Background

crashes at startup with panic

Your environment

0.4.1-beta commit=28b12116e42c83149b6c6b93b70d669a0702bd2d
Linux instance-1 4.13.0-1013 x86_64 x86_64 x86_64 GNU/Linux
bitcoind 0.16

https://pastebin.com/raw/8ChgyieB
and log
https://pastebin.com/raw/nPgFrk8u