[tor-relays] [warn] circuit_mark_for_close under (Linux 4.4.0-21-generic) Tor 0.2.9.10

[warn] circuit_mark_for_close_(): Bug: Duplicate call to circuit_mark_for_close at ../src/or/onion.c:238 (first at ../src/or/command.c:579) (on Tor 0.2.9.10 ) Can this warning be neglected - I thought it is a BSD and not a Linux issue? Got nearly a hundred of them today - all with the same time stamp. Thanks - Paul