This is a Bug Report

Description

For bug reports:

• What went wrong?
  Deployment / packaging fails silently for config that references external provider.
• What did you expect should have happened?
  Successful deployment.
• What was the config you used?

Basic example

serverless.yml:

service: service-name

provider: ${file(./resources/data.yml):provider}

resources:
  Resources:
     ..

/resources/data.yml

provider:
  region: us-west-2

• What stacktrace or error message from your provider did you see?
  There was no stack trace, but the last output with SLS_DEBUG=* was:

Serverless: Packaging service...

Additional Data

Copying the provider information over from the other file results in successful packaging.
Adding a functions parameter to the config also results in a successful packaging.

• Serverless Framework Version you're using:
  1.26.1
• Operating System:
  Ubuntu 16.04