Re: Imap Sieve errors in 2.4.2

> On 26/03/2026 12:59 EET Alberto via dovecot <[email protected]> wrote:
> 
>  
> Hi,
> I have a Dovecot docker image with last version (2.4.2).
> 
> I'm getting some errors, last time a few minutes ago, when dragging some 
> emails into a folder I had just created.
> ...
> Mar 26 10:48:20 imap([email protected])<451><wHkgJepNsLRYDtBg>: Info: 
> Mailbox INBOX.carpetanueva: Mailbox created
> Mar 26 10:48:24 imap([email protected])<397><x8N6YuhNMs9YDtBg>: Panic: 
> file imap-sieve-storage.c: line 216 (imap_sieve_add_mailbox_event): 
> assertion failed
> : (ismt->src_box == NULL || ismt->src_box == src_box)
> Mar 26 10:48:24 imap([email protected])<397><x8N6YuhNMs9YDtBg>: Error: 
> Raw backtrace: #1 [unw_get_proc_name() failed: -10] -> #2 
> [unw_get_proc_name() failed: -10] -> #3 i_panic[0x7fbaed2ee8ab] -> #4 
> [unw_get_proc_name() failed: -1]
> Mar 26 10:48:24 imap([email protected])<397><x8N6YuhNMs9YDtBg>: Fatal: 
> master: service(imap): child 397 killed with signal 6 (core dumped)
> 
> This breaks Dovecot and I have to restart the container, but it doesn't 
> fix it either. When I access again, I've receive this errors again, 
> until I disable sieve in the imap.conf:
> 
> conf.d/20-imap.conf
> -------------------
> ...
> protocol imap { 
>   
>   
> 
>    # Space separated list of plugins to load (default is global 
> mail_plugins). 
>   
> 
>    mail_plugins { 
>   
>   
> 
> #    imap_sieve = yes 
>   
>   
> 
>      imap_quota = yes 
>   
>   
> 
>      last_login = yes 
>   
>   
> 
>    }
> 
> And I have to keep "imap_sieve" disabled.
> 
> Regards,
> Alberto

Hi!

This is a bug in 2.4.2, that has been fixed and will be part of the 2.4.3 release which should come out very soon. See https://github.com/dovecot/pigeonhole/commit/f96cc4b18109080393f100c580cdd043d2b92d8d (it needs some other commits too but this fixes the issue)

Regards,
Aki

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