Upgrading libevent based TCP server implementation from commit id 665d79f1 to ec8d7a5a results in random crashes about libevent

[mareksm]

From the server perspective, only concerning changes (going from one commit to the other) are in bufferevent_pair.c, bufferevent_ssl.c, bufferevent_filter.c, evthread.c and evutil_time.c.

[mareksm]

Something has changed going from earlier (stable) commit id to the newer one. Could it be updates involving EVUTIL_ASSERT, BEV_IS_FILTER changes in those source files?

[azat]

There is not too much can be done without stacktrace or reproducer, please provide one or another.
You can configure your server to preserve core dumps and compile with -O2 -g3
And/or run under ASAN

[azat]

Something has changed going from earlier (stable) commit id to the newer one. Could it be updates involving EVUTIL_ASSERT, BEV_IS_FILTER changes in those source files?

I don't see how it is possible, now upcast() cannot return NULL, but everywhere it is used now it dereference the pointer without check anyway

[mareksm]

The server is not using http module from libevent.
No problem with the server when running with commit id 665d79f