SpamAssassin Backlist/Whitelisted bug with double quote

[mean]

Hello DA Team.

When the customer adds an email address to SpamAssassin's blacklist/whitelist, including single-quote and double-quote emails,
it cannot be received in all mailboxes.

Error on mail log message.

R=domain_filter defer (-17): error in filter file: "and" or "or" or "then" expected near line 10 of filter file, but found """

The problem because regular expression is invalid.

I think please check and validation the input string (email, domain, text string) working with regular expression before saving; it's better.

/etc/virtual/domain.com/filter