dovecot - May 2015 - Bug#776094: dovecot-imapd: corrupts mailbox after trying to retrieve it (fwd)

Debug output:

May  6 11:23:42 qemu-sid dovecot: master: Dovecot v2.2.16 starting up for imap
(core dumps disabled)
May  6 11:24:06 qemu-sid dovecot: imap-login: Login: user=<bluser>,
method=PLAIN, rip=192.168.122.8, lip=192.168.122.8, mpid=441, secured,
session=<HtpSW2YVaQDAqHoI>
May  6 11:24:06 qemu-sid dovecot: imap(bluser): Debug: Loading modules from
directory: /usr/lib/dovecot/modules
May  6 11:24:06 qemu-sid dovecot: imap(bluser): Debug: Module loaded:
/usr/lib/dovecot/modules/lib15_notify_plugin.so
May  6 11:24:06 qemu-sid dovecot: imap(bluser): Debug: Module loaded:
/usr/lib/dovecot/modules/lib20_mail_log_plugin.so
May  6 11:24:06 qemu-sid dovecot: imap(bluser): Debug: Effective uid=1000,
gid=1000, home=/home/bluser
May  6 11:24:06 qemu-sid dovecot: imap(bluser): Debug: Namespace inbox:
type=private, prefix=, sep=, inbox=yes, hidden=no, list=yes, subscriptions=yes
location=mbox:~/mail:INBOX=/var/mail/bluser
May  6 11:24:06 qemu-sid dovecot: imap(bluser): Debug: fs:
root=/home/bluser/mail, index=, indexpvt=, control=, inbox=/var/mail/bluser,
altMay  6 11:24:06 qemu-sid dovecot: imap(bluser): delete: box=inbox-b,
uid=15988, msgid=<20150113080229.634B31FE0F at example.com>, size=166
May  6 11:24:06 qemu-sid dovecot: imap(bluser): expunge: box=inbox-b, uid=15988,
msgid=<20150113080229.634B31FE0F at example.com>, size=166
May  6 11:24:06 qemu-sid dovecot: imap(bluser): Error: Sync failed for mbox file
/home/bluser/mail/inbox-b: seq=13 uid=15999 uid_broken=0 originally needed 0
bytes, now needs 23 bytes
May  6 11:24:06 qemu-sid dovecot: imap(bluser): delete: box=inbox-b, uid=15989,
msgid=<20150113080252.84E723FB47 at example.com>, size=238
May  6 11:24:06 qemu-sid dovecot: imap(bluser): expunge: box=inbox-b, uid=15989,
msgid=<20150113080252.84E723FB47 at example.com>, size=238
May  6 11:24:06 qemu-sid dovecot: imap(bluser): delete: box=inbox-b, uid=15990,
msgid=<20150113080253.3E89D5F8B1 at example.com>, size=238
May  6 11:24:06 qemu-sid dovecot: imap(bluser): expunge: box=inbox-b, uid=15990,
msgid=<20150113080253.3E89D5F8B1 at example.com>, size=238
May  6 11:24:06 qemu-sid dovecot: imap(bluser): delete: box=inbox-b, uid=15991,
msgid=<20150113080256.702551FD75 at example.com>, size=238
May  6 11:24:06 qemu-sid dovecot: imap(bluser): expunge: box=inbox-b, uid=15991,
msgid=<20150113080256.702551FD75 at example.com>, size=238
May  6 11:24:06 qemu-sid dovecot: imap(bluser): delete: box=inbox-b, uid=15992,
msgid=<20150113081736.928595F8B1 at example.com>, size=238
May  6 11:24:06 qemu-sid dovecot: imap(bluser): expunge: box=inbox-b, uid=15992,
msgid=<20150113081736.928595F8B1 at example.com>, size=238
May  6 11:24:06 qemu-sid dovecot: imap(bluser): delete: box=inbox-b, uid=15993,
msgid=<20150113090223.890703FBC5 at example.com>, size=166
May  6 11:24:06 qemu-sid dovecot: imap(bluser): expunge: box=inbox-b, uid=15993,
msgid=<20150113090223.890703FBC5 at example.com>, size=166
May  6 11:24:06 qemu-sid dovecot: imap(bluser): delete: box=inbox-b, uid=15994,
msgid=<20150113090225.EA3BF1FDD0 at example.com>, size=166
May  6 11:24:06 qemu-sid dovecot: imap(bluser): expunge: box=inbox-b, uid=15994,
msgid=<20150113090225.EA3BF1FDD0 at example.com>, size=166
May  6 11:24:06 qemu-sid dovecot: imap(bluser): delete: box=inbox-b, uid=15995,
msgid=<20150113090235.947643FB11 at example.com>, size=238
May  6 11:24:06 qemu-sid dovecot: imap(bluser): expunge: box=inbox-b, uid=15995,
msgid=<20150113090235.947643FB11 at example.com>, size=238
May  6 11:24:06 qemu-sid dovecot: imap(bluser): delete: box=inbox-b, uid=15996,
msgid=<20150113090252.ACE3D5F8B1 at example.com>, size=238
May  6 11:24:06 qemu-sid dovecot: imap(bluser): expunge: box=inbox-b, uid=15996,
msgid=<20150113090252.ACE3D5F8B1 at example.com>, size=238
May  6 11:24:06 qemu-sid dovecot: imap(bluser): delete: box=inbox-b, uid=15997,
msgid=<20150113090252.F11061FDAE at example.com>, size=238
May  6 11:24:06 qemu-sid dovecot: imap(bluser): expunge: box=inbox-b, uid=15997,
msgid=<20150113090252.F11061FDAE at example.com>, size=238
May  6 11:24:06 qemu-sid dovecot: imap(bluser): delete: box=inbox-b, uid=15998,
msgid=<20150113091737.92CD33FC52 at example.com>, size=238
May  6 11:24:06 qemu-sid dovecot: imap(bluser): expunge: box=inbox-b, uid=15998,
msgid=<20150113091737.92CD33FC52 at example.com>, size=238
May  6 11:24:06 qemu-sid dovecot: imap(bluser): Disconnected: Logged out in=1364
out=6726

For reference, this is the "dovecot -n" output matching the previous
debug output:

# 2.2.16: /etc/dovecot/dovecot.conf
# OS: Linux 3.16.0-4-amd64 x86_64 Debian stretch/sid 
mail_debug = yes
mail_location = mbox:~/mail:INBOX=/var/mail/%u
mail_plugins = mail_log notify
namespace inbox {
  inbox = yes
  location = 
  mailbox Drafts {
    special_use = \Drafts
  }
  mailbox Junk {
    special_use = \Junk
  }
  mailbox Sent {
    special_use = \Sent
  }
  mailbox "Sent Messages" {
    special_use = \Sent
  }
  mailbox Trash {
    special_use = \Trash
  }
  prefix = 
}
passdb {
  driver = pam
}
plugin {
  mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename
  mail_log_fields = uid box msgid size
}
protocols = " imap"
ssl = no
userdb {
  driver = passwd
}

Thanks, fixed: http://hg.dovecot.org/dovecot-2.2/rev/94bd895721d8