Bug #3958: The Fiber instance method 'alive?' is not defined.
http://redmine.ruby-lang.org/issues/show/3958

Author: Lori Holden
Status: Open, Priority: Normal
Category: core, Target version: 1.9.2
ruby -v: ruby 1.9.2p0 (2010-08-18 revision 29036) [x86_64-darwin10.4.0]

The Fiber instance method 'alive?' is documented as existing, but is not actually defined.

ruby-1.9.2-p0 > Fiber.new.alive?
NoMethodError: undefined method `alive?' for #<Fiber:0x000001009fcaf8>
	from (irb):8
	from /Users/Lori/.rvm/rubies/ruby-1.9.2-p0/bin/irb:17:in `<main>'


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