mail-search backtrace

[Hugh Bragg]

I'm repeatedly getting this error:

Apr 07 04:37:27 imap(mymail at address): Panic: file mail-search.c: line 84 
(mail_search_arg_init): assertion failed: (arg->initialized.keywords == 
NULL)
Apr 07 04:37:27 imap(mymail at address): Error: Raw backtrace: 
/usr/lib64/dovecot/libdovecot.so.0(+0x827c2) [0x7fcb7f65e7c2] -> 
/usr/lib64/dovecot/libdovecot.so.0(+0x828ad) [0x7fcb7f65e8ad] -> 
/usr/lib64/dov
ecot/libdovecot.so.0(i_fatal+0) [0x7fcb7f605b01] -> 
/usr/lib64/dovecot/libdovecot-storage.so.0(mail_search_arg_init+0x228) 
[0x7fcb7f91a328] -> 
/usr/lib64/dovecot/libdovecot-storage.so.0(index_search_result_updat
e_flags+0x100) [0x7fcb7f98e470] -> 
/usr/lib64/dovecot/libdovecot-storage.so.0(index_sync_search_results_update+0x52) 
[0x7fcb7f9983e2] -> 
/usr/lib64/dovecot/libdovecot-storage.so.0(index_mailbox_sync_deinit+0x185
) [0x7fcb7f998bb5] -> 
/usr/lib64/dovecot/libdovecot-storage.so.0(mailbox_sync_deinit+0x32) 
[0x7fcb7f921222] -> 
/usr/lib64/dovecot/lib20_virtual_plugin.so(virtual_storage_sync_init+0xab3) 
[0x7fcb7e9f7313] -> /usr
/lib64/dovecot/libdovecot-storage.so.0(mailbox_sync_init+0x3b) 
[0x7fcb7f92119b] -> dovecot/imap(imap_sync_init+0x68) [0x55b6ef47c238] 
-> dovecot/imap(cmd_sync_delayed+0x242) [0x55b6ef47cfb2] -> 
dovecot/imap(clie
nt_handle_input+0x220) [0x55b6ef4706b0] -> 
dovecot/imap(client_input+0x82) [0x55b6ef470b82] -> 
/usr/lib64/dovecot/libdovecot.so.0(io_loop_call_io+0x4c) 
[0x7fcb7f67228c] -> /usr/lib64/dovecot/libdovecot.so.0(io_l
oop_handler_run_internal+0x101) [0x7fcb7f673731] -> 
/usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run+0x25) 
[0x7fcb7f672315] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_run+0x38) 
[0x7fcb7f6724b8] -> /usr/
lib64/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7fcb7f60b663] 
-> dovecot/imap(main+0x2db) [0x55b6ef463a0b] -> 
/lib64/libc.so.6(__libc_start_main+0xf0) [0x7fcb7f23b580] -> 
dovecot/imap(_start+0x29) [0x5
5b6ef463b99]


[root:~] # dovecot -n
# 2.2.22 (fe789d2): /etc/dovecot/dovecot.conf
# Pigeonhole version 0.4.12 (c1c0a23)
# OS: Linux 4.4.6-300.fc23.x86_64 x86_64 Fedora release 23 (Twenty Three)
auth_mechanisms = plain login
auth_socket_path = /var/run/dovecot/auth-userdb
imap_client_workarounds = tb-extra-mailbox-sep
listen = *
log_path = /var/log/dovecot.log
mail_access_groups = mail, vmail
mail_home = /var/mail/vmail/%d/%n
mail_location = maildir:~/mail
mail_plugins = virtual, acl
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 index ihave duplicate mime foreverypart extracttext
mbox_write_locks = fcntl
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 =
}
namespace virtual {
   location = virtual:/var/mail/vhosts/%d/%n/virtual
   prefix = virtual.
   separator = .
}
passdb {
   args = scheme=PLAIN username_format=%u /etc/dovecot/dovecot-users
   driver = passwd-file
}
plugin {
   acl = vfile
   acl_shared_dict = file:/var/mail/vhosts/shared-mailboxes.db
   fetchmail_helper = /var/mail/vhosts/bin/restart_fetchmail %h reload
   fetchmail_interval = 3000000
   fetchmail_pidfile = %h/.fetchmail.pid
   sieve = ~/.dovecot.sieve
   sieve_dir = ~/sieve
   sieve_global_dir = /var/mail/vhosts/sieve-global
}
protocols = imap lmtp sieve
service auth-worker {
   user = vmail
}
service auth {
   unix_listener /var/spool/postfix/private/auth {
     group = postfix
     mode = 0660
     user = postfix
   }
   unix_listener auth-userdb {
     group = vmail
     mode = 0660
     user = vmail
   }
}
service imap-login {
   inet_listener imap {
     port = 143
   }
   inet_listener imaps {
     port = 0
     ssl = yes
   }
}
service lmtp {
   unix_listener /var/spool/postfix/private/dovecot-lmtp {
     group = postfix
     mode = 0600
     user = postfix
   }
}
service managesieve-login {
   inet_listener sieve {
     port = 4190
   }
}
service pop3-login {
   inet_listener pop3 {
     port = 0
   }
   inet_listener pop3s {
     port = 0
   }
}
ssl = required
ssl_cert = </etc/pki/dovecot/certs/hjbmx.ddns.net.cert.pem
ssl_cipher_list = PROFILE=SYSTEM
ssl_key = </etc/pki/dovecot/private/hjbmx.ddns.net.key.pem
userdb {
   args = uid=vmail gid=vmail home=/var/mail/vhosts/%d/%n
   driver = static
}
protocol lmtp {
   mail_plugins = virtual, acl , sieve
}
protocol lda {
   mail_plugins = virtual, acl , sieve
}
protocol imap {
   mail_plugins = virtual, acl , imap_acl
}