rvm gemset copy error

I'm working out the details to move from ruby-1.8.7 to ruby-1.9.2 with rvm and I'm hitting an issue with copying gems from one ruby to another and I wanted to see if anyone knew what the deal is and why it my be erring.

I already have 1.9.2 installed, but running rvm gemset copy is throwing an error.

[22:11][adamstacoviak:~]$ rvm gemset copy ruby-1.8.7-p249 ruby-1.9.2-p180
Copying gemset from ruby-1.8.7-p249 to ruby-1.9.2-p180
cp: cannot overwrite directory /Users/adamstacoviak/.rvm/gems/ruby-1.9.2-p180/cache with non-directory /Users/a开发者_Go百科damstacoviak/.rvm/gems/ruby-1.8.7-p249/cache
Making gemset for ruby-1.9.2-p180 pristine.
ERROR: Error running 'rvm gemset pristine' under ,
please read /Users/adamstacoviak/.rvm/log/ruby-1.8.7-p249/gemset.pristine.log

... and here's the contents of the log file. I did update bundler as well since I saw that it mentioned bundler-1.0.12 was not found. Updating to bundler 1.0.12 didn't do the trick.

[2011-04-12 22:09:54] rvm gemset pristine # under ruby-1.9.2-p180
ERROR:  While executing gem ... (NameError)
    uninitialized constant Gem::RemoteFetcher
Restoring gem(s) to pristine condition...
Cached gem for bundler-1.0.12 not found, attempting to fetch...
[2011-04-12 22:14:26] rvm gemset pristine # under ruby-1.9.2-p180
ERROR:  While executing gem ... (NameError)
    uninitialized constant Gem::RemoteFetcher
Restoring gem(s) to pristine condition...
Cached gem for bundler-1.0.12 not found, attempting to fetch...

Any thoughts on why rvm gemset copy is erring?

---

RVM is your friend and already knows how to upgrade your versions:

rvm help upgrade

Usage:

  rvm upgrade [source ruby] [destination ruby]

Description:

  Upgrades the specified (already installed) source ruby given to the
  given destination ruby version. Will migrate gemsets, wrappers, aliases
  and environment files.

  The process will prompt you at each stage - if the versions look incorrect,
  please cancel and perform it manually.


Examples:

  $ rvm upgrade 1.9.2-p136 1.9.2-p180

  $ rvm upgrade ree-2011.01 ree-2011-02

Type rvm help ugrade at the command line.

---

Simply add the line to the file /usr/bin/gem (may be different on a mac) require 'rubygems/gem_runner' after require 'rubygems'

Found this over here

---

You could just use cp:

cp -R ~/.rvm/gems/ruby-1.8.7-p249/* ~/.rvm/gems/ruby-1.9.2-p180/