Hi,
It would be helpful if you could obtain a rawlog of the connection:
https://doc.dovecot.org/2.4.2/core/admin/rawlog.html#pre-login-rawlog
Also, you need to install (or compile with) debug symbols to obtain a
more useful backtrace.
Regards,
Stephan.
Op 25-11-2025 om 14:51 schreef Bjoern Franke via dovecot:
Hi,
while trying to connect with "sieve-connect", managesieve crashed:
Nov 25 14:21:08 mail.schafweide.org dovecot[440904]:
managesieve-login: Panic: file client.c: line 350
(managesieve_client_input_next_cmd): assertion failed: (args != NULL)
Nov 25 14:21:08 mail.schafweide.org systemd-coredump[440938]: [🡕]
Process 440934 (managesieve-log) of user 74 dumped core.
Stack trace of thread 440934:
                                                             #0
0x000079c6cfa9890c n/a (libc.so.6 + 0x9890c)
                                                             #1
0x000079c6cfa3e3a0 raise (libc.so.6 + 0x3e3a0)
                                                             #2
0x000079c6cfa2557a abort (libc.so.6 + 0x2557a)
                                                             #3
0x000079c6cfe5ffff n/a (libdovecot.so.0 + 0x5ffff)
                                                             #4
0x000079c6cff4f095 n/a (libdovecot.so.0 + 0x14f095)
                                                             #5
0x000079c6cfe5feb6 i_panic (libdovecot.so.0 + 0x5feb6)
                                                             #6
0x000062e017df80de n/a (/usr/lib/dovecot/managesieve-login + 0x30de)
                                                             #7
0x000062e017df8887 n/a (/usr/lib/dovecot/managesieve-login + 0x3887)
                                                             #8
0x000079c6cff681f4 io_loop_call_io (libdovecot.so.0 + 0x1681f4)
                                                             #9
0x000079c6cff6a2db io_loop_handler_run_internal (libdovecot.so.0 +
0x16a2db)
                                                             #10
0x000079c6cff6a397 io_loop_handler_run (libdovecot.so.0 + 0x16a397)
                                                             #11
0x000079c6cff6a599 io_loop_run (libdovecot.so.0 + 0x16a599)
                                                             #12
0x000079c6cfeabce1 master_service_run (libdovecot.so.0 + 0xabce1)
                                                             #13
0x000079c6d02f4350 login_binary_run (libdovecot-login.so.0 + 0x14350)
                                                             #14
0x000079c6cfa27635 n/a (libc.so.6 + 0x27635)
                                                             #15
0x000079c6cfa276e9 __libc_start_main (libc.so.6 + 0x276e9)
                                                             #16
0x000062e017df8405 n/a (/usr/lib/dovecot/managesieve-login + 0x3405)
                                                             ELF
object binary architecture: AMD x86-64
Nov 25 14:21:08 mail.schafweide.org dovecot[440904]:
managesieve-login: Fatal: master: service(managesieve-login): child
440934 killed with signal 6 (core dumped)
I'm using dovecot/pigeonhole 2.4.2 on Arch.
Regards
Bjoern
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