[Dovecot] Panic: file mail-storage.c: line 791 (mailbox_check_mismatching_separators)

[Claus Rosenberger]

Hi,

with fetching the folder structure with the webclient Tine i can see following error messages inside of the logfiles:

Panic: file mail-storage.c: line 791 (mailbox_check_mismatching_separators): assertion failed: (strncmp(vname, ns->prefix, ns->prefix_len-1) == 0)

Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(+0x448fa) [0x7f70036db8fa] -> /usr/lib/dovecot/libdovecot.so.0(+0x44946) [0x7f70036db946] -> /usr/lib/dovecot/libdovecot.so.0(+0x1b8ca) [0x7f70036b28ca] -> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_open_stream+0) [0x7f70039a1550] -> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_open+0xf) [0x7f70039a156f] -> dovecot/imap(cmd_select_full+0x14a) [0x40db1a] -> dovecot/imap(command_exec+0x3d) [0x41160d] -> dovecot/imap() [0x41058e] -> dovecot/imap() [0x41066d] -> dovecot/imap(client_handle_input+0x135) [0x410895] -> dovecot/imap(client_input+0x5f) [0x4111bf] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x36) [0x7f70036e7ea6] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x9f) [0x7f70036e8f2f] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x28) [0x7f70036e7e48] -> /usr/lib/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7f70036d4103] -> dovecot/imap(main+0x2a5) [0x419695] -> /lib/libc.so.6(__libc_start_main+0xfd) [0x7f7003353c8d] -> dovecot/imap() [0x408f49]

Fatal: master: service(imap): child 21152 killed with signal 6 (core dumps disabled)

------------
dovecot -n
------------
# 2.1.7: /etc/dovecot/dovecot.conf
# OS: Linux 2.6.32-5-amd64 x86_64 Debian 6.0.5 ext4
first_valid_gid = 104
first_valid_uid = 107
last_valid_gid = 104
last_valid_uid = 107
login_trusted_networks = 10.20.11.4
mail_gid = 104
mail_location = maildir:/var/spool/dovecot/%Ld/%Ln/Maildir
mail_plugins = quota acl
mail_privileged_group = mail
mail_uid = 107
managesieve_notify_capability = mailto
managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date ihave
namespace {
  hidden = no
  list = children
  location = maildir:/var/spool/dovecot/%%d/%%n/Maildir:INDEX=/var/spool/dovecot/%d/%n/Maildir/shared/%%n
  prefix = shared/%%n/
  separator = /
  type = shared
}
namespace inbox {
  inbox = yes
  location =
  prefix = INBOX/
  separator = /
  type = private
}
namespace virtual {
  alias_for = INBOX/
  hidden = yes
  list = no
  location =
  prefix =
  separator = /
  type = private
}
passdb {
  args = /etc/dovecot/dovecot-ldap.conf.ext
  driver = ldap
}
plugin {
  acl = vfile
  acl_shared_dict = file:/var/spool/dovecot/%d/shared-mailboxes
  quota = maildir:User quota
  quota_rule = *:storage=1GB
  sieve = /var/spool/dovecot/%Ld/%Ln/.dovecot.sieve
  sieve_dir = /var/spool/dovecot/%Ld/%Ln/sieve
}
postmaster_address = postmaster at rocnet.de
protocols = " imap sieve pop3 sieve"
service auth {
  unix_listener auth-userdb {
    group = dovecot
    mode = 0660
    user = vmail
  }
}
service imap-login {
  inet_listener imap {
    port = 0
  }
  inet_listener imaps {
    port = 993
    ssl = yes
  }
}
service imap {
  process_limit = 1024
}
service pop3-login {
  inet_listener pop3 {
    port = 0
  }
  inet_listener pop3s {
    port = 995
    ssl = yes
  }
}
service pop3 {
  process_limit = 1024
}
ssl_cert = </etc/ssl/certs/pop3d.pem
ssl_key = </etc/ssl/private/pop3d.pem
userdb {
  args = /etc/dovecot/dovecot-ldap.conf.ext
  driver = ldap
}
protocol lda {
  mail_plugins = quota acl sieve
}
protocol imap {
  mail_plugins = quota acl imap_quota imap_acl
}


I checked if there are special characters in the folder structure but there are only standard ones.

----
Claus