keyword_argument_error.rb

2.3.1 :001 > def foo; end
 => :foo
2.3.1 :002 > def bar1(*args, **options); foo(*args, **options); end
 => :bar1
2.3.1 :003 > def bar2(*args, **options); args == [] && options == {}; end
 => :bar2
2.3.1 :004 > def bar3; foo(*[], **{}); end
 => :bar3
2.3.1 :005 > bar1
ArgumentError: wrong number of arguments (given 1, expected 0)
	from (irb):1:in `foo'
	from (irb):2:in `bar1'
	from (irb):5
	from /Users/peter/.rvm/rubies/ruby-2.3.1/bin/irb:11:in `<main>'
2.3.1 :006 > bar2
 => true
2.3.1 :007 > bar3
 => nil