Ruby

CSV.generate_line throws an exception when I specify write_nil_value or write_nil_value.

> CSV.generate_line [1,nil,3] => "1,,3\n" > CSV.generate_line [1,nil,3], write_nil_value: 'x' Traceback (most recent call last): 12: from /usr/bin/irb:23:in `<main>' 11: from /usr/bin/irb:23:in `load' 10: from /usr/lib/ruby/gems/2.7.0/gems/irb-1.2.7/exe/irb:11:in `<top (required)>' 9: from (irb):3 8: from (irb):4:in `rescue in irb_binding' 7: from /usr/lib/ruby/2.7.0/csv.rb:569:in `generate_line' 6: from /usr/lib/ruby/2.7.0/csv.rb:1230:in `<<' 5: from /usr/lib/ruby/2.7.0/csv/writer.rb:44:in `<<' 4: from /usr/lib/ruby/2.7.0/csv/fields_converter.rb:50:in `convert' 3: from /usr/lib/ruby/2.7.0/csv/fields_converter.rb:50:in `with_index' 2: from /usr/lib/ruby/2.7.0/csv/fields_converter.rb:50:in `collect' 1: from /usr/lib/ruby/2.7.0/csv/fields_converter.rb:53:in `block in convert' NoMethodError (undefined method `empty?' for 1:Integer) > CSV.generate_line [1,nil,3], write_empty_value: 'x' NoMethodError (undefined method `empty?' for 1:Integer)