Bug in pure Ruby punycode implementation

[dentarg]

[32] pry(main)> Addressable::IDNA.to_unicode("xn--...-")
NoMethodError: undefined method `size' for nil:NilClass

I think it's blowing up on this line:

addressable/lib/addressable/idna/pure.rb

Line 505 in 29e26cc

if ACE_MAX_LENGTH * 2 < punycode.size

Use case, I'm trying to parse http://xn--...-/

[21] pry(main)> Addressable::URI.heuristic_parse("http://xn--...-/").display_uri
NoMethodError: undefined method `size' for nil:NilClass

The native solution works fine:

[1] pry(main)> require "addressable/idna/native"
=> false
[2] pry(main)> Addressable::IDNA.to_unicode("xn--...-")
=> "xn--...-"

[sporkmonger]

Fixed in cf8cc7d.