tor on SunOS: [err] Error from libevent: evport.c:425: Assertion evpd->ed_pending[i] == fd failed in evport_del

Tor 0.3.3.7 (git-035a35178c92da94) running on SunOS with Libevent 2.1.8-stable, OpenSSL 1.0.2o, Zlib 1.2.11, Liblzma N/A, and Libzstd N/A.

(this error was also observed under tor 0.3.3.6 for about two weeks, no change with updating to 0.3.3.7)

every 10-20 minutes (sometimes longer) the process crashes with:

[err] Error from libevent: evport.c:425: Assertion evpd->ed_pending[i] == fd failed in evport_del

Contrary to tor crashes no libevent stacktrace is provided in default output.

The OS-Project under which the Service is running should have sufficent fd-ulimits:

ulimit -n
65536

Service privileges for the running User are pretty standard:

privileges='basic,net_privaddr'

Trac:
Username: ruebezahl