<p>Likely to be the same issue I hunted recently and actually I just pushed a commit for it:</p>
<ul>
<li><a class="commit-link" data-hovercard-type="commit" data-hovercard-url="https://github.com/kamailio/kamailio/commit/814d5cc1f4f5b1e4b95737108dffc1e7d7bd566f/hovercard" href="https://github.com/kamailio/kamailio/commit/814d5cc1f4f5b1e4b95737108dffc1e7d7bd566f"><tt>814d5cc</tt></a></li>
</ul>
<p>No much testing so far, will do more tomorrow -- anyhow, hopefully it fixes the issue.</p>
<p>In what I troubleshooted, the crash happened due to a race in accessing transaction when a reply for a terminated transaction (which already had a final reply received before) came at the moment wait timer was fired for that transaction (5sec later than the final reply), which resulted in destroying the transaction by the timer process, while another process was handling the late reply.</p>

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