FloatDomainError: Infinity when updating PostgreSQL range with infinity (ActiveRecord 4.0.x) and PostgreSQL (9.2)

error

  1) Error:
RangeTest#test:
FloatDomainError: Infinity
    /home/dave/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.1/lib/active_record/attribute_methods/dirty.rb:97:in `to_r'
    /home/dave/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.1/lib/active_record/attribute_methods/dirty.rb:97:in `=='
    /home/dave/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.1/lib/active_record/attribute_methods/dirty.rb:97:in `=='
    /home/dave/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.1/lib/active_record/attribute_methods/dirty.rb:97:in `!='
    /home/dave/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.1/lib/active_record/attribute_methods/dirty.rb:97:in `_field_changed?'
    /home/dave/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.1/lib/active_record/attribute_methods/dirty.rb:66:in `write_attribute'
    /home/dave/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.1/lib/active_record/attribute_methods/write.rb:21:in `__temp__e657d6f52716e67656='
    /home/dave/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-4.0.1/lib/active_record/persistence.rb:218:in `update_attribute'
    test.rb:42:in `test'

postgresql_ranges_infinity_issue.rb

gem 'activerecord', '5.0.1'
require 'active_record'
require 'minitest/autorun'
require 'logger'

# Be sure to: $ createdb postgresql_ranges_infinity_issue

ActiveRecord::Base.establish_connection(adapter: 'postgresql', database: 'postgresql_ranges_infinity_issue')
ActiveRecord::Base.logger = Logger.new(STDOUT)

class CreatePostgressqlRanges < ActiveRecord::Migration
  def change
    create_table :postgresql_ranges do |t|
      t.numrange :num_range
    end
  end
end

# Comment this out once you've run it the first time
CreatePostgressqlRanges.new.migrate :up

class PostgresqlRange < ActiveRecord::Base
end

class RangeTest < MiniTest::Unit::TestCase
  def test
    # We can create a range successfully
    range = PostgresqlRange.create num_range: (1000..Float::INFINITY)
    assert_equal 1000, range.num_range.first
    assert_equal Float::INFINITY, range.num_range.last

    # And update it while we have the same object
    range.update_attributes num_range: (1000..Float::INFINITY)
    assert_equal 1000, range.num_range.first
    assert_equal Float::INFINITY, range.num_range.last

    # But if we get a new reference
    _range = PostgresqlRange.find range.id

    # Any attept to update yields FloatDomainError: Infinity

    assert_raises(FloatDomainError) do
      _range.update_attribute :num_range, (1000..Float::INFINITY)
    end

    assert_raises(FloatDomainError) do
      _range.update_attributes num_range: (1000..Float::INFINITY)
    end

    assert_raises(FloatDomainError) do
      _range.num_range = (1000..Float::INFINITY)
      _range.save
    end

  end
end