Bug in darwin.js

[ttrd06]

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System information

• Have I written custom code (as opposed to using zenbot vanilla): NO
• OS Platform and Distribution (e.g., Linux Ubuntu 16.04): linux amd64
• Zenbot version: latest from unstable
• NodeJS version: 8.9.4
• Python version: no
• Exact command to reproduce:
  ./scripts/genetic_backtester/darwin.js --selector="gdax.ETH-EUR" --days=7 --currency_capital=800 --asset_capital=1 --use_strategies=bollinger --population=190

Describe the problem

If you launch the command above, the error "Bad output detected TypeError: Cannot read property 'currency_capital' of undefined" appears between the lines of generations.
At the end of generations, you can not have the results in the simulation folder.
Before i git pull the latests commits, this command worked !

Source code / logs

Include any logs or source code that would be helpful to diagnose the problem. If including tracebacks, please include the full traceback. Large logs and files should be attached. Try to provide a reproducible test case that is the bare minimum necessary to generate the problem.

[glennfu]

Simple explanation for why this happened is that one of the inner sims blew up, and the output was "unparsable". So when it tries to process the result, the first piece it checks is params.currency_capital and gets nothing good. It would be awesome if it would actually bubble up the inner error.

[station384]

This error is addressed in unstable