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       the default 1.8 version.
       If you continue to have trouble, you can open a support ticket here:
       https://help.heroku.com
       
       Thanks,
       Heroku

Cleaning up file based variables
ERROR: Job failed: exit code 1

Building Heroku-based application using gliderlabs/herokuish docker image...
Attempting to pull a previously built image for use with --cache-from...
invalid reference format
invalid reference format
No previously cached image found. The docker build will proceed without using a cached image
invalid argument "/v1-0-0:e905c186ceaf7a77d1b0119db31931e7f0b92bfb" for "-t, --tag" flag: invalid reference format
See 'docker build --help'.
Cleaning up file based variables
ERROR: Job failed: exit code 1