doveadm mailbox status also doesn't like bar's mailboxes:
doveadm mailbox status -u bar -t all \* doveadm(bar): Error: Opening mailbox INBOX/Lists failed: Mailbox doesn't exist: INBOX/Lists doveadm(bar): Error: Opening mailbox INBOX/Lists/vmm failed: Mailbox doesn't exist: INBOX/Lists/vmm doveadm(bar): Error: Opening mailbox INBOX/Lists/Postfix failed: Mailbox doesn't exist: INBOX/Lists/Postfix doveadm(bar): Error: Opening mailbox INBOX/Lists/Debian failed: Mailbox doesn't exist: INBOX/Lists/Debian doveadm(bar): Error: Opening mailbox INBOX/Lists/Gentoo failed: Mailbox doesn't exist: INBOX/Lists/Gentoo GC Warning: Repeated allocation of very large block (appr. size 2101248): May lead to memory leak and poor performance. doveadm(bar): Error: Opening mailbox INBOX/Lists/Dovecot/Pigeonhole failed: Mailbox doesn't exist: INBOX/Lists/Dovecot/Pigeonhole doveadm(bar): Error: Opening mailbox INBOX/Bugs failed: Mailbox doesn't exist: INBOX/Bugs messages=59247 recent=1 unseen=0 vsize=327910493
-- The trapper recommends today: c01dcofe.1017215@localdomain.org