index worker 2.3.7 undefined symbol errors

[Dirk Koopman]

Suddenly I am getting undefined symbol errors having updated to 2.3.7.

Jul 18 01:02:49 localhost dovecot: indexer-worker: Error: User <someone> 
lookup failed: Couldn't load required plugin 
/usr/lib/dovecot/modules/lib95_imap_sieve_plugin.so: dlopen() failed: 
/usr/lib/dovecot/modules/lib95_imap_sieve_plugin.so: undefined symbol: 
command_hook_register

(I think I fixed this one by a config change)

But I am left with this:

Jul 19 14:09:52 localhost dovecot: indexer-worker: Error: User <someone> 
lookup failed: Couldn't load required plugin 
/usr/lib/dovecot/modules/lib90_sieve_plugin.so: dlopen() faile: 
/usr/lib/dovecot/modules/lib90_sieve_plugin.so: undefined symbol: 
mail_deliver_ctx_get_log_var_expand_table

My (redacted) dovecot -n:

# 2.3.7 (494d20bdc): /etc/dovecot/dovecot.conf
# Pigeonhole version 0.5.7 (5a4e63b5)
# OS: Linux 4.15.0-54-generic x86_64 Ubuntu 18.04.2 LTS
# Hostname: localhost
auth_verbose = yes
first_valid_uid = 2000
imapc_features = rfc822.size fetch-headers
imapc_host = mailman.tobit.co.uk
imapc_port = 993
imapc_ssl = imaps
imapc_ssl_verify = no
imapc_user = %n
lda_mailbox_autocreate = yes
mail_attachment_dir = %h/attachments
mail_attachment_min_size = 64 k
mail_location = mdbox:%h:INBOX=%h/mail
mail_plugins = mail_log notify replication fts fts_lucene sieve
mail_prefetch_count = 20
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 imapsieve vnd.dovecot.imapsieve
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 = # hidden
   driver = sql
}
plugin {
   fts = lucene
   fts_autoindex = yes
   fts_autoindex_exclude = \Junk
   fts_autoindex_exclude2 = \Trash
   fts_autoindex_exclude3 = \Deleted
   fts_lucene = whitespace_chars=@.
   imapsieve_mailbox1_before = file:/etc/dovecot/sieve/report-spam.sieve
   imapsieve_mailbox1_causes = COPY
   imapsieve_mailbox1_name = Junk
   imapsieve_mailbox2_before = file:/etc/dovecot/sieve/report-ham.sieve
   imapsieve_mailbox2_causes = COPY
   imapsieve_mailbox2_from = Junk
   imapsieve_mailbox2_name = *
   mail_log_events = delete undelete expunge copy save mailbox_delete 
mailbox_rename mailbox_create
   mail_log_fields = uid box msgid size
   sieve = file:~/sieve;active=~/.dovecot.sieve
   sieve_global_extensions = +vnd.dovecot.pipe +vnd.dovecot.environment
   sieve_pipe_bin_dir = /etc/dovecot/sieve
   sieve_plugins = sieve_imapsieve sieve_extprograms
   sieve_trace_dir = /tmp
   sieve_trace_level = matching
}
postmaster_address = postmaster at tobit.co.uk
protocols = imap lmtp sieve
service auth {
   unix_listener exim-auth {
     group = Debian-exim
     mode = 0660
     user = Debian-exim
   }
}
service imap-login {
   inet_listener imap {
     port = 143
   }
   inet_listener imaps {
     port = 993
     ssl = yes
   }
}
service lmtp {
   inet_listener lmtp {
     address = 127.0.0.1
     port = # hidden
   }
   unix_listener lmtp {
     mode = 0666
   }
   user = vmail
}
service managesieve-login {
   inet_listener sieve {
     port = # hidden
   }
   process_min_avail = 0
   service_count = 1
   vsz_limit = 64 M
}
service managesieve {
   process_limit = 100
}
ssl_cert = # hidden
ssl_client_ca_dir = /etc/ssl/certs
ssl_dh = # hidden, use -P to show it
ssl_key = # hidden, use -P to show it
userdb {
   args = # hidden
   driver = sql
}
protocol imap {
   mail_plugins = mail_log notify replication fts fts_lucene imap_sieve
}
protocol lmtp {
   mail_plugins = fts fts_lucene sieve
}

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