Miner dies when creating a transaction (on docker)

[kingsleyh]

The miner was running and when I created a transaction the miner died with this error:

[ 2018-04-27 18:03:28 --    Info ] 100 works, 41 [Work/s] (thread: 1)
Invalid memory access (signal 11) at address 0x28
[0x4b3996] *CallStack::print_backtrace:Int32 +118
[0x489fab] __crystal_sigfault_handler +75
[0x7f3a3e5b9390] ???
[0x4ce34b] *Fiber::switch_stacks<Pointer(Pointer(Void)), Pointer(Pointer(Void))>:Nil +11
[0x4a65a0] ???

Is this related to the #140 ??

I was running in our docker instance:

sushim --threads 10

when I tried to restart the miner after this error - it just kept giving the same error unless I set the threads to 1 or 2 instead of 10

--- UPDATE

so after some further testing - it seems the problem is only happening only on the docker instance when running the miner and create transaction on the same instance.

docker run -it sushichain/sushichain /bin/bash
sushim -w w1.json -n http://testnet.sushichain.io:3000 --threads=20

then reconnect to the container in another shell (wait 10 mins for miner to make some coins):

docker ps (find <container_id>
docker exec -it <container_id> /bin/bash
sushi tx create -m 1 -f 1 -a VDA4OTFjMTcyZmYwZmQzOWUzOTNiYjdmYmU1N2UzNWQ2NTE3YjVjYjI5MWViMjhi

create several transactions in a row - and see the miner dies.

Could not reproduce in these scenarios:

1. on osx
2. miner on docker and create tx from osx