`oasis deploy` finishes successfully on error

[matevz]

Description of the bug Using the secret ballot tutorial from https://docs.oasis.dev, when running oasis deploy, I get the following

oa@matevz-oa:~/tmp/tutorials/ballot$ oasis deploy
   Deploying ballot (app)
oa@matevz-oa:~/tmp/tutorials/ballot$ oasis deploy -p local
   Deploying ballot (app)
oa@matevz-oa:~/tmp/tutorials/ballot$ echo $?
0

Clearly the smart contract wasn't deployed and no smart contract address was reported. I guess it silently crashed.

Steps to reproduce

1. git clone https://github.com/oasislabs/tutorials
2. cd tutorials/ballot
3. oasis chain
4. oasis deploy - p local

Expected behavior Ballot smart contract should be deployed or an error reported.

Environment

• OS: Ubuntu 18.04
• Versions of relevant software and tools: Rust 1.39 nightly-2019-08-26

Additional information tutorials/hello-world deploys fine.