NameError: undefined - have parsing rules for local variables changed in Ruby 2.1.2?

Question

I am getting NameError: undefined local variable or method with ruby 2.1.2

As observed in this question, expressions like:

bar if bar =          


        

Answer 1

Yes it changed in ruby 2.1.2

In 1.8.7, 1.9.3, 2.0.0 and even 2.1.1 I get 2 warnings and no errors:

2.0.0-p247 :007 > bar if bar = false
(irb):7: warning: found = in conditional, should be ==
 => nil 
2.0.0-p247 :008 > bar if bar = true
(irb):8: warning: found = in conditional, should be ==
 => true 

whereas in the 2.1.2 version you mention I get 2 warnings and 1 NameError error.

2.1.2 :001 > bar if bar = true
(irb):1: warning: found = in conditional, should be ==
NameError: undefined local variable or method `bar' for main:Object
        from (irb):1
        from /home/durrantm/.rvm/rubies/ruby-2.1.2/bin/irb:11:in `
'
2.1.2 :002 > bar if bar = false
(irb):2: warning: found = in conditional, should be ==
 => nil 

This is on my Ubuntu 14