Adam McDougall wrote:

I noticed these happen when one of my users searches his Trash folder which he doesn't empty. He uses thunderbird and it is reproducable.

Feb 5 22:47:39 boomhauer dovecot: IMAP(username): file message-header-parser.c: line 350 (message_parse_header_next): assertion failed: +(IS_LWSP(line->value[0])) Feb 5 22:47:41 boomhauer dovecot: child 8022 (imap) killed with signal 6 Feb 5 22:48:21 boomhauer dovecot: IMAP(username): file message-header-parser.c: line 350 (message_parse_header_next): assertion failed: +(IS_LWSP(line->value[0])) Feb 5 22:48:24 boomhauer dovecot: child 8121 (imap) killed with signal 6 Feb 5 22:49:13 boomhauer dovecot: IMAP(username): file message-header-parser.c: line 350 (message_parse_header_next): assertion failed: +(IS_LWSP(line->value[0])) Feb 5 22:49:15 boomhauer dovecot: child 8171 (imap) killed with signal 6

I hope this is enough of a backtrace, let me know if not:

GNU gdb 6.1.1 [FreeBSD] Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "amd64-marcel-freebsd"... Core was generated by `imap'. Program terminated with signal 6, Aborted. Reading symbols from /usr/local/lib/libiconv.so.3...done. Loaded symbols for /usr/local/lib/libiconv.so.3 Reading symbols from /lib/libc.so.6...done. Loaded symbols for /lib/libc.so.6 Reading symbols from /usr/local/lib/dovecot/imap/lib01_acl_plugin.so...done. Loaded symbols for /usr/local/lib/dovecot/imap/lib01_acl_plugin.so Reading symbols from /usr/local/lib/dovecot/imap/lib20_fts_plugin.so...done. Loaded symbols for /usr/local/lib/dovecot/imap/lib20_fts_plugin.so Reading symbols from /usr/local/lib/dovecot/imap/lib21_fts_squat_plugin.so...done. Loaded symbols for /usr/local/lib/dovecot/imap/lib21_fts_squat_plugin.so Reading symbols from /libexec/ld-elf.so.1...done. Loaded symbols for /libexec/ld-elf.so.1 #0 0x00000000109d54ac in __res_pquery () from /lib/libc.so.6

