Ruby 1.9.1 is not working under rvm, mac os x

Question

I had rvm installed for several months and it has system (1.8.7) and installed (1.9.1) rubies listed. And both versions worked fine. Yesterday I tried to update 1.9.1 but after installation it wasn't working and system ruby gone from rvm list. I removed rvm, made clean install of rvm. But when I'm installing 1.9.1 via rvm it says:

info: Installation of ruby-1.9.1-p378 is complete.

info: Updating rubygems for /Users/nimf/.rvm/gems/ruby-1.9.1-p378@global

error: Error running '/Users/nimf/.rvm/rubies/ruby-1.9.1-p378/bin/gem update --system', please check /Users/nimf/.rvm/log/ruby-1.9.1-p378/rubygems.update*.log

info: Updating rubygems for /Users/nimf/.rvm/gems/ruby-1.9.1-p378

error: Error running '/Users/nimf/.rvm/rubies/ruby-1.9.1-p378/bin/gem update --system', please check /Users/nimf/.rvm/log/ruby-1.9.1-p378/rubygems.update*.log

In these log files:

[2010-08-17 09:17:31] /Users/nimf/.rvm/rubies/ruby-1.9.1-p378/bin/gem update --system
dyld: Library not loaded: /Users/nimf/.rvm/rubies/ruby-1.9.1-p378/lib/libruby.dylib
  Referenced from: /Users/nimf/.rvm/rubies/ruby-1.9.1-p378/bin/ruby
  Reason: Incompatible library version: ruby requires version 1.9.1 or later, but libruby.dylib provides version 1.8.0
/Users/nimf/.rvm/scripts/utility: line 180: 81885 Trace/BPT trap          /Users/nimf/.rvm/rubies/ruby-1.9.1-p378/bin/gem update --system
[2010-08-17 09:17:32] /Users/nimf/.rvm/rubies/ruby-1.9.1-p378/bin/gem update --system
dyld: Library not loaded: /Users/nimf/.rvm/rubies/ruby-1.9.1-p378/lib/libruby.dylib
  Referenced from: /Users/nimf/.rvm/rubies/ruby-1.9.1-p378/bin/ruby
  Reason: Incompatible library version: ruby requires version 1.9.1 or later, but libruby.dylib provides version 1.8.0
/Users/nimf/.rvm/scripts/utility: line 180: 81907 Trace/BPT trap          /Users/nimf/.rvm/rubies/ruby-1.9.1-p378/bin/gem update --system

And nor ruby, nor gems or irb working, giving same error:

$ ruby
dyld: Library not loaded: /Users/nimf/.rvm/rubies/ruby-1.9.1-p378/lib/libruby.dylib
  Referenced from: /Users/nimf/.rvm/rubies/ruby-1.9.1-p378/bin/ruby
  Reason: Incompatible library version: ruby requires version 1.9.1 or later, but libruby.dylib provides version 1.8.0
Trace/BPT trap
$ gem list
dyld: Library not loaded: /Users/nimf/.rvm/rubies/ruby-1.9.1-p378/lib/libruby.dylib
  Referenced from: /Users/nimf/.rvm/rubies/ruby-1.9.1-p378/bin/ruby
  Reason: Incompatible library version: ruby requires version 1.9.1 or later, but libruby.dylib provides version 1.8.0
Trace/BPT trap

ls -la /Users/nimf/.rvm/rubies/ruby-1.9.1-p378/lib/ gives:

total 17232
drwxr-xr-x  7 nimf  staff      238 17 авг 09:16 .
drwxr-xr-x  7 nimf  staff      238 17 авг 09:17 ..
-rw-r--r--  1 nimf  staff  6617504 17 авг 09:13 libruby-static.a
-rwxr-xr-x  1 nimf  staff  2193720 17 авг 09:13 libruby.1.9.1.dylib
lrwxrwxrwx  1 nimf  staff       19 17 авг 09:16 libruby.1.9.dylib -> libruby.1.9.1.dylib
lrwxrwxrwx  1 nimf  staff       19 17 авг 09:16 libruby.dylib -> libruby.1.9.1.dylib
drwxr-xr-x  6 nimf  staff      204 17 авг 09:17 ruby

I've also installed 1.8.7 and 1.9.2 under rvm and they work perfectly.

Answer 1

What version of RVM are you using? It's often useful to upgrade to RVM HEAD before trying to install any rubies. You can do this as described here, or as so:

$ rvm update --head

This might not fix the problem, but newer versions of RVM straight from git often include little workarounds to get rubies working on various platforms.