Hi,

I'm running Dovecot 2.3.11 from Dovet Repository on Debian 9.13. I get the following error when some of our users are doing searches in mailboxes.

My error log: ... Nov 25 17:32:13 dcot-mydomain-1 dovecot: imap-login: ID sent: x-session-id=Dh04+PC0+O9t+MsP, x-originating-ip=109.248.203.15, x-originating-port=61432, x-connected-ip=10.10.10.10206, x-connected-port=993, x-proxy-ttl=4: user=<>, rip=109.248.203.15, lip=10.10.10.10206, secured, session=<Dh04+PC0+O9t+MsP> Nov 25 17:32:13 dcot-mydomain-1 dovecot: imap-login: Login: user=<user@domain.com>, method=PLAIN, rip=109.248.203.15, lip=10.10.10.10206, mpid=110860, secured, session=<Dh04+PC0+O9t+MsP> Nov 25 17:32:18 dcot-mydomain-1 dovecot: imap(user@domain.com pid:110860 session:<Dh04+PC0+O9t+MsP>): Panic: file message-parser.c: line 174 (message_part_finish): assertion failed: (ctx->nested_parts_count > 0) Nov 25 17:32:18 dcot-mydomain-1 dovecot: imap(user@domain.com pid:110860 session:<Dh04+PC0+O9t+MsP>): Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(backtrace_append+0x42) [0x7fd61a26c0e2] -> /usr/lib/dovecot/libdovecot.so.0(backtrace_get+0x1e) [0x7fd61a26c1ee] -> /usr/lib/dovecot/libdovecot.so.0(+0xe9c81) [0x7fd61a276c81] -> /usr/lib/dovecot/libdovecot.so.0(+0xe9d21) [0x7fd61a276d21] -> /usr/lib/dovecot/libdovecot.so.0(i_fatal+0) [0x7fd61a1cbfa4] -> /usr/lib/dovecot/libdovecot.so.0(+0xc990e) [0x7fd61a25690e] -> /usr/lib/dovecot/libdovecot.so.0(message_parser_parse_next_block+0xdc) [0x7fd61a257f8c] -> /usr/lib/dovecot/libdovecot.so.0(message_search_msg+0xa0) [0x7fd61a25a810] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0xc4c5f) [0x7fd61a5fbc5f] -> /usr/lib/dovecot/libdovecot-storage.so.0(mail_search_args_foreach+0x45) [0x7fd61a577575] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0xc5a5e) [0x7fd61a5fca5e] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0xc6f63) [0x7fd61a5fdf63] -> /usr/lib/dovecot/libdovecot-storage.so.0(index_storage_search_next_nonblock+0x10c) [0x7fd61a5fe68c] -> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_search_next_nonblock+0x22) [0x7fd61a580fb2] -> dovecot/imap(+0x257f0) [0x55be0929f7f0] -> dovecot/imap(command_exec+0x64) [0x55be09297ff4] -> dovecot/imap(+0x24a32) [0x55be0929ea32] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handle_timeouts+0x137) [0x7fd61a28f707] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0xc1) [0x7fd61a291211] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x59) [0x7fd61a28fa69] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x7fd61a28fc98] -> /usr/lib/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7fd61a1fd2f3] -> dovecot/imap(main+0x338) [0x55be09287f68] -> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf1) [0x7fd619e0e2e1] -> dovecot/imap(_start+0x2a) [0x55be0928816a] Nov 25 17:32:18 dcot-mydomain-1 dovecot: imap(user@domain.com pid:110860 session:<Dh04+PC0+O9t+MsP>): Fatal: master: service(imap): child 110860 killed with signal 6 (core dumps disabled - https://dovecot.org/bugreport.html#coredumps) ...

I searched the archives and found this patch which seems to fix it: https://github.com/dovecot/core/commit/a668d767a710ca18ab6e7177d8e8be22a6b02...

Have you planned to release new Debian 9 packages in dovecot repository where this patch will be applied?

My current Dovecot version is: ii dovecot-core 2:2.3.11.3-3+debian9 amd64 secure POP3/IMAP server - core files ii dovecot-dbg 2:2.3.11.3-3+debian9 amd64 secure POP3/IMAP server - debug symbols ii dovecot-imapd 2:2.3.11.3-3+debian9 amd64 secure POP3/IMAP server - IMAP daemon ii dovecot-lmtpd 2:2.3.11.3-3+debian9 amd64 secure POP3/IMAP server - LMTP server ii dovecot-managesieved 2:2.3.11.3-3+debian9 amd64 secure POP3/IMAP server - ManageSieve server ii dovecot-mysql 2:2.3.11.3-3+debian9 amd64 secure POP3/IMAP server - MySQL support ii dovecot-pop3d 2:2.3.11.3-3+debian9 amd64 secure POP3/IMAP server - POP3 daemon ii dovecot-sieve 2:2.3.11.3-3+debian9 amd64 secure POP3/IMAP server - Sieve filters support ...

Many thanks Urban