doveadm index panic

[Nick Rosier]

Hi,

running dovecot 2.2.18. when I try to re-index my INBOX I get following 
error:

# doveadm index -u user at domain.com INBOX
doveadm(user at domain.com): Warning: I/O leak: 0x80101ada0 (line 120, fd 
15)
doveadm(user at domain.com): Warning: Timeout leak: 0x801019fe0 (line 325)
doveadm(user at domain.com): Panic: file ioloop.c: line 39 (io_add_file): 
assertion failed: (callback != NULL)
zsh: abort      doveadm index -u user at domain.com INBOX

Any ideas?

Rgds,
N.