ocserv sigsegv

[Jakob]

hi list,

i'm having sigsegvs in ocserv's childs after successful tun device creation!

here's my setup: ocserv 0.1.2 with nettle-2.7.1 and gnutls-3.1.10 on 
ubuntu linux, client is cisco anyconnect 3.0.4235 on windows 7. i put 
<BypassDownloader>true</BypassDownloader> in anyconnect's local 
preferences xml.

connect, authentication, tun device creation works fine. then, the 
ocserv child dies with sigsegv. anyconnect reconnects, and everything 
repeats.

here's a log from ocserv -f -d
ocserv[457]: [main] reusing tun device vpns0
ocserv[457]: [main] assigning tun device vpns0
ocserv[457]: [1.2.3.4]:51436 user 'abc' of group 'abc' re-authenticated 
(using cookie)
ocserv[502]: [1.2.3.4]:51436 sending IPv4 192.168.1.2
ocserv[502]: [1.2.3.4]:51436 adding route 192.168.1.0/255.255.255.0
ocserv[502]: [1.2.3.4]:51436 peer CSTP MTU is 1406
ocserv[502]: [1.2.3.4]:51436 TCP MSS is 1407
ocserv[502]: [1.2.3.4]:51436 reducing MTU due to TCP MSS to 1399
ocserv[502]: [1.2.3.4]:51436 selected MTU is 1399
ocserv[457]: [1.2.3.4]:51436 setting vpns0 MTU to 1399
ocserv[502]: [1.2.3.4]:51436 TCP MSS is 1407
ocserv[502]: [1.2.3.4]:51436 reducing MTU due to TCP MSS to 1378
ocserv[457]: [main] Child 502 died with sigsegv

i'm pretty much at a loss here and would be grateful for any advice!

thank you very much,
jakob