After upgrading from 1.1.3 to 1.1.4 the imap process crashes as soon as moving a mail to the Trash folder. Belows backtrace points to the expire plugin...

Backtrace /usr/local/libexec/dovecot/imap:

Program terminated with signal 11, Segmentation fault. #0 0x2adbeaa8 in expire_mailbox_transaction_commit (t=0x10045248, uid_validity_r=0x7fff77fc, first_saved_uid_r=0x7fff7800, last_saved_uid_r=0x7fff7804) at expire-plugin.c:124 124 key = t_strconcat(DICT_PATH_SHARED, expire.username, "/", (gdb) bt full #0 0x2adbeaa8 in expire_mailbox_transaction_commit (t=0x10045248, uid_validity_r=0x7fff77fc, first_saved_uid_r=0x7fff7800, last_saved_uid_r=0x7fff7804) at expire-plugin.c:124 key = 0x7fff7800 "à\f" value = 0x10010290 "" _data_stack_cur_id = 4750760 xpr_box = (struct expire_mailbox *) 0x10042250 xt = (struct expire_transaction_context *) 0x10032f50 new_stamp = 268644240 update_dict = false ret = 4 #1 0x2ace6b90 in quota_mailbox_transaction_commit (ctx=0x10045248, uid_validity_r=0x7fff77fc, first_saved_uid_r=0x7fff7800, last_saved_uid_r=0x7fff7804) at quota-storage.c:95 qbox = (struct quota_mailbox *) 0x100422d0 qt = (struct quota_transaction_context *) 0x10032f60 #2 0x0048c90c in mailbox_transaction_commit_get_uids (_t=0x5, uid_validity_r=0x7fff7f70, first_saved_uid_r=0x10009f90, last_saved_uid_r=0x1006e6b0) at mail-storage.c:689 t = (struct mailbox_transaction_context *) 0x4 #3 0x00413430 in cmd_copy (cmd=0x100160c0) at cmd-copy.c:141 client = (struct client *) 0x10015e18 storage = (struct mail_storage *) 0x10015730 destbox = (struct mailbox *) 0x10042090 t = (struct mailbox_transaction_context *) 0x0 search_arg = (struct mail_search_arg *) 0x1 messageset = 0x1001a1c8 "7531" mailbox = 0x1001a1d0 "Trash" src_uidset = 0x1000a2b0 "7531" msg = 0x0 sync_flags = 0 imap_flags = 0 copy_count = 1 uid_validity = 1181584605 uid1 = 3296 uid2 = 3296 ret = 1 #4 0x0041a964 in cmd_uid (cmd=0x100160c0) at cmd-uid.c:26 command = (struct command *) 0x1006e6b0 cmd_name = 0x1001a1c0 "copy" #5 0x0041cb98 in client_command_input (cmd=0x100160c0) at client.c:580 client = (struct client *) 0x10015e18 command = (struct command *) 0x4 #6 0x0041c950 in client_command_input (cmd=0x100160c0) at client.c:629 client = (struct client *) 0x10015e18 command = (struct command *) 0x4 #7 0x0041cc78 in client_handle_next_command (client=0x10015e18, remove_io_r=0x7fff7918) at client.c:645 size = 25 #8 0x0041cde0 in client_handle_input (client=0x10015e18) at client.c:680 _data_stack_cur_id = 3 ret = 24 remove_io = false handled_commands = false #9 0x0041d01c in client_input (client=0x10015e18) at client.c:725 cmd = (struct client_command_context *) 0x0 output = (struct ostream *) 0x10015ff8 bytes = 25 #10 0x004ec54c in io_loop_handler_run (ioloop=0x10012938) at ioloop-poll.c:204 ctx = (struct ioloop_handler_context *) 0x10012a30 pollfd = (struct pollfd *) 0x2 tv = {tv_sec = 4, tv_usec = 747645} io = (struct io_file *) 0x10016058 t_id = 2 msecs = 4 ret = 0 call = false #11 0x004eae40 in io_loop_run (ioloop=0x10012938) at ioloop.c:320 No locals. #12 0x0042bae0 in main (argc=5, argv=0x7fff7a54, envp=0x7fff7a5c) at main.c:293 No locals.

dovecot -n:

# 1.1.4: /etc/dovecot/dovecot.conf log_path: /var/log/mail/dovecot.log info_log_path: /var/log/mail/dovecot.log ssl_disable: yes disable_plaintext_auth: no login_dir: /var/run/dovecot/login login_executable: /usr/local/libexec/dovecot/imap-login login_process_size: 16 max_mail_processes: 16 mail_location: maildir:~/Maildir mail_drop_priv_before_exec: yes mail_process_size: 64 mail_plugins: quota imap_quota expire auth default: passdb: driver: pam userdb: driver: passwd socket: type: listen client: path: /var/run/dovecot/auth-client mode: 432 user: dovecot group: mail master: path: /var/run/dovecot/auth-master mode: 384 plugin: quota: maildir quota_rule: *:storage=1GB quota_rule2: Trash:storage=10%% expire: Trash 1 expire_dict: proxy::expiredict dict: expiredict: db:/var/lib/dovecot/expire.db