, Dusan D. <lists@ruby-forum.com> wrote:
> Hi,
>
> The error I am seeing is this:
>
> /var/lib/gems/1.9.1/gems/linecache19-0.5.12/lib/tracelines19.rb:12:in
> `require':
> /var/lib/gems/1.9.1/gems/linecache19-0.5.12/lib/trace_nums19.so:
> undefined symbol: ruby_current_thread -
> /var/lib/gems/1.9.1/gems/linecache19-0.5.12/lib/trace_nums19.so
> (LoadError)
>
> I guess gems are OK, I updated Ubuntu to latest version of everything
> using "apt-get upgrade"

To elaborate what Hans said: you also need "sudo gem update" (or
without "sudo" depending on where you store your gems) followed by
"sudo gem clean".

Cheers

robert

-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/