On the other hand, I can't seem to get it to crash if I send fully-formed requests like this one:
POST /csrp_rpc/ HTTP/1.1 Content-Type: application/json Content-Length: 54 Call-ID: 13d40122621463619e0c14a1f1dad01a Host: 172.30.110.4:5060 Connection: close
{"jsonrpc":"2.0","id":"ef8e1","method":"core.version"}
... so, there's something amiss here.