https://bugs.exim.org/show_bug.cgi?id=2915
--- Comment #4 from Graeme Fowler <graeme@???> ---
(In reply to Jeremy Harris from comment #2)
> Not repro'd so far, using a 4.95 from git, so I assume there's some
> data-dependent ACL processing flow branch involved. You're probably right
> about re-use of a freed item though. I suspect I'd need more information
> (which you have elided) in order to duplicate the flow.
>
> You could try enabling the debug_store option, in case that gives any
> more useful info. You could use the control=debug/kill ACL modifier
> to do speculative debug capture.
Happy to send you a complete core dump and corresponding config (if that
helps), but not posting here for obvious reasons.
I did use the control=debug/kill modifier, which dumped a lot of info but once
the SIGSEGV happens it simply stops altogether. Will see if I can find a
corresponding debuglog and core file.
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