NoMethodError occurred at #gets after MalformedCSVError

[krororo]

reproduction code:

require 'csv'

puts CSV::VERSION
csv = CSV.new(<<~CSV, headers: true, return_headers: true)
  head1,head2,head3
  aaa,bbb,ccc
  ddd,ee"e.fff
  ggg,hhh,iii
CSV

until csv.eof?
  begin
    p csv.gets
  rescue CSV::MalformedCSVError => e
    p e
  end
end

ruby 2.6.2:

$ ruby -v && ruby /tmp/csv.rb
ruby 2.6.2p47 (2019-03-13 revision 67232) [x86_64-linux]
3.0.4
#<CSV::Row "head1":"head1" "head2":"head2" "head3":"head3">
#<CSV::Row "head1":"aaa" "head2":"bbb" "head3":"ccc">
#<CSV::MalformedCSVError: Illegal quoting in line 3.>
Traceback (most recent call last):
	3: from /tmp/csv.rb:1:in `each'
	2: from /home/krororo/.rbenv/versions/2.6.2/lib/ruby/2.6.0/csv/parser.rb:236:in `parse'
	1: from /home/krororo/.rbenv/versions/2.6.2/lib/ruby/2.6.0/csv/parser.rb:236:in `new'
/home/krororo/.rbenv/versions/2.6.2/lib/ruby/2.6.0/csv/row.rb:35:in `initialize': undefined method `size' for nil:NilClass (NoMethodError)

ruby 2.5.3:

$ ruby -v && ruby /tmp/csv.rb
ruby 2.5.3p105 (2018-10-18 revision 65156) [x86_64-linux]
2.4.8
#<CSV::Row "head1":"head1" "head2":"head2" "head3":"head3">
#<CSV::Row "head1":"aaa" "head2":"bbb" "head3":"ccc">
#<CSV::MalformedCSVError: Illegal quoting in line 3.>
#<CSV::Row "head1":"ggg" "head2":"hhh" "head3":"iii">

The expected behavior is to get data after an error occurs.

[kou]

Thanks for your report.
I've fixed it.

BTW, the following backtrace is strange. It may be a CRuby bug. Could you report this to https://bugs.ruby-lang.org/projects/ruby-trunk/issues/new ?

	3: from /tmp/csv.rb:1:in `each'

[krororo]

I opened https://bugs.ruby-lang.org/issues/15719

[kou]

Thanks!