I've just had another look at the issue, and found a possible solution. If you want to spend some time testing it, that would be really helpful - look for anything that might use the def csvquote, and use it.
In the affected line, I actually removed all parts except the first one, str[/[,\"]/], because I don't think they're useful. Again, I don't think there'd be any problems, but I haven't properly tested it.