Github user jacksontj commented on the issue:
https://github.com/apache/trafficserver/pull/1109
After doing some more looking, the `m_deleted` flag is just marking the
VConn as "we should delete this" and that combined with `m_deletable` lets it
reschedule the delete in the future when it can. The fundamental problem I'm
seeing is it is double freed under some conditions-- since all events trigger a
delete. This is fixed in 7.x with TS-4590 -- so I've updated this PR to
workaround the issue in a simpler mechanism that more closely mirrors what is
happening on 7.x
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