dovecot - Jul 2014 - Dovecot 2.2.13 Assertion failed in mailbox_list_create

Hi

I got this error when configured imapc proxy
(http://wiki2.dovecot.org/HowTo/ImapcProxy) and moved indexes to memory
(mail_location = imapc:~/imapc:INDEX=MEMORY), with indexes on disk this error
does not occurred.

Jul 16 17:06:31 imap-login: Info: Login: user=<user87>, method=PLAIN,
rip=127.0.0.1, lip=127.0.0.1, mpid=21703, secured,
session=<iwFgMU/+lwB/AAAB>
Jul 16 17:06:31 imap(user87): Panic: file mailbox-list.c: line 136
(mailbox_list_create): assertion failed: (set->root_dir == NULL ||
*set->root_dir != '\0' || ((*class_p)->props &
MAILBOX_LIST_PROP_NO_ROOT) != 0)
Jul 16 17:06:31 imap(user87): Error: Raw backtrace:
/home/lion/dovecot-2.2/lib/dovecot/libdovecot.so.0(+0x872a6) [0x7f39be4d52a6]
-> /home/lion/dovecot-2.2/lib/dovecot/libdovecot.so.0(+0x88683)
[0x7f39be4d6683] ->
/home/lion/dovecot-2.2/lib/dovecot/libdovecot.so.0(i_fatal+0) [0x7f39be4d55f9]
->
/home/lion/dovecot-2.2/lib/dovecot/libdovecot-storage.so.0(mailbox_list_create+0x204)
[0x7f39be7ff031] ->
/home/lion/dovecot-2.2/lib/dovecot/libdovecot-storage.so.0(+0x78934)
[0x7f39be7d4934] ->
/home/lion/dovecot-2.2/lib/dovecot/libdovecot-storage.so.0(+0x78bbb)
[0x7f39be7d4bbb] ->
/home/lion/dovecot-2.2/lib/dovecot/libdovecot-storage.so.0(mailbox_list_get_path+0x34)
[0x7f39be80230a] ->
/home/lion/dovecot-2.2/lib/dovecot/libdovecot-storage.so.0(mailbox_get_path_to+0x8a)
[0x7f39be7f9455] ->
/home/lion/dovecot-2.2/lib/dovecot/libdovecot-storage.so.0(+0x9a0ee)
[0x7f39be7f60ee] ->
/home/lion/dovecot-2.2/lib/dovecot/libdovecot-storage.so.0(mailbox_get_status+0x32)
[0x7f39be7f793c] -> dovecot/imap(imap_status_get+0xf0) [
0x4252ac] -> dovecot/imap(cmd_status+0x1b7) [0x416177] ->
dovecot/imap(command_exec+0x5f) [0x41bdf4] -> dovecot/imap() [0x41ad47] ->
dovecot/imap() [0x41b049] -> dovecot/imap() [0x41b169] ->
dovecot/imap(client_handle_input+0x7e) [0x41b1e9] ->
dovecot/imap(client_input+0xe6) [0x41b37c] ->
/home/lion/dovecot-2.2/lib/dovecot/libdovecot.so.0(io_loop_call_io+0xb6)
[0x7f39be4eec32] ->
/home/lion/dovecot-2.2/lib/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0x1e5)
[0x7f39be4f0ce4] ->
/home/lion/dovecot-2.2/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x18)
[0x7f39be4eedcd] ->
/home/lion/dovecot-2.2/lib/dovecot/libdovecot.so.0(io_loop_run+0xaf)
[0x7f39be4eed26] ->
/home/lion/dovecot-2.2/lib/dovecot/libdovecot.so.0(master_service_run+0x2e)
[0x7f39be477d6d] -> dovecot/imap(main+0x2b3) [0x428a6d] ->
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed) [0x7f39be0af76d] ->
dovecot/imap() [0x40ad59]


# 2.2.13 (fd0616d553b0+): /home/lion/dovecot-2.2/etc/dovecot/dovecot.conf
# OS: Linux 3.11.0-24-generic x86_64 Ubuntu 12.04.4 LTS
auth_mechanisms = plain login
default_internal_user = lion
default_login_user = lion
disable_plaintext_auth = no
imapc_host = localhost
log_path = /home/lion/dovecot-2.2/var/log/dovecot.log
mail_home = /home/lion/dovecot-2.2/home/vmail/%u
mail_location = imapc:~/imapc:INDEX=MEMORY
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 {
  args = host=localhost port=143
  default_fields = userdb_imapc_user=%u userdb_imapc_password=%w
  driver = imap
}
plugin {
  fts = solr
  fts_solr = url=http://localhost:8080/solr/ break-imap-search
  mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename
  mail_log_fields = uid box msgid size
}
service anvil {
  chroot }
service auth-worker {
  user = $default_internal_user
}
service imap-login {
  chroot   inet_listener imap {
    port = 10143
  }
  inet_listener imaps {
    port = 10993
  }
}
service lmtp {
  chroot }
service pop3-login {
  chroot   inet_listener pop3 {
    port = 10110
  }
  inet_listener pop3s {
    port = 10995
  }
}
ssl = no
userdb {
  driver = prefetch
}