bwtestserver gives multiple errors - e.g. SCMP revocation received

[lryll]

Sometimes the bwtestserver works, sometimes (most times after one successful run) it gives many error messages. An excerpt in the following:

INFO[07-17|09:17:57] Received SCMP revocation                 header="Class=PATH(3) Type=REVOKED_IF(4) TotalLen=296B Checksum=3522 Timestamp=2018-07-17 09:17:57.361548 +0200 CEST" payload="Meta: Info=21 CmnHdr=1 AddrHdr=3 PathHdr=8 ExtHdrs=0 L4Hdr=1 L4Proto=UDP\nInfo: InfoF=4 HopF=5 IfID=1 Ingress=false 
[...]
WARN[07-17|09:17:57] error                                    id=39217182 goroutine=dispatcher_bck err="transport error op=\"RecvFrom\"\n    read unix @->/run/shm/sciond/default.sock: use of closed network connection"
INFO[07-17|09:17:57] Stopped                                  id=39217182 goroutine=dispatcher_bck
INFO[07-17|09:17:57] Started                                  id=34cb4ba7 goroutine=dispatcher_bck

See complete log in gist

Another log can be found here

Issue most likely related to issues #54 #55.

The bwtestclient doesn't show any errors.