Test different handling of return in lambda, proc and Proc.new

proc-return.rb

class X
  def initialize
    @l = lambda { return 123 }
    @p = proc { return 456 }
    @o = Proc.new { return 789 }
  end

  def l; @l.call end
  def p; @p.call end
  def o; @o.call end
end

x = X.new

begin
  puts "lambda"
  puts x.l
rescue Exception => e
  puts "ERROR: #{e}"
end

begin
  puts "proc"
  puts x.p
rescue Exception => e
  puts "ERROR: #{e}"
end

begin
  puts "Proc.new"
  puts x.o
rescue Exception => e
  puts "ERROR: #{e}"
end

run.txt

$ ruby -v
ruby 2.0.0p598 (2014-11-13) [x86_64-cygwin]
$ ruby proc-return.rb
lambda
123
proc
ERROR: unexpected return
Proc.new
ERROR: unexpected return