Ruby 1.9.2 - warning: undefining `object_id' may cause serious problems

[owain68]

Looks like there are some issues with Ruby 1.9.2. Apparently much faster. Is there any work being done on it?

owain@../dev/ruleby/examples$ rvm 1.9.2-head@rete
owain@../dev/ruleby/examples$ ruby hello.rb 
/Users/owain/dev/ruleby/lib/dsl/ferrari.rb:303: warning: undefining `object_id' may cause serious problems
/Users/owain/dev/ruleby/lib/dsl/steel.rb:160: warning: undefining `object_id' may cause serious problems
Hello World
Goodbye world
owain@../dev/ruleby/examples$ rvm 1.8.7-head@rete
owain@../dev/ruleby/examples$ ruby hello.rb 
Hello World
Goodbye world
owain@../dev/ruleby/examples$