Ruby

Using this example: https://github.com/ruby/ruby/blob/ruby_2_2/lib/uri/mailto.rb#L257-L259

Ruby 2.2.0:

$ ruby -v ruby 2.2.0p0 (2014-12-25 revision 49005) [x86_64-linux] $ ruby -ruri -e 'puts URI.parse("mailto:ruby-list@ruby-lang.org?Subject=subscribe&cc=myaddr").to_mailtext' /home/dm/.rbenv/versions/2.2.0/lib/ruby/2.2.0/uri/mailto.rb:262:in `to_mailtext': undefined method `unescape' for #<URI::RFC3986_Parser:0x007f11ec3c1c20> (NoMethodError)	from -e:1:in `<main>' 

Compare to Ruby 2.1.5:

$ ruby -v ruby 2.1.5p273 (2014-11-13 revision 48405) [x86_64-linux] $ ruby -ruri -e 'puts URI.parse("mailto:ruby-list@ruby-lang.org?Subject=subscribe&cc=myaddr").to_mailtext' To: ruby-list@ruby-lang.org Subject: subscribe Cc: myaddr 

Ruby trunk:

$ ruby -v ruby 2.3.0dev (2015-01-23 trunk 49388) [x86_64-linux] $ ruby -ruri -e 'puts URI.parse("mailto:ruby-list@ruby-lang.org?Subject=subscribe&cc=myaddr").to_mailtext' /home/dm/.rbenv/versions/2.3.0-dev/lib/ruby/2.3.0/uri/mailto.rb:266:in `to_mailtext': undefined method `unescape' for #<URI::RFC3986_Parser:0x007f1585094e70> (NoMethodError)	from -e:1:in `<main>'