ruby 2.4 vs 2.3 wrt BigDecimal

bigdecimaltest.rb

#### RUBY 2.3 ####
2017-03-14 08:59:51 ⌚  |2.3.1| MBP1516W1R7sMBP in ~/Documents/projects → irb
[1] pry(main)> require 'bigdecimal'
=> true
[2] pry(main)> BigDecimal.new("")
=> #<BigDecimal:7fd10c18e518,'0.0',9(9)>
[3] pry(main)>


#### RUBY 2.4 ####
irb(main):003:0> require 'bigdecimal'
=> true
irb(main):004:0> BigDecimal.new("")
ArgumentError: invalid value for BigDecimal(): ""
        from (irb):4:in `initialize'
        from (irb):4:in `new'
        from (irb):4
        from /Users/jonathanwallace/.rbenv/versions/2.4.0/bin/irb:11:in `<main>'