I am seeing an intermittent problem with frm in mailutils 3.19, 3.20, and also in current git master. I don't have a reliable way to reproduce this yet, as I am seeing different output at different times when the mailbox has not changed.
Sometimes, this "free(): invalid size" error occurs: $ frm -t ~/Mail/inbox.mbox <outputs correct subject lines> free(): invalid size Aborted frm -t Mail/inbox.mbox I will update this thread when I have further info.