Sorry, maybe bt full would be more helpful: #0 0x00000000109d54ac in __res_pquery () from /lib/libc.so.6 No symbol table info available. #1 0x00000000004a8e1b in i_panic (format=0x4d60e0 "Tue") at failures.c:191 args = {{gp_offset = 40, fp_offset = 48, overflow_arg_area = 0x7fffffffdf30, reg_save_area = 0x7fffffffde70}} #2 0x00000000004a0149 in message_parse_header_next (ctx=0x18c3f00, hdr_r=0x7fffffffdff0) at message-header-parser.c:341 line = (struct message_header_line *) 0x18c3f00 msg = (const unsigned char *) 0x4511000 "" i = 46 size = 46 startpos = 0 colon_pos = 0 parse_size = 361 ret = 1 continued = true continues = false last_no_newline = true last_crlf = false no_newline = false crlf_newline = false __PRETTY_FUNCTION__ = "message_parse_header_next" #3 0x00000000004a11e9 in parse_content_type (ctx=0x600180, hdr=0x0) at message-parser.c:441 parser = {data = 0x7fffffffe000 "�����\177", end = 0x1004a773d <Address 0x1004a773d out of bounds>, last_comment = 0x1ffffe010} key = 0x4a11e9 "�H\215u�H\215}��\t," value = 0x7fffffffe010 "@����\177" content_type = (string_t *) 0x1 #4 0x00000000004a1bb6 in message_parser_init_from_parts (parts=0x450f848, input=0x7fffffffe0c0, hdr_flags=32767, flags=16769184) at message-parser.c:718 ctx = (struct message_parser_ctx *) 0xffffe040 #5 0x0000000010c2355d in fts_mailbox_search_next_nonblock () from /usr/local/lib/dovecot/imap/lib20_fts_plugin.so No symbol table info available. #6 0x000000000046b353 in mailbox_search_deinit (_ctx=0xc42200) at mail-storage.c:624 ctx = (struct mail_search_context *) 0xd8f448 #7 0x0000000000418f2f in imap_search_deinit (cmd=0x60c300, ctx=0x61d048) at cmd-search.c:64 ret = 0 #8 0x000000000041916e in cmd_search_more (cmd=0x4b2216) at cmd-search.c:119 ctx = (struct imap_search_context *) 0x7fffffffe1e0 end_time = {tv_sec = 140737488347616, tv_usec = 4297070} tryagain = false ret = 3 #9 0x00000000004b25ef in io_loop_handle_timeouts_real (ioloop=0x5ff240) at ioloop.c:257 diff = 12939328 item = (struct priorityq_item *) 0xc57040 tv = {tv_sec = 0, tv_usec = 0} tv_call = {tv_sec = 1202269828, tv_usec = 256050} t_id = 3 #10 0x00000000004b263d in io_loop_handle_timeouts_real (ioloop=0x5ff240) at ioloop.c:267 item = (struct priorityq_item *) 0x20060a0e8 tv = {tv_sec = 140737488347728, tv_usec = 4924989} tv_call = {tv_sec = 12939328, tv_usec = 6287936} t_id = 0 #11 0x00000000004b351e in io_loop_handler_run (ioloop=0x5ff240) at ioloop-kqueue.c:123 ctx = (struct ioloop_handler_context *) 0x60a0e0 events = (struct kevent *) 0x60e000 event = (const struct kevent *) 0x60e000 tv = {tv_sec = 0, tv_usec = 0} ts = {tv_sec = 0, tv_nsec = 0} io = (struct io_file *) 0x5ff940 events_count = 4 t_id = 2 ret = 0 i = 0 __PRETTY_FUNCTION__ = "io_loop_handler_run" #12 0x00000000004b2690 in io_loop_handle_timeouts_real (ioloop=0x5ff240) at ioloop.c:280 timeout = (struct timeout *) 0x60e000 item = (struct priorityq_item *) 0x609448 tv = {tv_sec = 140737488347872, tv_usec = 4925072} tv_call = {tv_sec = 6332640, tv_usec = 6287936} t_id = 0 #13 0x00000000004265de in main_deinit () at main.c:269 log_prefix = '\0' <repeats 16 times>, "�\036C", '\0' <repeats 93 times>, "p�C", '\0' <repeats 12 times> log_io = (struct io *) 0x0 modules = (struct module *) 0x0 namespace_pool = 0x44d980 imap_max_line_length = 0 logout_format = 0x0 ioloop = (struct ioloop *) 0x0 client_workarounds = 6329376 capability_string = (string_t *) 0x0 hook_client_created = (void (*)(struct client **)) 0 client_workaround_list = {{name = 0x4c5ce4 "l index", num = 160}, {name = 0x4c5ceb "", num = 164}, { name = 0x4c5cf8 "list index desynced: Children flags for uid=%u wrong in mail index", num = 168}, {name = 0x0, num = 0}, { name = 0x5fe430 "\002", num = 0}} #14 0x000000000041418e in _start (ap=0x0, cleanup=0x7fffffffe6ad) at /usr/src/lib/csu/amd64/crt1.c:69 argc = 32767 argv = (char **) 0x7fffffffe6a0 env = (char **) 0x3 s = 0x0 #15 0x00007fffffffe6ca in ?? () No symbol table info available. #16 0x00007fffffffe6dd in ?? () No symbol table info available.

# 1.1.beta14: /usr/local/etc/dovecot.conf ssl_cert_file: /usr/local/etc/apache2/ssl/mail.pem ssl_key_file: /usr/local/etc/apache2/ssl/mail.pem login_dir: /var/run/dovecot/login login_executable: /usr/local/libexec/dovecot/imap-login mail_max_userip_connections: 25 verbose_proctitle: yes first_valid_uid: 1000 first_valid_gid: 1000 mail_extra_groups: postlocal mail_location: maildir:%h/Maildir:CONTROL=%h/Maildir/dovecot/private/control:INDEX=%h/Maildir/dovecot/private/indexes

mmap_disable: yes mail_nfs_storage: yes mail_nfs_index: yes mail_drop_priv_before_exec: yes mail_plugins: acl fts fts_squat mail_log_max_lines_per_sec: 0 imap_client_workarounds: delay-newmail netscape-eoh tb-extra-mailbox-sep namespace: type: private separator: / inbox: yes list: yes subscriptions: yes namespace: type: private separator: / prefix: mail/ hidden: yes subscriptions: yes namespace: type: private separator: / prefix: Mail/ hidden: yes subscriptions: yes namespace: type: public separator: / prefix: #shared/decs/ location: maildir:/egr/mail/shared/decs:CONTROL=%h/Maildir/dovecot/public/control/decs:INDEX=%h/Maildir/dovecot/public/indexes/decs

list: yes subscriptions: yes auth default: passdb: driver: pam userdb: driver: passwd args: system_user= socket: type: listen client: path: /var/spool/postfix/private/auth mode: 384 user: postfix group: postfix plugin: acl: vfile:/usr/local/etc/dovecot-acls:cache_secs=10 fts: squat