[ruby-core:53795] Meaningless nil range

Hi,

I came accross a bizarre behaviour when porting my code from 1.8.7 to 2.0.0.

Here are irb sessions:

 >> RUBY_VERSION
=> "1.8.7"
 >> nil..nil
ArgumentError: bad value for range
     from (irb):2

2.0.0p0 :002 > range = nil..nil
  => nil..nil
2.0.0p0 :003 > range.include? nil
TypeError: can't iterate from NilClass
     from (irb):3:in `each'
     from (irb):3:in `include?'
     from (irb):3:in `include?'
     from (irb):3
     from /Users/phi/.rvm/rubies/ruby-2.0.0-p0/bin/irb:16:in `<main>'

So a range of nil..nil throws an error in 1.8.7 but does not in 2.0.0. 
While it is accepted in 2.0.0, nothing meaningful may be done with it.
I'd highly prefer the 1.8.7 behaviour of throwing an error when 
constructing such a range.

What are your opinions?

Regards,

Pascal