gistfile1.txt

jruby-1.6.6 :001 > lambda { raise "what?" }
 => #<Proc:0x9bbca@(irb):1 (lambda)> 
jruby-1.6.6 :002 > a = _
 => #<Proc:0x9bbca@(irb):1 (lambda)> 
jruby-1.6.6 :003 > puts

 => nil 
jruby-1.6.6 :004 > puts

 => nil 
jruby-1.6.6 :005 > puts

 => nil 
jruby-1.6.6 :006 > puts

 => nil 
jruby-1.6.6 :007 > a.call
RuntimeError: what?
	from (irb):1:in `evaluate'
	from org/jruby/RubyProc.java:258:in `call'
	from (irb):7:in `evaluate'
	from org/jruby/RubyKernel.java:1082:in `eval'
	from org/jruby/RubyKernel.java:1408:in `loop'
	from org/jruby/RubyKernel.java:1195:in `catch'
	from org/jruby/RubyKernel.java:1195:in `catch'
	from /home/arturas/.rvm/rubies/jruby-1.6.6/bin/irb:17:in `(root)'