mail_filter and mail_filter_out broken somewhere between 2.2.27 and 2.3.4, problem still exists in git

[Aki Tuomi]

On 5.9.2019 5.29, Michael Fincham via dovecot wrote:
> Hi Dovecot folks,
>
> I recently reported this bug in Debian (https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=939442) after a stretch -> buster upgrade, however since I can reproduce it using the latest 2.4 from git I thought perhaps I ought to take it straight upstream.
>
> Here's the text I provided Debian about the issue, and below that I've included a syslog snip showing the same issue in a fresh build of git master as well.
>
> mail_filter_out seems to fully panic (backtrace below), whereas mail_filter is just behaving oddly.
>
> Thanks :)


Hi!

Thank you for reporting this bug, we are tracking it internally as DOP-1408.

Aki