Hi Timo, I'm also having the issue reported by Andre.
I've set up the jammy-proposed repository and successfully installed 2.3.16+dfsg1-3ubuntu2.4 but unfortunately the issue persists. My apt history.log: Start-Date: 2025-04-11 17:26:23 Commandline: apt install dovecot-core dovecot-imapd dovecot-lmtpd dovecot-managesieved dovecot-mysql dovecot-pop3d dovecot-managesieved dovecot-sieve Upgrade: dovecot-imapd:amd64 (1:2.3.16+dfsg1-3ubuntu2.1, 1:2.3.16+dfsg1-3ubuntu2.4), dovecot-lmtpd:amd64 (1:2.3.16+dfsg1-3ubuntu2.1, 1:2.3.16+dfsg1-3ubuntu2.4), dovecot-core:amd64 (1:2.3.16+dfsg1-3ubuntu2.1, 1:2.3.16+dfsg1-3ubuntu2.4), dovecot-mysql:amd64 (1:2.3.16+dfsg1-3ubuntu2.1, 1:2.3.16+dfsg1-3ubuntu2.4), dovecot-managesieved:amd64 (1:2.3.16+dfsg1-3ubuntu2.1, 1:2.3.16+dfsg1-3ubuntu2.4), dovecot-sieve:amd64 (1:2.3.16+dfsg1-3ubuntu2.1, 1:2.3.16+dfsg1-3ubuntu2.4), dovecot-pop3d:amd64 (1:2.3.16+dfsg1-3ubuntu2.1, 1:2.3.16+dfsg1-3ubuntu2.4) End-Date: 2025-04-11 17:26:35 And my dovecot logs: Apr 11 18:23:22 ubuntu dovecot: lmtp(1328755): Fatal: master: service(lmtp): child 1328755 killed with signal 6 (core dumps disabled - https://dovecot.org/bugreport.html#coredumps) Apr 11 18:23:22 ubuntu dovecot: lmtp(1329348): Panic: file mail-user.c: line 229 (mail_user_deinit): assertion failed: ((*user)->refcount == 1) Apr 11 18:23:22 ubuntu dovecot: lmtp(1329348): Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(backtrace_append+0x46) [0x7fbc0d1dc0b6] -> /usr/lib/dovecot/libdovecot.so.0(backtrace_get+0x22) [0x7fbc0d1dc1d2] -> /usr/lib/dovecot/libdovecot.so.0(+0x109fab) [0x7fbc0d1e8fab] -> /usr/lib/dovecot/libdovecot.so.0(+0x10a047) [0x7fbc0d1e9047] -> /usr/lib/dovecot/libdovecot.so.0(+0x5cfd3) [0x7fbc0d13bfd3] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0x483c5) [0x7fbc0d2fd3c5] -> dovecot/lmtp [10.20.32.186 DATA](lmtp_local_data+0x3e6) [0x558813741996] -> dovecot/lmtp [10.20.32.186 DATA](client_default_cmd_data+0x191) [0x5588137404c1] -> dovecot/lmtp [10.20.32.186 DATA](cmd_data_continue+0x180) [0x558813740250] -> /usr/lib/dovecot/libdovecot.so.0(+0x7c6d6) [0x7fbc0d15b6d6] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x6d) [0x7fbc0d1ff25d] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0x13a) [0x7fbc0d20095a] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x54) [0x7fbc0d1ff304] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x40) [0x7fbc0d1ff4c0] -> /usr/lib/dovecot/libdovecot.so.0(master_service_run+0x17) [0x7fbc0d171727] -> dovecot/lmtp [10.20.32.186 DATA](main+0x225) [0x55881373eec5] -> /lib/x86_64-linux-gnu/libc.so.6(+0x29d90) [0x7fbc0ced8d90] -> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x80) [0x7fbc0ced8e40] -> dovecot/lmtp [10.20.32.186 DATA](_start+0x25) [0x55881373efc5] -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1992848 Title: lmtp crashes with: Panic: file mail-user.c: line 229 (mail_user_deinit): assertion failed: ((*user)->refcount == 1) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dovecot/+bug/1992848/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
